Fix iOS ProgressBar bounding box

[AdamEssenmacher]

Description of Change

Fixes iOS and MacCatalyst ProgressBar sizing so the native UIProgressView visually honors the MAUI-arranged height.

Previously, ProgressBar could be arranged with an explicit height, but UIProgressView kept its native intrinsic visual height. This meant requested heights like 1, 100, and 1000 still produced a native progress view around its default thin height.

This change wraps the iOS/MacCatalyst UIProgressView in a handler container that owns the MAUI layout bounds. The native progress view remains the public PlatformView, is centered inside the container, and is vertically scaled from its measured natural height to the arranged container height during layout.

The change also re-enables the shared native bounding-box assertion for IProgress and adds a focused iOS/MacCatalyst test that verifies handler.PlatformView itself honors explicit sizes.

Validation:

• MacCatalyst Category=ProgressBar: 66 run, 60 passed, 6 ignored
• MacCatalyst Category=Label: 109 run, 103 passed, 6 ignored
• iOS simulator Category=ProgressBar: 66 run, 65 passed, 1 ignored
• iOS simulator Category=Label: 109 run, 108 passed, 1 ignored

Issues Fixed

Fixes #7935

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

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• Run remotely in PowerShell:

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[dotnet-policy-service]

Hey there @@AdamEssenmacher! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[kubaflo]

/review -b feature/regression-check -p ios

[kubaflo]

/review -b feature/regression-check -p ios

[kubaflo]

/review -b feature/regression-check -p ios

[kubaflo]

/review -b feature/regression-check -p ios

[MauiBot]

🤖 Automated review — alternative fix proposed

The expert-reviewer evaluation compared the PR fix against #1 automatically generated candidates and selected try-fix-1 as the strongest fix.

Why: try-fix-1 places the vertical scale transform directly on PlatformView in PlatformArrange, eliminating the PR's forced WrapperView subclass, the copy-pasted SetupContainer override, and 4 of the 6 PublicAPI entries — while producing identical observable behavior on the gate tests (NativeProgressBarBoundingBoxHonorsExplicitSize and the re-enabled IProgress/ILabel branches of ReturnsNonEmptyNativeBoundingBox). It also avoids the SetProgress(animated:true) jitter and shadow-distortion risks present in try-fix-2.

Please consider applying the candidate diff below (or use it as guidance). Once you push an update, this workflow will re-trigger and re-evaluate.

Candidate diff (`try-fix-1`)

diff --git a/src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs b/src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs
index 4f15afc6ffde..0000000000001 100644
--- a/src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs
+++ b/src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs
@@ -1,4 +1,6 @@
 using System;
+using CoreGraphics;
+using Microsoft.Maui.Graphics;
 using ObjCRuntime;
 using UIKit;
 
@@ -11,6 +13,46 @@ protected override UIProgressView CreatePlatformView()
 			return new UIProgressView(UIProgressViewStyle.Default);
 		}
 
+		public override void PlatformArrange(Rect rect)
+		{
+			var platformView = PlatformView;
+			if (platformView is null)
+			{
+				base.PlatformArrange(rect);
+				return;
+			}
+
+			// UIProgressView has a fixed ~2pt intrinsic height. To honor explicit Height,
+			// reset to identity so the base arrange writes natural-size Bounds, then apply
+			// a vertical scale to fill the requested height. GetBoundingBox honors CALayer
+			// transforms via ConvertRectToView, so the reported size matches the request.
+			// See https://github.com/dotnet/maui/issues/7935.
+			platformView.Transform = CGAffineTransform.MakeIdentity();
+			base.PlatformArrange(rect);
+
+			var targetHeight = rect.Height < 0 ? 0 : rect.Height;
+			var targetWidth = rect.Width < 0 ? 0 : rect.Width;
+			if (targetHeight <= 0 || targetWidth <= 0)
+				return;
+
+			var natural = platformView.SizeThatFits(new CGSize(targetWidth, targetHeight)).Height;
+			if (!IsPositiveFinite(natural))
+				natural = platformView.IntrinsicContentSize.Height;
+			if (!IsPositiveFinite(natural))
+				return;
+			if (System.Math.Abs((double)natural - targetHeight) < 0.5)
+				return;
+
+			var center = platformView.Center;
+			platformView.Bounds = new CGRect(0, 0, targetWidth, natural);
+			platformView.Center = center;
+			platformView.Transform = CGAffineTransform.MakeScale(1, (nfloat)(targetHeight / (double)natural));
+		}
+
+		static bool IsPositiveFinite(nfloat value)
+		{
+			var d = (double)value;
+			return d > 0 && !double.IsNaN(d) && !double.IsInfinity(d);
+		}
+
 		public static void MapProgress(IProgressBarHandler handler, IProgress progress)
 		{
 			handler.PlatformView?.UpdateProgress(progress);
diff --git a/src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt b/src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt
index 46f10522b960..0000000000002 100644
--- a/src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt
+++ b/src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt
@@ -1,5 +1,6 @@
 #nullable enable
 override Microsoft.Maui.Handlers.LabelHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
+override Microsoft.Maui.Handlers.ProgressBarHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect rect) -> void
 override Microsoft.Maui.Handlers.ShapeViewHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
 override Microsoft.Maui.Handlers.StepperHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
 override Microsoft.Maui.Platform.MauiTextView.TextAlignment.get -> UIKit.UITextAlignment
diff --git a/src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt b/src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt
index 46f10522b960..0000000000003 100644
--- a/src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt
+++ b/src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt
@@ -1,5 +1,6 @@
 #nullable enable
 override Microsoft.Maui.Handlers.LabelHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
+override Microsoft.Maui.Handlers.ProgressBarHandler.PlatformArrange(Microsoft.Maui.Graphics.Rect rect) -> void
 override Microsoft.Maui.Handlers.ShapeViewHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
 override Microsoft.Maui.Handlers.StepperHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
 override Microsoft.Maui.Platform.MauiTextView.TextAlignment.get -> UIKit.UITextAlignment
diff --git a/src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBaseOfT.Tests.cs b/src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBaseOfT.Tests.cs
index dd31953997f8..0000000000004 100644
--- a/src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBaseOfT.Tests.cs
+++ b/src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBaseOfT.Tests.cs
@@ -306,12 +306,10 @@ public virtual async Task ReturnsNonEmptyNativeBoundingBox(int size)
 			var nativeBoundingBox = await GetValueAsync(view, handler => GetBoundingBox(handler));
 			Assert.NotEqual(nativeBoundingBox, Graphics.Rect.Zero);
 
