[iOS] Changing carousel view orientation with disabled loop - fix

src/Controls/src/Core/Handlers/Items/iOS/CarouselViewController.cs

@@ -32,6 +32,20 @@ public class CarouselViewController : ItemsViewController<CarouselView>
 
 		bool _isRotating;
 
+		public override void TraitCollectionDidChange(UITraitCollection previousTraitCollection)
+		{
+			if (previousTraitCollection.VerticalSizeClass == TraitCollection.VerticalSizeClass)
+			{
+				return;
+			}
+
+			if (ItemsView?.Loop == false || _carouselViewLoopManager is null)
+			{
+				CollectionView.ReloadData();
+				InitialPositionSet = false;
+			}
+		}
+
 		public CarouselViewController(CarouselView itemsView, ItemsViewLayout layout) : base(itemsView, layout)
 		{
 			CollectionView.AllowsSelection = false;

src/Controls/src/Core/PublicAPI/net-ios/PublicAPI.Unshipped.txt

@@ -68,6 +68,7 @@ Microsoft.Maui.Controls.HybridWebView.SetInvokeJavaScriptTarget<T>(T! target) ->
 ~Microsoft.Maui.Controls.Xaml.IXamlTypeResolver.Resolve(string qualifiedTypeName, System.IServiceProvider serviceProvider = null, bool expandToExtension = true) -> System.Type
 ~Microsoft.Maui.Controls.Xaml.RequireServiceAttribute.RequireServiceAttribute(System.Type[] serviceTypes) -> void
 ~Microsoft.Maui.Controls.Xaml.RequireServiceAttribute.ServiceTypes.get -> System.Type[]
+~override Microsoft.Maui.Controls.Handlers.Items.CarouselViewController.TraitCollectionDidChange(UIKit.UITraitCollection previousTraitCollection) -> void
 ~override Microsoft.Maui.Controls.Handlers.Items2.CarouselViewController2.CreateDelegator() -> UIKit.UICollectionViewDelegateFlowLayout
 ~override Microsoft.Maui.Controls.Handlers.Items2.CarouselViewController2.CreateItemsViewSource() -> Microsoft.Maui.Controls.Handlers.Items.IItemsViewSource
 ~override Microsoft.Maui.Controls.Handlers.Items2.CarouselViewController2.DetermineCellReuseId(Foundation.NSIndexPath indexPath) -> string

src/Controls/src/Core/PublicAPI/net-maccatalyst/PublicAPI.Unshipped.txt

@@ -68,6 +68,7 @@ Microsoft.Maui.Controls.HybridWebView.SetInvokeJavaScriptTarget<T>(T! target) ->
 ~Microsoft.Maui.Controls.Xaml.IXamlTypeResolver.Resolve(string qualifiedTypeName, System.IServiceProvider serviceProvider = null, bool expandToExtension = true) -> System.Type
 ~Microsoft.Maui.Controls.WebViewProcessTerminatedEventArgs.PlatformArgs.get -> Microsoft.Maui.Controls.PlatformWebViewProcessTerminatedEventArgs
 ~Microsoft.Maui.Controls.Xaml.RequireServiceAttribute.RequireServiceAttribute(System.Type[] serviceTypes) -> void
+~override Microsoft.Maui.Controls.Handlers.Items.CarouselViewController.TraitCollectionDidChange(UIKit.UITraitCollection previousTraitCollection) -> void
 ~Microsoft.Maui.Controls.Xaml.RequireServiceAttribute.ServiceTypes.get -> System.Type[]
 ~override Microsoft.Maui.Controls.Handlers.Items2.CarouselViewController2.CreateDelegator() -> UIKit.UICollectionViewDelegateFlowLayout
 ~override Microsoft.Maui.Controls.Handlers.Items2.CarouselViewController2.CreateItemsViewSource() -> Microsoft.Maui.Controls.Handlers.Items.IItemsViewSource

src/Controls/tests/TestCases.HostApp/Issues/Issue28523.xaml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Maui.Controls.Sample.Issues.Issue28523">
+    <CarouselView Loop="False">
+        <CarouselView.ItemTemplate>
+            <DataTemplate>
+                <Border StrokeShape="RoundRectangle 20"
+                        BackgroundColor="Red">
+                    <Label HorizontalOptions="Center"
+                           VerticalOptions="Center"
+                           AutomationId="{Binding}"
+                           Text="{Binding}"/>
+                </Border>
+            </DataTemplate>
+        </CarouselView.ItemTemplate>
+        <CarouselView.ItemsSource>
+            <x:Array Type="{x:Type x:String}">
+                <x:String>Baboon</x:String>
+                <x:String>Capuchin Monkey</x:String>
+                <x:String>Blue Monkey</x:String>
+                <x:String>Squirrel Monkey</x:String>
+                <x:String>Golden Lion Tamarin</x:String>
+                <x:String>Howler Monkey</x:String>
+            </x:Array>
+        </CarouselView.ItemsSource>
+    </CarouselView>
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue28523.xaml.cs

@@ -0,0 +1,11 @@
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 28523, "Different behavior on iOS and Android when Loop = False", PlatformAffected.iOS)]
+	public partial class Issue28523 : ContentPage
+	{
+		public Issue28523()
+		{
+			InitializeComponent();
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue28523.cs

@@ -0,0 +1,25 @@
+#if ANDROID || IOS
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+public class Issue28523 : _IssuesUITest
+{
+	public Issue28523(TestDevice testDevice) : base(testDevice)
+	{
+	}
+
+	public override string Issue => "Different behavior on iOS and Android when Loop = False";
+
+	[Test]
+	[Category(UITestCategories.CarouselView)]
+	public void CarouselViewItemShouldScaleProperly()
+	{
+		App.WaitForElement("Baboon");
+		App.SetOrientationLandscape();
+		App.WaitForElement("Baboon");
+		VerifyScreenshot();
+	}
+}
+#endif