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[iOS] CarouselView with CarouselViewHandler2 make app crash when Loop="False" and user scroll to the last position #26863

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vitalbit opened this issue Dec 30, 2024 · 1 comment · May be fixed by #26868
Open

[iOS] CarouselView with CarouselViewHandler2 make app crash when Loop="False" and user scroll to the last position #26863

vitalbit opened this issue Dec 30, 2024 · 1 comment · May be fixed by #26868
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collectionview-cv2 platform/iOS 🍎 s/verified Verified / Reproducible Issue ready for Engineering Triage t/bug Something isn't working

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@vitalbit
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Description

CarouselView with Loop="False" attribute and configuring new CarouselViewHandler2 makes application crash, when reaching last item position.

Steps to Reproduce

  1. Configure CarouselViewHandler2 in MauiProgram.cs for CarouselView
  2. Use CarouselView with Loop="False" attribute and ItemsSource with 2-3 objects.
  3. Scroll carousel view to the last position.

Actual result: application is crashed during navigation to the last item.
Expected result: we should be able to see last item.

Please see reproduction project repository with CarouselView on MainPage.xaml sample.

Link to public reproduction project repository

https://github.com/vitalbit/CarouselViewHandler2_LastIndex

Version with bug

9.0.21 SR2.1

Is this a regression from previous behavior?

No, this is something new

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

For now only Loop="True" can help to avoid this issue.

Relevant log output

Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
    at at System.Collections.Generic.List`1[[System.String, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].get_Item(Int32 index)
    at at System.Collections.ObjectModel.Collection`1[[System.String, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].System.Collections.IList.get_Item(Int32 index)
    at at Microsoft.Maui.Controls.Handlers.Items.ObservableItemsSource.ElementAt(Int32 index)
    at at Microsoft.Maui.Controls.Handlers.Items.ObservableItemsSource.get_Item(Int32 index)
    at at Microsoft.Maui.Controls.Handlers.Items.ObservableItemsSource.get_Item(NSIndexPath indexPath)
    at at Microsoft.Maui.Controls.Handlers.Items2.ItemsViewController2`1[[Microsoft.Maui.Controls.CarouselView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].DetermineCellReuseId(NSIndexPath indexPath)
    at at Microsoft.Maui.Controls.Handlers.Items2.CarouselViewController2.DetermineCellReuseId(NSIndexPath indexPath)
    at at Microsoft.Maui.Controls.Handlers.Items2.ItemsViewController2`1[[Microsoft.Maui.Controls.CarouselView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].GetCell(UICollectionView collectionView, NSIndexPath indexPath)
    at at Microsoft.Maui.Controls.Handlers.Items2.CarouselViewController2.GetCell(UICollectionView collectionView, NSIndexPath indexPath)
    at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/9/s/xamarin-macios/src/UIKit/UIApplication.cs:61
    at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/9/s/xamarin-macios/src/UIKit/UIApplication.cs:96
    at CarouselViewHandler2_LastIndex_Sample.Program.Main(String[] args) in /Users/vitalipantsialei/VSProjects/CarouselViewHandler2_LastIndex_Sample/CarouselViewHandler2_LastIndex_Sample/Platforms/iOS/Program.cs:13
@vitalbit vitalbit added the t/bug Something isn't working label Dec 30, 2024
@kubaflo kubaflo added the s/verified Verified / Reproducible Issue ready for Engineering Triage label Dec 30, 2024
@kubaflo
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kubaflo commented Dec 30, 2024

I can replicate it.

@kubaflo kubaflo linked a pull request Dec 30, 2024 that will close this issue
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@arosanti arosanti mentioned this issue Jan 3, 2025
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collectionview-cv2 platform/iOS 🍎 s/verified Verified / Reproducible Issue ready for Engineering Triage t/bug Something isn't working
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