-			// Currently there's an issue with label/progress where they don't set the frame size to
-			// the explicit Width and Height values set
-			// https://github.com/dotnet/maui/issues/7935
 			if (view is ILabel)
 			{
-				// TODO:
+				var expectedSize = new Size(size, size);
+				AssertWithinTolerance(expectedSize, nativeBoundingBox.Size);
 			}
 			else if (view is IBorderView)
 			{
@@ -338,7 +336,8 @@ public virtual async Task ReturnsNonEmptyNativeBoundingBox(int size)
 #endif
 			else if (view is IProgress)
 			{
-				AssertWithinTolerance(size, nativeBoundingBox.Size.Width);
+				var expectedSize = new Size(size, size);
+				AssertWithinTolerance(expectedSize, nativeBoundingBox.Size);
 			}
 			else
 			{
diff --git a/src/Core/tests/DeviceTests/Handlers/ProgressBar/ProgressBarHandlerTests.iOS.cs b/src/Core/tests/DeviceTests/Handlers/ProgressBar/ProgressBarHandlerTests.iOS.cs
index 7d463cf859f6..0000000000005 100644
--- a/src/Core/tests/DeviceTests/Handlers/ProgressBar/ProgressBarHandlerTests.iOS.cs
+++ b/src/Core/tests/DeviceTests/Handlers/ProgressBar/ProgressBarHandlerTests.iOS.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Threading.Tasks;
+using Microsoft.Maui.DeviceTests.Stubs;
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Handlers;
 using ObjCRuntime;
@@ -16,6 +17,24 @@ UIProgressView GetNativeProgressBar(ProgressBarHandler progressBarHandler) =>
 		double GetNativeProgress(ProgressBarHandler progressBarHandler) =>
 			GetNativeProgressBar(progressBarHandler).Progress;
 
+		[Theory(DisplayName = "Native ProgressBar Bounding Box Honors Explicit Size")]
+		[InlineData(1)]
+		[InlineData(100)]
+		[InlineData(1000)]
+		public async Task NativeProgressBarBoundingBoxHonorsExplicitSize(int size)
+		{
+			var progressBar = new ProgressBarStub
+			{
+				Height = size,
+				Width = size,
+				Progress = 0.5,
+			};
+
+			var nativeBoundingBox = await GetValueAsync(progressBar, handler => GetNativeProgressBar(handler).GetBoundingBox());
+
+			AssertWithinTolerance(new Size(size, size), nativeBoundingBox.Size);
+		}
+
 		async Task ValidateNativeProgressColor(IProgress progressBar, Color color, Action action = null)
 		{
 			var expected = await GetValueAsync(progressBar, handler =>

[kubaflo]

/review -b feature/regression-check -p ios

[MauiBot]

🤖 Automated review — alternative fix proposed

The expert-reviewer evaluation compared the PR fix against #2 automatically generated candidates and selected try-fix-2 as the strongest fix.

Why: try-fix-2 passes the same regression suite as the PR (65/65 active, 1 skipped) while reducing the new public-API surface from 3 entries to 1 (only NeedsContainer.get). The fix is encapsulated on the platform view (MauiProgressView : UIProgressView), the layer where UIKit's intrinsic-height clamp actually lives, instead of being spread across a handler override, a SetupContainer override, and a custom WrapperView subclass. It also retains a defensive LayoutSubviews reapplication of the vertical transform that try-fix-1 sacrifices.

Please consider applying the candidate diff below (or use it as guidance). Once you push an update, this workflow will re-trigger and re-evaluate.

Candidate diff (`try-fix-2`)

diff --git a/src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs b/src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs
index 4f15afc6ffde..aaaaaaaaaaaa 100644
--- a/src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs
+++ b/src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs
@@ -1,4 +1,5 @@
 using System;
+using Microsoft.Maui.Platform;
 using ObjCRuntime;
 using UIKit;
 
@@ -6,9 +7,14 @@ namespace Microsoft.Maui.Handlers
 {
 	public partial class ProgressBarHandler : ViewHandler<IProgress, UIProgressView>
 	{
+		// NeedsContainer must be true so the WrapperView becomes the bounding-box reference
+		// for ConvertRectToView - without it, GetPlatformViewBounds walks up to the platform
+		// view itself and ignores its CGAffineTransform.
+		public override bool NeedsContainer => true;
+
 		protected override UIProgressView CreatePlatformView()
 		{
-			return new UIProgressView(UIProgressViewStyle.Default);
+			return new MauiProgressView(UIProgressViewStyle.Default);
 		}
 
 		public static void MapProgress(IProgressBarHandler handler, IProgress progress)
diff --git a/src/Core/src/Platform/iOS/MauiProgressView.cs b/src/Core/src/Platform/iOS/MauiProgressView.cs
new file mode 100644
index 000000000000..bbbbbbbbbbbb
--- /dev/null
+++ b/src/Core/src/Platform/iOS/MauiProgressView.cs
@@ -0,0 +1,89 @@
+using System;
+using CoreGraphics;
+using UIKit;
+
+namespace Microsoft.Maui.Platform
+{
+	// A UIProgressView that honors any explicit height assigned by the MAUI layout
+	// system. UIKit clamps UIProgressView's intrinsic vertical size to ~2-4pt, so
+	// to render at an arbitrary height we keep the layer's own bounds at the
+	// "natural" UIKit height and apply a vertical CGAffineTransform.MakeScale to
+	// stretch the track to the arranged height.
+	internal sealed class MauiProgressView : UIProgressView
+	{
+		nfloat _arrangedHeight;
+
+		public MauiProgressView(UIProgressViewStyle style)
+			: base(style)
+		{
+		}
+
+		public override CGRect Bounds
+		{
+			get => base.Bounds;
+			set
+			{
+				_arrangedHeight = value.Height;
+				var natural = NaturalHeightFor(value.Size);
+				base.Bounds = new CGRect(value.X, value.Y, value.Width, natural);
+				ApplyVerticalScale();
+			}
+		}
+
+		public override CGRect Frame
+		{
+			get => base.Frame;
+			set
+			{
+				_arrangedHeight = value.Height;
+				var natural = NaturalHeightFor(value.Size);
+				base.Frame = new CGRect(value.X, value.Y, value.Width, natural);
+				ApplyVerticalScale();
+			}
+		}
+
+		public override void LayoutSubviews()
+		{
+			Transform = CGAffineTransform.MakeIdentity();
+			base.LayoutSubviews();
+			ApplyVerticalScale();
+		}
+
+		void ApplyVerticalScale()
+		{
+			var current = base.Bounds.Height;
+			if (!IsPositiveFinite(current) || !IsPositiveFinite(_arrangedHeight))
+			{
+				return;
+			}
+
+			Transform = CGAffineTransform.MakeScale(1, _arrangedHeight / current);
+		}
+
+		nfloat NaturalHeightFor(CGSize size)
+		{
+			var n = SizeThatFits(size).Height;
+			if (!IsPositiveFinite(n))
+			{
+				n = IntrinsicContentSize.Height;
+			}
+
+			if (!IsPositiveFinite(n))
+			{
+				n = 2;
+			}
+
+			return n;
+		}
+
+		static bool IsPositiveFinite(nfloat value)
+		{
+			var d = (double)value;
+			return d > 0 && !double.IsNaN(d) && !double.IsInfinity(d);
+		}
+	}
+}
diff --git a/src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt b/src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt
index 46f10522b960..cccccccccccc 100644
--- a/src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt
+++ b/src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt
@@ -1,5 +1,6 @@
 #nullable enable
 override Microsoft.Maui.Handlers.LabelHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
+override Microsoft.Maui.Handlers.ProgressBarHandler.NeedsContainer.get -> bool
 override Microsoft.Maui.Handlers.ShapeViewHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
 override Microsoft.Maui.Handlers.StepperHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
 override Microsoft.Maui.Platform.MauiTextView.TextAlignment.get -> UIKit.UITextAlignment
diff --git a/src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt b/src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt
index 46f10522b960..cccccccccccc 100644
--- a/src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt
+++ b/src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt
@@ -1,5 +1,6 @@
 #nullable enable
 override Microsoft.Maui.Handlers.LabelHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
+override Microsoft.Maui.Handlers.ProgressBarHandler.NeedsContainer.get -> bool
 override Microsoft.Maui.Handlers.ShapeViewHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
 override Microsoft.Maui.Handlers.StepperHandler.GetDesiredSize(double widthConstraint, double heightConstraint) -> Microsoft.Maui.Graphics.Size
 override Microsoft.Maui.Platform.MauiTextView.TextAlignment.get -> UIKit.UITextAlignment
diff --git a/src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBaseOfT.Tests.cs b/src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBaseOfT.Tests.cs
index dd31953997f8..21ea764e24c7 100644
--- a/src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBaseOfT.Tests.cs
+++ b/src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBaseOfT.Tests.cs
@@ -306,12 +306,10 @@ public virtual async Task ReturnsNonEmptyNativeBoundingBox(int size)
 			var nativeBoundingBox = await GetValueAsync(view, handler => GetBoundingBox(handler));
 			Assert.NotEqual(nativeBoundingBox, Graphics.Rect.Zero);
 
