[iOS] Fixed the crash occurred on CarouselView2 when deleting last one remaining item with loop as false

src/Controls/src/Core/Handlers/Items2/iOS/LoopObservableItemsSource2.cs

@@ -22,6 +22,16 @@ public LoopObservableItemsSource2(IEnumerable itemSource, UICollectionViewContro
 
 		protected override NSIndexPath[] CreateIndexesFrom(int startIndex, int count)
 		{
+			if (!Loop)
+			{
+				return base.CreateIndexesFrom(startIndex, count);
+			}
+			var collectionView = CollectionView;
+			if (collectionView is null || count < 0)
+			{
+				return Array.Empty<NSIndexPath>();
+			}
+
 			if (ItemCount == 0)
 			{
 				count += 2;

src/Controls/tests/TestCases.HostApp/Issues/Issue31535.cs

@@ -0,0 +1,74 @@
+using System.Collections.ObjectModel;
+
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 31535, "[iOS] Crash occurred on CarouselView2 when deleting last one remaining item with loop as false", PlatformAffected.iOS)]
+public class Issue31535 : ContentPage
+{
+    ObservableCollection<string> _items = new();
+    public ObservableCollection<string> Items
+    {
+        get => _items;
+        set
+        {
+            _items = value;
+            OnPropertyChanged();
+        }
+    }
+    public Issue31535()
+    {
+        // Initialize items
+        Items = new ObservableCollection<string>
+        {
+            "Item 1",
+            "Item 2",
+        };
+
+        // Create CarouselView
+        var carousel = new CarouselView2
+        {
+            Loop = false,
+            HeightRequest = 200,
+            ItemsSource = Items,
+            AutomationId = "TestCarouselView",
+            ItemTemplate = new DataTemplate(() =>
+            {
+                var border = new Border
+                {
+                    Margin = 10,
+                    WidthRequest = 200,
+                    BackgroundColor = Colors.Red
+                };
+
+                var label = new Label();
+                label.SetBinding(Label.TextProperty, ".");
+
+                border.Content = label;
+                return border;
+            })
+        };
+
+        // Create Button
+        var button = new Button
+        {
+            AutomationId = "RemoveLastItemButton",
+            Text = "Remove last item"
+        };
+
+        button.Clicked += (s, e) =>
+        {
+            if (Items.Count > 0)
+                Items.RemoveAt(Items.Count - 1);
+        };
+
+        Content = new VerticalStackLayout
+        {
+            Children =
+            {
+                carousel,
+                button
+            }
+        };
+        BindingContext = this;
+    }
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue31535.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue31535 : _IssuesUITest
+{
+    public Issue31535(TestDevice device) : base(device) { }
+
+    public override string Issue => "[iOS] Crash occurred on CarouselView2 when deleting last one remaining item with loop as false";
+
+    [Test]
+    [Category(UITestCategories.CarouselView)]
+    public void CarouselView2ShouldNotCrashOnRemoveLastItem()
+    {
+        App.WaitForElement("RemoveLastItemButton");
+        App.Tap("RemoveLastItemButton");
+        //remove last one remaining item
+        App.Tap("RemoveLastItemButton");
+        App.WaitForElement("TestCarouselView");
+    }
+}