[iOS] Fix for Flyout title is not broken over multiple lines when you rotate your screen. (#29171)

* fix-15154-Added proper Auto Layout constraints to ensure content wraps instead of truncating in landscape mode.

* fix-15154-Prepared the testcase and snapshot added for android and iOS.

* fix-15154-Modified the test condition.

* fix-15154-Modified the code to align the edges of ContentView with the edges of platformView.

* fix-15154-Adjusted inset constraints to respect view margins in FlyoutItem and updated Android snapshot.

* fix-15154-Replaced individual .Active=true calls with batch NSLayoutConstraint.ActivateConstraints() for better performance with Shell flyout margins.

Author: BagavathiPerumal

src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/UIContainerCell.cs

@@ -31,6 +31,17 @@ internal UIContainerCell(string cellId, View view, Shell shell, object context)
 			var platformView = view.ToPlatform();
 			ContentView.AddSubview(platformView);
 			platformView.AccessibilityTraits |= UIAccessibilityTrait.Button;
+			platformView.TranslatesAutoresizingMaskIntoConstraints = false;
+
+			var margin = view.Margin;
+			var constraints = new NSLayoutConstraint[]
+			{
+				platformView.LeadingAnchor.ConstraintEqualTo(ContentView.LeadingAnchor, (nfloat)margin.Left),
+				platformView.TrailingAnchor.ConstraintEqualTo(ContentView.TrailingAnchor, (nfloat)(-margin.Right)),
+				platformView.TopAnchor.ConstraintEqualTo(ContentView.TopAnchor, (nfloat)margin.Top),
+				platformView.BottomAnchor.ConstraintEqualTo(ContentView.BottomAnchor, (nfloat)(-margin.Bottom))
+			};
+			NSLayoutConstraint.ActivateConstraints(constraints);
 
 			_renderer.PlatformView.ClipsToBounds = true;
 			ContentView.ClipsToBounds = true;

src/Controls/tests/TestCases.Android.Tests/snapshots/android/ShouldFlyoutTextWrapsInLandscape.png

@@ -0,0 +1,74 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 15154, "iOS Flyout title is not broken over multiple lines when you rotate your screen", PlatformAffected.iOS)]
+public class Issue15154 : Shell
+{
+	public Issue15154()
+	{
+        this.Items.Add(new ShellContent
+        {
+            Title = "EmptyView Template with behavior with height",
+            ContentTemplate = new DataTemplate(typeof(Issue15154_MainPage))
+        });
+        
+        this.Items.Add(new ShellContent
+        {
+            Title = "EmptyView Template Grid",
+            ContentTemplate = new DataTemplate(typeof(Issue15154_MainPage))
+        });
+        
+        this.Items.Add(new ShellContent
+        {
+            Title = "EmptyView Template Grid with behavior with height",
+            ContentTemplate = new DataTemplate(typeof(Issue15154_MainPage))
+        });
+        
+        this.Items.Add(new ShellContent
+        {
+            Title = "EmptyView Template Grid with behavior without height",
+            ContentTemplate = new DataTemplate(typeof(Issue15154_MainPage))
+        });
+        
+        this.Items.Add(new ShellContent
+        {
+            Title = "EmptyView Text ScrollView",
+            ContentTemplate = new DataTemplate(typeof(Issue15154_MainPage))
+        });
+        
+        this.Items.Add(new ShellContent
+        {
+            Title = "EmptyView Template ScrollView",
+            ContentTemplate = new DataTemplate(typeof(Issue15154_MainPage))
+        });
+        
+        this.Items.Add(new ShellContent
+        {
+            Title = "EmptyView Text ScrollView with behavior with height",
+            ContentTemplate = new DataTemplate(typeof(Issue15154_MainPage))
+        });
+        
+        this.Items.Add(new ShellContent
+        {
+            Title = "EmptyView Text ScrollView without behavior with height",
+            ContentTemplate = new DataTemplate(typeof(Issue15154_MainPage))
+        });
+	}
+
+	public class Issue15154_MainPage : ContentPage
+	{
+		public Issue15154_MainPage()
+		{
+			var OpenFlyoutButton = new Button
+			{
+				Text = "Open Flyout",
+				AutomationId = "OpenFlyoutButton"
+			};
+
+			OpenFlyoutButton.Clicked += (sender, args) => Shell.Current.FlyoutIsPresented = true;
+			Content = new StackLayout()
+			{
+				Children = { OpenFlyoutButton }
+			};
+		}
+	}
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue15154.cs

@@ -0,0 +1,26 @@
+#if TEST_FAILS_ON_CATALYST && TEST_FAILS_ON_WINDOWS //The test fails on Windows and MacCatalyst because the SetOrientation method, which is intended to change the device orientation, is only supported on mobile platforms iOS and Android.
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue15154 : _IssuesUITest
+{
+	public Issue15154(TestDevice testDevice) : base(testDevice)
+	{
+	}
+
+	public override string Issue => "iOS Flyout title is not broken over multiple lines when you rotate your screen";
+
+	[Test]
+	[Category(UITestCategories.Shell)]
+	public void ShouldFlyoutTextWrapsInLandscape()
+	{
+		App.WaitForElement("OpenFlyoutButton");
+		App.Tap("OpenFlyoutButton");
+		App.SetOrientationLandscape();
+		VerifyScreenshot();
+	}
+}
+#endif