-			// Currently there's an issue with label/progress where they don't set the frame size to
-			// the explicit Width and Height values set
-			// https://github.com/dotnet/maui/issues/7935
 			if (view is ILabel)
 			{
-				// TODO:
+				var expectedSize = new Size(size, size);
+				AssertWithinTolerance(expectedSize, nativeBoundingBox.Size);
 			}
 			else if (view is IBorderView)
 			{
@@ -338,7 +336,8 @@ public virtual async Task ReturnsNonEmptyNativeBoundingBox(int size)
 #endif
 			else if (view is IProgress)
 			{
-				AssertWithinTolerance(size, nativeBoundingBox.Size.Width);
+				var expectedSize = new Size(size, size);
+				AssertWithinTolerance(expectedSize, nativeBoundingBox.Size);
 			}
 			else
 			{
diff --git a/src/Core/tests/DeviceTests/Handlers/ProgressBar/ProgressBarHandlerTests.iOS.cs b/src/Core/tests/DeviceTests/Handlers/ProgressBar/ProgressBarHandlerTests.iOS.cs
index 7d463cf859f6..42b6b445123a 100644
--- a/src/Core/tests/DeviceTests/Handlers/ProgressBar/ProgressBarHandlerTests.iOS.cs
+++ b/src/Core/tests/DeviceTests/Handlers/ProgressBar/ProgressBarHandlerTests.iOS.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Threading.Tasks;
+using Microsoft.Maui.DeviceTests.Stubs;
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Handlers;
 using ObjCRuntime;
@@ -16,6 +17,24 @@ UIProgressView GetNativeProgressBar(ProgressBarHandler progressBarHandler) =>
 		double GetNativeProgress(ProgressBarHandler progressBarHandler) =>
 			GetNativeProgressBar(progressBarHandler).Progress;
 
+		[Theory(DisplayName = "Native ProgressBar Bounding Box Honors Explicit Size")]
+		[InlineData(1)]
+		[InlineData(100)]
+		[InlineData(1000)]
+		public async Task NativeProgressBarBoundingBoxHonorsExplicitSize(int size)
+		{
+			var progressBar = new ProgressBarStub
+			{
+				Height = size,
+				Width = size,
+				Progress = 0.5,
+			};
+
+			var nativeBoundingBox = await GetValueAsync(progressBar, handler => GetNativeProgressBar(handler).GetBoundingBox());
+
+			AssertWithinTolerance(new Size(size, size), nativeBoundingBox.Size);
+		}
+
 		async Task ValidateNativeProgressColor(IProgress progressBar, Color color, Action action = null)
 		{
 			var expected = await GetValueAsync(progressBar, handler =>

[MauiBot]

🤖 AI Summary

👋 @AdamEssenmacher — new AI review results are available. Please review the latest session below.

📊 Review Session — bb3c957 · Fix iOS ProgressBar bounding box · 2026-05-20 15:18 UTC

🚦 Gate — Test Before & After Fix

Gate Result: ✅ PASSED

Platform: IOS · Base: main · Merge base: 568bbfb2

Test	Without Fix (expect FAIL)	With Fix (expect PASS)
📱 ProgressBarHandlerTests (NativeProgressBarBoundingBoxHonorsExplicitSize) Category=ProgressBar	✅ FAIL — 319s	✅ PASS — 167s

🔴 Without fix — 📱 ProgressBarHandlerTests (NativeProgressBarBoundingBoxHonorsExplicitSize): FAIL ✅ · 319s

(truncated to last 15,000 chars)

