Fix for GetPosition truncates fractional coordinates to integers In OnTapped Event on iOS and MacCatalyst

src/Controls/src/Core/Platform/GestureManager/GesturePlatformManager.iOS.cs

@@ -194,7 +194,7 @@ static void ProcessRecognizerHandlerTap(
 			if (platformRecognizer == null)
 			{
 				if (virtualView == element)
-					return new Point((int)originPoint.X, (int)originPoint.Y);
+					return new Point(originPoint.X, originPoint.Y);
 
 				var targetViewScreenLocation = virtualView.GetLocationOnScreen();
 
@@ -229,7 +229,7 @@ static void ProcessRecognizerHandlerTap(
 			if (result == null)
 				return null;
 
-			return new Point((int)result.Value.X, (int)result.Value.Y);
+			return new Point(result.Value.X, result.Value.Y);
 		}
 
 		protected virtual List<UIGestureRecognizer?>? GetPlatformRecognizer(IGestureRecognizer recognizer)

src/Controls/tests/TestCases.HostApp/Issues/Issue35943.cs

@@ -0,0 +1,98 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 35943, "[iOS, MacCatalyst] GetPosition Truncates Fractional Coordinates to Integers on TappedEvent", PlatformAffected.iOS)]
+public class Issue35943 : ContentPage
+{
+	public Issue35943()
+	{
+		// A half-point left/top margin places this view at a fractional UIKit position (X=0.5, Y=0.5
+		// relative to the container). Any tap at an integer screen coordinate will therefore produce
+		// fractional coordinates when expressed in this view's local coordinate system.
+		var referenceBox = new BoxView
+		{
+			Color = Colors.CornflowerBlue,
+			WidthRequest = 10,
+			HeightRequest = 10,
+			HorizontalOptions = LayoutOptions.Start,
+			Margin = new Thickness(0.5, 0.5, 0, 0),
+			AutomationId = "ReferenceBox"
+		};
+
+		var instructionLabel = new Label
+		{
+			Text = "Tap the red box. Coordinates relative to the blue box should be fractional.",
+			AutomationId = "InstructionLabel"
+		};
+
+		// resultLabel shows human-readable output; statusLabel holds the AutomationId the test waits for.
+		// They are separate because AutomationId may only be set once on iOS/MacCatalyst.
+		var resultLabel = new Label
+		{
+			Text = "Tap the red box",
+			AutomationId = "ResultLabel"
+		};
+
+		var statusLabel = new Label { Text = string.Empty };
+
+		var tapTarget = new BoxView
+		{
+			Color = Colors.Tomato,
+			WidthRequest = 200,
+			HeightRequest = 200,
+			HorizontalOptions = LayoutOptions.Start,
+			AutomationId = "TapTarget"
+		};
+
+		var tapGesture = new TapGestureRecognizer();
+		tapGesture.Tapped += (s, e) =>
+		{
+			var position = e.GetPosition(relativeTo: referenceBox);
+
+			if (position is null)
+			{
+				resultLabel.Text = "Failure: position is null";
+				if (string.IsNullOrEmpty(statusLabel.AutomationId))
+					statusLabel.AutomationId = "Failure";
+				statusLabel.Text = "Failure";
+				return;
+			}
+
+			// Because referenceBox is at a fractional UIKit position (Margin = 0.5),
+			// GetPosition(relativeTo: referenceBox) should return coordinates with
+			// a fractional component. Before the fix, the (int) cast in CalculatePosition
+			// would truncate e.g. 99.5 → 99, losing sub-pixel precision.
+			double fracX = Math.Abs(position.Value.X - Math.Truncate(position.Value.X));
+			double fracY = Math.Abs(position.Value.Y - Math.Truncate(position.Value.Y));
+			bool hasFractionalPrecision = fracX > 0.01 || fracY > 0.01;
+
+			if (hasFractionalPrecision)
+			{
+				resultLabel.Text = $"Success: X={position.Value.X:F4}, Y={position.Value.Y:F4}";
+				if (string.IsNullOrEmpty(statusLabel.AutomationId))
+					statusLabel.AutomationId = "Success";
+				statusLabel.Text = "Success";
+			}
+			else
+			{
+				resultLabel.Text = $"Failure: X={position.Value.X}, Y={position.Value.Y} (expected fractional coordinates)";
+				if (string.IsNullOrEmpty(statusLabel.AutomationId))
+					statusLabel.AutomationId = "Failure";
+				statusLabel.Text = "Failure";
+			}
+		};
+
+		tapTarget.GestureRecognizers.Add(tapGesture);
+
+		Content = new VerticalStackLayout
+		{
+			Children =
+			{
+				instructionLabel,
+				referenceBox,
+				tapTarget,
+				resultLabel,
+				statusLabel
+			}
+		};
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue35943.cs

@@ -0,0 +1,30 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue35943 : _IssuesUITest
+	{
+		public Issue35943(TestDevice device) : base(device) { }
+
+		public override string Issue => "[iOS, MacCatalyst] GetPosition Truncates Fractional Coordinates to Integers on TappedEvent";
+
+		[Test]
+		[Category(UITestCategories.Gestures)]
+		public void GetPositionPreservesFractionalCoordinates()
+		{
+			// The tap target is a BoxView. The reference box (ReferenceBox) has a 0.5-point
+			// margin, placing it at a fractional UIKit coordinate. GetPosition(relativeTo: ReferenceBox)
+			// should therefore return coordinates with a fractional component.
+			// Before the fix, an explicit (int) cast in CalculatePosition truncated these values.
+			App.WaitForElement("TapTarget");
+
+			App.Tap("TapTarget");
+
+			// "Success" appears when the coordinates have a fractional component;
+			// "Failure" appears when they are truncated to integers.
+			App.WaitForElement("Success");
+		}
+	}
+}