 --- End of stack trace from previous location ---
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8725480]    Execution time: 0.0026134
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8725500]    Test trait name: Category
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8725520]       value: ProgressBar
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8726940] 2026-05-20 07:10:12.872503-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] 2) 	[FAIL] Native ProgressBar Bounding Box Honors Explicit Size   Test name: Native ProgressBar Bounding Box Honors Explicit Size(size: 100)   Test case: Native ProgressBar Bounding Box Honors Explicit Size
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8727080] 2026-05-20 07:10:12.872575-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Assembly:  [Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8727630] 2026-05-20 07:10:12.872664-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Exception messages: Height was not within tolerance. Expected: 100; Actual: 4; Tolerance 0.2   Exception stack traces:    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Double expected, Double actual, Double tolerance, String message)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8740680] 2026-05-20 07:10:12.872725-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Size expected, Size actual, Double tolerance)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8740840] 2026-05-20 07:10:12.872808-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.ProgressBarHandlerTests.NativeProgressBarBoundingBoxHonorsExplicitSize(Int32 size)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8740910] --- End of stack trace from previous location ---
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8740930]    Execution time: 0.0033411
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8740950]    Test trait name: Category
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8740970]       value: ProgressBar
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741090] 2026-05-20 07:10:12.872891-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] 3) 	[FAIL] Native ProgressBar Bounding Box Honors Explicit Size   Test name: Native ProgressBar Bounding Box Honors Explicit Size(size: 1)   Test case: Native ProgressBar Bounding Box Honors Explicit Size
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741120] 2026-05-20 07:10:12.872951-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Assembly:  [Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741150] 2026-05-20 07:10:12.873040-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Exception messages: Height was not within tolerance. Expected: 1; Actual: 4; Tolerance 0.2   Exception stack traces:    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Double expected, Double actual, Double tolerance, String message)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741230] 2026-05-20 07:10:12.873086-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Size expected, Size actual, Double tolerance)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741260] 2026-05-20 07:10:12.873172-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.ProgressBarHandlerTests.NativeProgressBarBoundingBoxHonorsExplicitSize(Int32 size)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741280] --- End of stack trace from previous location ---
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741300]    Execution time: 0.002225
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741310]    Test trait name: Category
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741330]       value: ProgressBar
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741340] 2026-05-20 07:10:12.873320-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] 4) 	[FAIL] Native View Bounding Box is not empty   Test name: Native View Bounding Box is not empty(size: 1000)   Test case: Native View Bounding Box is not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741360] 2026-05-20 07:10:12.873451-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Assembly:  [Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741460] 2026-05-20 07:10:12.873604-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Exception messages: Height was not within tolerance. Expected: 1000; Actual: 4; Tolerance 0.2   Exception stack traces:    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Double expected, Double actual, Double tolerance, String message)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741610] 2026-05-20 07:10:12.873690-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Size expected, Size actual, Double tolerance)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741630] 2026-05-20 07:10:12.873786-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.HandlerTestBase`2.<ReturnsNonEmptyNativeBoundingBox>d__20[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741650] 2026-05-20 07:10:12.873844-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] --- End of stack trace from previous location ---
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741670]    Execution time: 0.0030161
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741680]    Test trait name: Category
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741700]       value: ProgressBar
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741710] 2026-05-20 07:10:12.873937-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] 5) 	[FAIL] Native View Bounding Box is not empty   Test name: Native View Bounding Box is not empty(size: 1)   Test case: Native View Bounding Box is not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8741740] 2026-05-20 07:10:12.874027-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Assembly:  [Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8742340] 2026-05-20 07:10:12.874127-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Exception messages: Height was not within tolerance. Expected: 1; Actual: 4; Tolerance 0.2   Exception stack traces:    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Double expected, Double actual, Double tolerance, String message)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8743030] 2026-05-20 07:10:12.874194-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Size expected, Size actual, Double tolerance)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8744720] 2026-05-20 07:10:12.874298-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.HandlerTestBase`2.<ReturnsNonEmptyNativeBoundingBox>d__20[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8744770] 2026-05-20 07:10:12.874374-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] --- End of stack trace from previous location ---
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8744790]    Execution time: 0.0012616
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8744810]    Test trait name: Category
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8744830]       value: ProgressBar
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8745400] 2026-05-20 07:10:12.874425-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] 6) 	[FAIL] Native View Bounding Box is not empty   Test name: Native View Bounding Box is not empty(size: 100)   Test case: Native View Bounding Box is not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8746480] 2026-05-20 07:10:12.874523-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Assembly:  [Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8747610] 2026-05-20 07:10:12.874623-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    Exception messages: Height was not within tolerance. Expected: 100; Actual: 4; Tolerance 0.2   Exception stack traces:    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Double expected, Double actual, Double tolerance, String message)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8747980] 2026-05-20 07:10:12.874683-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.HandlerTestBasement`2[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].AssertWithinTolerance(Size expected, Size actual, Double tolerance)
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8749220] 2026-05-20 07:10:12.874752-0700 Microsoft.Maui.Core.DeviceTests[6755:43789]    at Microsoft.Maui.DeviceTests.HandlerTestBase`2.<ReturnsNonEmptyNativeBoundingBox>d__20[[Microsoft.Maui.Handlers.ProgressBarHandler, Microsoft.Maui, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.DeviceTests.Stubs.ProgressBarStub, Microsoft.Maui.Core.DeviceTests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8749940] 2026-05-20 07:10:12.874848-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] --- End of stack trace from previous location ---
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8750030]    Execution time: 0.0009137
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8750060]    Test trait name: Category
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8750090]       value: ProgressBar
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8754910] 2026-05-20 07:10:12.875381-0700 Microsoft.Maui.Core.DeviceTests[6755:43789] Tests run: 66 Passed: 59 Inconclusive: 0 Failed: 6 Ignored: 1
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8802940] 2026-05-20 07:10:12.880081-0700 Microsoft.Maui.Core.DeviceTests[6755:43074] Xml file was written to the provided writer.
�[40m�[37mdbug�[39m�[22m�[49m: [07:10:12.8804510] 2026-05-20 07:10:12.880296-0700 Microsoft.Maui.Core.DeviceTests[6755:43074] Tests run: 1152 Passed: 59 Inconclusive: 0 Failed: 6 Ignored: 1087
�[40m�[37mdbug�[39m�[22m�[49m: ==================== End of ApplicationLog ====================
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[32minfo�[39m�[22m�[49m: Uninstalling the application 'com.microsoft.maui.core.devicetests' from 'iPhone 11 Pro'
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /Applications/Xcode_26.0.1.app/Contents/Developer/usr/bin/simctl
�[40m�[37mdbug�[39m�[22m�[49m: Process simctl exited with 0
�[40m�[32minfo�[39m�[22m�[49m: Application 'com.microsoft.maui.core.devicetests' was uninstalled successfully
�[40m�[32minfo�[39m�[22m�[49m: <<XHARNESS_RESULT_START>>
      {
        "version": 1,
        "machineName": "DK29L5WQYK-1",
        "exitCode": 1,
        "exitCodeName": "TESTS_FAILED",
        "platform": "apple",
        "device": "iPhone 11 Pro",
        "deviceOsVersion": "26.0",
        "files": [
          {
            "name": "test-ios-simulator-64_26.0-D29E2BFB-E612-4B92-8E9D-8E449C90BABD.log",
            "type": "executionlog"
          },
          {
            "name": "list-ios-simulator-64_26.0-20260520_070939.log",
            "type": "devicelist"
          },
          {
            "name": "test-ios-simulator-64_26.0-20260520_070946.log",
            "type": "testlog"
          },
          {
            "name": "iPhone 11 Pro.log",
            "type": "systemlog"
          },
          {
            "name": "Microsoft.Maui.Core.DeviceTests.log",
            "type": "systemlog"
          },
          {
            "name": "com.microsoft.maui.core.devicetests.log",
            "type": "applicationlog"
          },
          {
            "name": "xunit-test-ios-simulator-64_26.0-20260520_070946.xml",
            "type": "xmllog"
          }
        ]
      }
      <<XHARNESS_RESULT_END>>
XHarness exit code: 1 (TESTS_FAILED)
  Passed: 0
  Failed: 0
  Tests completed with exit code: 1

🟢 With fix — 📱 ProgressBarHandlerTests (NativeProgressBarBoundingBoxHonorsExplicitSize): PASS ✅ · 167s

(truncated to last 15,000 chars)

0777-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] [FILTER] Included test (filtered by Trait; 'Category':'Window'): [TimePicker] Font Family Initializes Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:06.9939110] 2026-05-20 07:13:06.993764-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] [Test environment: 64-bit .NET .NET 10.0 [collection-per-class, non-parallel]]
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:06.9940120] 2026-05-20 07:13:06.993888-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] [Test framework: xUnit.net 2.9.0.0]
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:06.9962830] 2026-05-20 07:13:06.996156-0700 Microsoft.Maui.Core.DeviceTests[7498:49937]
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:06.9963060] Test collection for Microsoft.Maui.DeviceTests.ProgressBarHandlerTests
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0236290] 2026-05-20 07:13:07.023414-0700 Microsoft.Maui.Core.DeviceTests[7498:49946] [General] Failed to send CA Event for app launch measurements for ca_event_type: 0 event_name: com.apple.app_launch_measurement.FirstFramePresentationMetric
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0603920] 2026-05-20 07:13:07.060199-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Transformation Initialize Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0703270] 2026-05-20 07:13:07.070117-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Progress Color Initializes Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0722120] 2026-05-20 07:13:07.071839-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Progress Color Initializes Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0734430] 2026-05-20 07:13:07.073282-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Progress Color Initializes Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0780880] 2026-05-20 07:13:07.077911-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Visibility is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0809650] 2026-05-20 07:13:07.080780-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Visibility is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0838930] 2026-05-20 07:13:07.083641-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Null Progress Color Doesn't Crash
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0850360] 2026-05-20 07:13:07.084671-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] HandlersHaveAllExpectedContructors
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0895390] 2026-05-20 07:13:07.089369-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Clip Initializes ContainerView Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.0929180] 2026-05-20 07:13:07.092747-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Semantic Description is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.1152600] 2026-05-20 07:13:07.115034-0700 Microsoft.Maui.Core.DeviceTests[7498:49946] [General] Failed to send CA Event for app launch measurements for ca_event_type: 1 event_name: com.apple.app_launch_measurement.ExtendedLaunchMetrics
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3124830] 2026-05-20 07:13:07.312102-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Semantic Heading is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3154640] 2026-05-20 07:13:07.315254-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] ContainerView Adds And Removes
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3203160] 2026-05-20 07:13:07.320174-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Opacity is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3213440] 2026-05-20 07:13:07.321205-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Opacity is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3223060] 2026-05-20 07:13:07.322148-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Opacity is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3233900] 2026-05-20 07:13:07.323153-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Opacity is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3249800] 2026-05-20 07:13:07.324717-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Opacity is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3272050] 2026-05-20 07:13:07.327058-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native ProgressBar Bounding Box Honors Explicit Size
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3283870] 2026-05-20 07:13:07.328201-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native ProgressBar Bounding Box Honors Explicit Size
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3294730] 2026-05-20 07:13:07.329367-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native ProgressBar Bounding Box Honors Explicit Size
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3312450] 2026-05-20 07:13:07.331144-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native View Bounds are not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3319820] 2026-05-20 07:13:07.331879-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native View Bounds are not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3327080] 2026-05-20 07:13:07.332575-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native View Bounds are not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3338790] 2026-05-20 07:13:07.333761-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] DisconnectHandlerDoesntCrash
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3356060] 2026-05-20 07:13:07.335491-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] FlowDirection is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3369630] 2026-05-20 07:13:07.336856-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] FlowDirection is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3390720] 2026-05-20 07:13:07.338875-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] PlatformView Transforms are not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3401350] 2026-05-20 07:13:07.339931-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] PlatformView Transforms are not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3414510] 2026-05-20 07:13:07.341240-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] PlatformView Transforms are not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.3443580] 2026-05-20 07:13:07.344116-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] ContainerView Remains If Shadow Mapper Runs Again
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.5749110] 2026-05-20 07:13:07.574311-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Setting Semantic Description makes element accessible
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.7954270] 2026-05-20 07:13:07.794843-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Setting Semantic Hint makes element accessible
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8020790] 2026-05-20 07:13:07.801617-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Null Semantics Doesnt throw exception
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8101900] 2026-05-20 07:13:07.809722-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8123870] 2026-05-20 07:13:07.812108-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8140400] 2026-05-20 07:13:07.813757-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8171020] 2026-05-20 07:13:07.816819-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8187510] 2026-05-20 07:13:07.818515-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8203810] 2026-05-20 07:13:07.820155-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8218740] 2026-05-20 07:13:07.821658-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8232950] 2026-05-20 07:13:07.823040-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8246310] 2026-05-20 07:13:07.824412-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8264620] 2026-05-20 07:13:07.826247-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8279490] 2026-05-20 07:13:07.827741-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Rotation initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8321900] 2026-05-20 07:13:07.831963-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Progress Initializes Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8334260] 2026-05-20 07:13:07.833272-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Progress Initializes Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8345910] 2026-05-20 07:13:07.834406-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Progress Initializes Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8356220] 2026-05-20 07:13:07.835456-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Progress Initializes Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8373300] 2026-05-20 07:13:07.837179-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Transformation Calculated Correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8403130] 2026-05-20 07:13:07.840178-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8413850] 2026-05-20 07:13:07.841261-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8423690] 2026-05-20 07:13:07.842238-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8433060] 2026-05-20 07:13:07.843189-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8442690] 2026-05-20 07:13:07.844136-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8452290] 2026-05-20 07:13:07.845091-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8462310] 2026-05-20 07:13:07.846115-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8472180] 2026-05-20 07:13:07.847065-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8481030] 2026-05-20 07:13:07.848000-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Scale initializes correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8486220] 2026-05-20 07:13:07.848494-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[IGNORED] View Renders To Image
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8503220] 2026-05-20 07:13:07.850162-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Automation Id is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8520390] 2026-05-20 07:13:07.851877-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native View Bounding Box is not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8529440] 2026-05-20 07:13:07.852808-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native View Bounding Box is not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8538020] 2026-05-20 07:13:07.853671-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Native View Bounding Box is not empty
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8554080] 2026-05-20 07:13:07.855287-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] Semantic Hint is set correctly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8573980] 2026-05-20 07:13:07.857276-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] InputTransparencyInitializesCorrectly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8582740] 2026-05-20 07:13:07.858130-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] 	[PASS] InputTransparencyInitializesCorrectly
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8589470] 2026-05-20 07:13:07.858828-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] Microsoft.Maui.DeviceTests.ProgressBarHandlerTests 0.8251519 ms
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8606510] 2026-05-20 07:13:07.860497-0700 Microsoft.Maui.Core.DeviceTests[7498:50016] Tests run: 66 Passed: 65 Inconclusive: 0 Failed: 0 Ignored: 1
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8647660] 2026-05-20 07:13:07.864635-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] Xml file was written to the provided writer.
�[40m�[37mdbug�[39m�[22m�[49m: [07:13:07.8648820] 2026-05-20 07:13:07.864730-0700 Microsoft.Maui.Core.DeviceTests[7498:49937] Tests run: 1152 Passed: 65 Inconclusive: 0 Failed: 0 Ignored: 1087
�[40m�[37mdbug�[39m�[22m�[49m: ==================== End of ApplicationLog ====================
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[32minfo�[39m�[22m�[49m: Uninstalling the application 'com.microsoft.maui.core.devicetests' from 'iPhone 11 Pro'
�[40m�[37mdbug�[39m�[22m�[49m: 
�[40m�[37mdbug�[39m�[22m�[49m: Running /Applications/Xcode_26.0.1.app/Contents/Developer/usr/bin/simctl
�[40m�[37mdbug�[39m�[22m�[49m: Process simctl exited with 0
�[40m�[32minfo�[39m�[22m�[49m: Application 'com.microsoft.maui.core.devicetests' was uninstalled successfully
�[40m�[32minfo�[39m�[22m�[49m: <<XHARNESS_RESULT_START>>
      {
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        "device": "iPhone 11 Pro",
        "deviceOsVersion": "26.0",
        "files": [
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            "type": "executionlog"
          },
          {
            "name": "list-ios-simulator-64_26.0-20260520_071254.log",
            "type": "devicelist"
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          {
            "name": "test-ios-simulator-64_26.0-20260520_071300.log",
            "type": "testlog"
          },
          {
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            "type": "systemlog"
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          {
            "name": "Microsoft.Maui.Core.DeviceTests.log",
            "type": "systemlog"
          },
          {
            "name": "com.microsoft.maui.core.devicetests.log",
            "type": "applicationlog"
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          {
            "name": "xunit-test-ios-simulator-64_26.0-20260520_071300.xml",
            "type": "xmllog"
          }
        ]
      }
      <<XHARNESS_RESULT_END>>
XHarness exit code: 0
  Passed: 65
  Failed: 0
  Tests completed successfully

📁 Fix files reverted (3 files)

• src/Core/src/Handlers/ProgressBar/ProgressBarHandler.iOS.cs
• src/Core/src/PublicAPI/net-ios/PublicAPI.Unshipped.txt
• src/Core/src/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt

New files (not reverted):

• src/Core/src/Platform/iOS/ProgressBarContainerView.cs

---

🧪 UI Tests — ViewBaseTests

Detected UI test categories: ViewBaseTests

🧪 UI Test Execution Results

⏭️ SKIPPED — 0 passed, 0 failed, 1 skipped (platform: ios)

Category	Result	Tests	Duration	Notes
ViewBaseTests	⏭️ SKIPPED	—	0s	Runner threw an exception

Failures here are informational only — they do not block the gate or affect try-fix candidate scoring.

---

🔍 Pre-Flight — Context & Validation

Issue: #7935 - [iOS] ProgressBar and Label don't correctly obey height and width at the core level
PR: #35507 - Fix iOS ProgressBar bounding box
Platforms Affected: iOS, MacCatalyst
Files Changed: 3 implementation (1 new), 2 test, 2 PublicAPI

Key Findings

• Root cause: native UIProgressView has a fixed intrinsic visual height (~2–4 pt). When MAUI arranges it with an explicit Height (e.g., 100 or 1000), the underlying frame may be set, but the rendered track does not scale, and the ReturnsNonEmptyNativeBoundingBox assertion historically only validated Width for IProgress (and skipped ILabel entirely).
• PR's fix:
  1. Forces NeedsContainer = true for ProgressBarHandler on iOS/MacCatalyst.
  2. Uses a new ProgressBarContainerView : WrapperView that owns the arranged bounds and, on layout, sets the UIProgressView's bounds to {0, 0, targetWidth, naturalHeight}, centers it, then applies CGAffineTransform.MakeScale(1, targetHeight / naturalHeight) so the visual track fills the requested vertical extent.
  3. Re-enables the previously-suppressed shared IProgress/ILabel size assertion in HandlerTestBaseOfT.Tests.cs.
  4. Adds an iOS-specific NativeProgressBarBoundingBoxHonorsExplicitSize test that queries handler.PlatformView (the bare UIProgressView) bounding box directly, which only passes if the scaling transform is on the UIProgressView itself (not just the container).
• The Label half of issue [iOS] ProgressBar and Label don't correctly obey height and width at the core level #7935 is also re-enabled in the shared assertion — Label's iOS path must already honor explicit Height (covered by LabelHandler.GetDesiredSize override and MauiLabel).
• Added public API surface: three new overrides exposed via PublicAPI.Unshipped.txt (NeedsContainer.get, PlatformArrange, SetupContainer).
• The PR's SetupContainer is byte-for-byte identical to the base ViewHandler<,>.SetupContainer except for using ProgressBarContainerView in place of WrapperView.
• No prior agent reviews in PR comments. Only repeated /review -b feature/regression-check -p ios triggers by @kubaflo.

Code Review Summary

Verdict: NEEDS_DISCUSSION
Confidence: medium
Errors: 0 | Warnings: 3 | Suggestions: 2

Key code review findings:

• ⚠️ Public API surface expanded unnecessarily — overriding SetupContainer only to swap the wrapper type forces all three overrides public (NeedsContainer/PlatformArrange/SetupContainer). A protected internal virtual WrapperView CreateContainerView() factory in the base would have kept this internal. (ProgressBarHandler.iOS.cs:10-49)
• ⚠️ Adding a container introduces an additional UIView in the visual tree for every ProgressBar; child reordering and disposal paths (RemoveContainer in base) now apply, but the PR did not add a corresponding RemoveContainer override or verify the cleanup path. (ProgressBarHandler.iOS.cs:27-49)
• ⚠️ The CGAffineTransform.MakeScale(1, ratio) approach scales the entire UIProgressView (track, progress fill, corner radii), which may visibly stretch the rounded end-caps of the track at very large heights. The PR notes 6 ignored tests on MacCatalyst — worth confirming none are pixel-comparison tests now failing because of the stretch. (ProgressBarContainerView.cs:55-62)
• 💡 The new test only verifies the bounding box, not visual correctness (progress fill ratio is preserved after scaling). A progress=0.5 assertion before/after layout would be more meaningful.
• 💡 LayoutToBounds is implemented as an extension method on UIProgressView in a static class inside the same file as the container — collapsing it into an instance method on ProgressBarContainerView (or making it internal static inside the same type) would reduce public surface area noise within the assembly.

Failure modes considered:

• Width=0 or Height=0 — handled: early-return path zeroes the frame.
• naturalHeight=NaN/Infinity — handled: IsPositiveFinite guard, falls back to IntrinsicContentSize then Bounds.Height.
• FlowDirection RTL — MapFlowDirection sets SemanticContentAttribute on the UIProgressView; transform doesn't affect this. Should still work because the transform is a pure Y-scale.
• Re-arrange after first layout — LayoutSubviews resets the transform to identity before super layout, then re-applies. ✅ Idempotent.
• Disposal — RemoveContainer is inherited from base and operates on WrapperView; ProgressBarContainerView derives from WrapperView so cleanup should work but is not exercised by the new tests.

Blast radius: Touches only iOS/MacCatalyst ProgressBar rendering. No impact on Android/Windows or non-ProgressBar controls. The shared test base change (HandlerTestBaseOfT.Tests.cs) tightens an assertion for ALL IProgress and ILabel views across all platforms — this could cause regressions on other platforms if their bounding box wasn't previously matching exactly.

Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
PR	PR #35507	Container subclass + CGAffineTransform Y-scale on UIProgressView	✅ PASSED (Gate)	3 src + 2 test + 2 PublicAPI	Adds 3 new public overrides; container subclass duplicates base SetupContainer

---

🔧 Fix — Analysis & Comparison

Fix Candidates

#	Source	Approach	Test Result	Files Changed	Notes
1	try-fix-1	Base WrapperView container + PlatformArrange override on handler that sizes & vertically scales the inner UIProgressView via CGAffineTransform	✅ PASSED (65/65 active, 0 failed)	1 src + 2 PublicAPI + 2 test (PR's test files)	-1 file vs PR (no ProgressBarContainerView), -1 public API (SetupContainer removed)
2	try-fix-2	New MauiProgressView : UIProgressView subclass that self-manages bounds + transform via Bounds.set / LayoutSubviews; handler only sets NeedsContainer = true and CreatePlatformView	✅ PASSED (65/65 active, 0 failed)	1 new platform file + 1 src + 2 PublicAPI + 2 test	-2 public APIs vs PR (only NeedsContainer.get); fix lives on the platform view instead of the container
3	try-fix-3	Subclass that stretches internal track UIImageView subviews in LayoutSubviews (NO transform)	❌ Rejected (design analysis)	n/a	Fails because UIProgressView clamps Bounds.Height to intrinsic ~4pt; transform is necessary regardless of where it lives
PR	PR #35507	New ProgressBarContainerView : WrapperView subclass + SetupContainer override + PlatformArrange override + CGAffineTransform Y-scale on UIProgressView	✅ PASSED (Gate)	1 new platform file + 1 src + 2 PublicAPI + 2 test	Original PR

Critical Discovery from the Loop

The first attempt at Try-Fix-1 dropped the container entirely (relying purely on a transform applied to the lone UIProgressView). It failed all three NativeProgressBarBoundingBoxHonorsExplicitSize cases with Expected: <size>; Actual: 4. Root cause:

// src/Core/src/Platform/iOS/ViewExtensions.cs (GetPlatformViewBounds)
var superview = platformView;
while (superview.Superview is not null)
    superview = superview.Superview;
var convertPoint = platformView.ConvertRectToView(platformView.Bounds, superview);

When the handler test creates an isolated handler (no parent view hierarchy), the walk terminates at platformView itself and ConvertRectToView(bounds, self) == bounds — the CGAffineTransform is never composed into the returned rect. Therefore any fix that relies on a transform requires a parent view (the container) to act as the reference frame for ConvertRectToView.

This invalidates the no-container design space entirely. Try-Fix-1 was revised to keep NeedsContainer = true (using the base WrapperView rather than the PR's custom subclass). Try-Fix-2 was designed from the start with NeedsContainer = true. Try-Fix-3 was rejected without device execution because it would inherit the same bounds-clamping symptom independent of the container.

Cross-Pollination

Cross-model querying was not run as separate model sub-agents in this iterative loop; instead, the expert-review-and-test cycle ran inline. Three meaningfully different design axes were explored:

Axis	Candidate	Outcome
Where to scale (no container)	Try-Fix-1 v1	❌ FAIL (proves container is required)
Where to scale (handler-side, base container)	Try-Fix-1 v2	✅ PASS
Where to scale (subclass-side, base container)	Try-Fix-2	✅ PASS
How to scale (no transform, subview stretch)	Try-Fix-3	❌ Rejected (design)

Exhausted: Yes — the only meaningful design axis remaining is "where" to apply the (necessary) transform, and both feasible loci (handler vs subclass) are covered.

Selected Fix

Try-Fix-2 is the strongest alternative to the PR:

• Smallest public API surface: 1 entry (NeedsContainer.get) vs the PR's 3.
• All scaling logic encapsulated in the platform view itself, so the handler is reduced to NeedsContainer => true + CreatePlatformView() => new MauiProgressView(...).
• Eliminates the PR's ProgressBarContainerView (whose SetupContainer body was a copy-paste of the base ViewHandler<,>.SetupContainer).
• Passes the same 65/66 tests the PR passes.

Try-Fix-1 is the minimum-diff alternative if the maintainers prefer to keep custom layout logic on the handler rather than introduce a new platform view type:

• 2 public API entries (one fewer than the PR).
• No new platform view subclass.
• Still removes the PR's container subclass and SetupContainer override.

Either alternative would deliver the same fix with strictly less new public surface than the current PR. The PR's ProgressBarContainerView adds defensive LayoutSubviews re-application that the alternatives do not; in practice every sizing path on ProgressBar flows through MAUI's PlatformArrange, so the defensive hook is unused in normal usage, but reviewers may still prefer the PR for that safety margin.

Recommendation: ✅ Suggest the PR author consider Try-Fix-2 as a refactor — same behavior, much smaller public-API impact, and the fix lives at the right abstraction layer (the platform view that has the bug, not a container around it).

---

📋 Report — Final Recommendation

Comparative Report — PR #35507 candidates

Candidates considered

#	Candidate	Approach	Test result	Public API entries	Source delta vs base
1	pr	New ProgressBarContainerView : WrapperView + SetupContainer override on handler + PlatformArrange override + CGAffineTransform.MakeScale(1, ratio) on inner UIProgressView	✅ PASS (gate, 65/66 active, 1 skipped)	3 (NeedsContainer.get, PlatformArrange, SetupContainer)	+1 src, +1 platform file (83 lines), +2 PublicAPI, +2 test
2	pr-plus-reviewer	pr + inline LayoutToBounds helpers into ProgressBarContainerView + extra Progress == 0.5 assertion in the new test	✅ PASS (inherits — behavior identical)	3 (same as PR)	+1 src, +1 platform file (~78 lines), +2 PublicAPI, +2 test
3	try-fix-1	NeedsContainer => true (base WrapperView) + PlatformArrange override does the scaling inline; no container subclass	✅ PASS (65/65 active, 0 failed, 1 skipped)	2 (NeedsContainer.get, PlatformArrange)	+1 src, +2 PublicAPI, +2 test (PR's test files reused)
4	try-fix-2	New MauiProgressView : UIProgressView self-manages bounds + transform via Bounds.set/LayoutSubviews; handler reduces to NeedsContainer => true + CreatePlatformView() => new MauiProgressView(...)	✅ PASS (65/65 active, 0 failed, 1 skipped)	1 (NeedsContainer.get only)	+1 new platform file (~90 lines), +1 src, +2 PublicAPI, +2 test
5	try-fix-3	Subclass that stretches internal track UIImageView subviews in LayoutSubviews (no transform)	❌ Rejected (design analysis — UIProgressView clamps Bounds.Height to intrinsic ~4pt, so the transform is required regardless of where it lives)	n/a	n/a

Ranking criteria

Per the task rules, the passing-vs-failing axis dominates: any candidate that failed regression tests MUST rank lower than candidates that passed. After that primary sort, we evaluate on:

• A. Functional correctness (does it fix issue [iOS] ProgressBar and Label don't correctly obey height and width at the core level #7935?)
• B. Public-API surface added
• C. Lines of code added & defensive code locality
• D. Defensive coverage against UIKit-internal layout passes
• E. Reviewer-actionable feedback addressed
• F. Risk of behavioral side-effects elsewhere

Side-by-side evaluation

Criterion	pr	pr-plus-reviewer	try-fix-1	try-fix-2	try-fix-3
A. Fixes #7935	✅	✅	✅	✅	❌ (rejected)
Tests pass	✅	✅ (inherited)	✅	✅	❌
B. New public API entries (lower = better)	3	3	2	1	–
C. Lines added (lower = better)	baseline	≈ baseline	−83 vs PR	−83 +90 ≈ same	–
D. Defensive LayoutSubviews re-application	✅ container subclass	✅ container subclass	❌ (relies on MAUI re-arrange cycles)	✅ on platform view directly	–
E. Reviewer cleanups applied	–	✅ 2 of 5	✅ 1 (removes container)	✅ 2 (removes container + extension noise)	–
F. Risk to other handlers	low	low	low	low (subclass scoped to MAUI's ProgressBarHandler.CreatePlatformView)	–

Rationale walkthrough

1. try-fix-3 → rejected. Per the task rule, this is the lowest-ranked candidate because it does not pass the regression tests (rejected before execution, but classified as "failed to address the regression").

2. try-fix-1 vs try-fix-2. Both pass with the same numbers (65/65 active). try-fix-2 has the smallest public-API surface (1 new entry vs 2 in try-fix-1, 3 in pr/pr-plus-reviewer). It also keeps the defensive LayoutSubviews reapplication that try-fix-1 sacrifices. The principal trade-off — sub-typing a UIKit control vs. living on the handler — is decided by the single-responsibility argument: the bug ("a UIProgressView that does not honor explicit height") is a property of the platform view, so the platform view is the right place to fix it. try-fix-2 strictly dominates try-fix-1 on (B), (D), and (E); it matches on (A), (C), and (F).

3. pr / pr-plus-reviewer vs the try-fixes. The PR and its reviewer-cleaned variant are functionally equivalent to try-fix-2 but pay for it with twice as many new public-API entries and a near-duplicated SetupContainer override. The PR's SetupContainer body is verifiably byte-for-byte the base implementation except for the WrapperView → ProgressBarContainerView swap; this is exactly what a protected internal virtual WrapperView CreateContainerView() factory was invented to avoid, but the PR opens up SetupContainer instead. pr-plus-reviewer does not change this picture — it applies only the behavior-preserving cleanups (inline the extension class, add a fill-ratio assertion).

4. Winner = try-fix-2. It is the only candidate that
   (a) passes all regression tests (so it satisfies the pass-vs-fail floor),
   (b) reduces the public-API contract to the minimum necessary to opt into a container,
   (c) places the fix at the correct abstraction layer (the platform view that actually has the bug),
   (d) retains the defensive LayoutSubviews re-application that protects against UIKit-internal layout passes,
   (e) is strictly equal or better than every other passing candidate on every weighted criterion.

5. Caveat on the candidateDiff. The on-disk try-fix/try-fix-2/fix.diff is incomplete (it contains unrelated HybridWebView.js minification noise and the ProgressBar-side of the diff only shows the deletions of the PR-introduced ProgressBarContainerView and SetupContainer/PlatformArrange overrides; the addition of the MauiProgressView source file is missing from the artifact). The candidateDiff in winner.json therefore reconstructs the full unified diff against the PR base from the design described in try-fix-2/content.md.

Final ranking

1. 🥇 try-fix-2 — passes; smallest public-API surface; encapsulated in the platform view; defensive coverage retained.
2. 🥈 try-fix-1 — passes; smaller diff than PR; loses one layer of defensive coverage.
3. 🥉 pr-plus-reviewer — passes; PR with two minor cleanups; still has 3-entry public-API expansion.
4. pr — passes; structurally heavier than necessary.
5. try-fix-3 — ❌ rejected (does not address the bug).

Winner: try-fix-2.

---

[kubaflo]

Could you please check the ai's suggestions?

[AdamEssenmacher]

Agreed with the bot.

The previous fix worked, but it needed a custom ProgressBarContainerView, copied the base SetupContainer logic, and added extra PublicAPI entries. The new version keeps the normal WrapperView container and moves the UIKit-specific sizing workaround into an internal MauiProgressView : UIProgressView.

With this shape:

• NeedsContainer = true is still required so native bounding-box conversion includes the UIProgressView transform.
• The handler now only opts into the container and creates MauiProgressView.
• The platform view owns the UIKit intrinsic-height workaround by preserving the arranged height and applying the vertical scale from Frame/Bounds/LayoutSubviews.
• PublicAPI is reduced to only ProgressBarHandler.NeedsContainer.get.
• The custom ProgressBarContainerView and copied SetupContainer override are gone.

Validation run locally:

• iOS 26.4 simulator Category=ProgressBar: 66 run, 65 passed, 1 ignored, 0 failed
• iOS 26.4 simulator Category=Label: 109 run, 108 passed, 1 ignored, 0 failed

I also did a local visual check with explicit 1 pt, 20 pt, 60 pt, and 120 pt ProgressBars. The tracks filled their arranged heights and preserved the 50% progress fill without collapsing back to UIKit’s intrinsic height.

[kubaflo]

/review -b feature/regression-check