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[BUG] MediaElement not supported in a DataTemplate on MacCatalyst in an application using multiple windows

Open TheCodeTraveler opened this issue 1 year ago • 0 comments

Is there an existing issue for this?

  • [X] I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

  • [X] I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

On MacCatalyst, when using a MediaElement in a DataTemplate on a page that contains multiple ItemsViews, the following exception is thrown:

System.NotSupportedException: MediaElement is not currently supported in multi-window applications
   at CommunityToolkit.Maui.Core.Views.MauiMediaElement.TryGetCurrentPage(Page) in /Users/minnbran/GitHub/CommunityToolkit.Maui/src/CommunityToolkit.Maui.MediaElement/Views/MauiMediaElement.macios.cs:line 132
   at CommunityToolkit.Maui.Core.Views.MauiMediaElement..ctor(AVPlayerViewController playerViewController, MediaElement virtualView) in /Users/minnbran/GitHub/CommunityToolkit.Maui/src/CommunityToolkit.Maui.MediaElement/Views/MauiMediaElement.macios.cs:line 52
   at CommunityToolkit.Maui.Core.Handlers.MediaElementHandler.CreatePlatformView() in /Users/minnbran/GitHub/CommunityToolkit.Maui/src/CommunityToolkit.Maui.MediaElement/Handlers/MediaElementHandler.macios.cs:line 27
   at Microsoft.Maui.Handlers.ViewHandler`2[[CommunityToolkit.Maui.Views.MediaElement, CommunityToolkit.Maui.MediaElement, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[CommunityToolkit.Maui.Core.Views.MauiMediaElement, CommunityToolkit.Maui.MediaElement, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].OnCreatePlatformView()
   at Microsoft.Maui.Handlers.ViewHandler.OnCreatePlatformElement()
   at Microsoft.Maui.Handlers.ElementHandler.CreatePlatformElement()
   at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view)
   at Microsoft.Maui.Handlers.ViewHandler`2[[CommunityToolkit.Maui.Views.MediaElement, CommunityToolkit.Maui.MediaElement, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[CommunityToolkit.Maui.Core.Views.MauiMediaElement, CommunityToolkit.Maui.MediaElement, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IView view)
   at Microsoft.Maui.Handlers.ViewHandler`2[[CommunityToolkit.Maui.Views.MediaElement, CommunityToolkit.Maui.MediaElement, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[CommunityToolkit.Maui.Core.Views.MauiMediaElement, CommunityToolkit.Maui.MediaElement, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view)
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler)
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value)
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context)
   at Microsoft.Maui.Platform.ElementExtensions.ToPlatform(IElement view, IMauiContext context)
   at Microsoft.Maui.Handlers.LayoutHandler.SetVirtualView(IView view)
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.ILayout, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.LayoutView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view)
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler)
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value)
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context)
   at Microsoft.Maui.Platform.ElementExtensions.ToPlatform(IElement view, IMauiContext context)
   at Microsoft.Maui.Handlers.BorderHandler.UpdateContent(IBorderHandler handler)
   at Microsoft.Maui.Handlers.BorderHandler.MapContent(IBorderHandler handler, IBorderView border)
   at Microsoft.Maui.PropertyMapper`2.<>c__DisplayClass5_0[[Microsoft.Maui.IBorderView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Handlers.IBorderHandler, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].<Add>b__0(IElementHandler h, IElement v)
   at Microsoft.Maui.PropertyMapper.UpdatePropertyCore(String key, IElementHandler viewHandler, IElement virtualView)
   at Microsoft.Maui.PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView)
   at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view)
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IBorderView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IView view)
   at Microsoft.Maui.Handlers.BorderHandler.SetVirtualView(IView view)
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IBorderView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view)
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler)
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value)
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value)
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context)
   at Microsoft.Maui.Platform.ViewExtensions.ToHandler(IView view, IMauiContext context)
   at Microsoft.Maui.Controls.Handlers.Items.TemplateHelpers.GetHandler(View view, IMauiContext context)
   at Microsoft.Maui.Controls.Handlers.Items.TemplatedCell.Bind(DataTemplate template, Object bindingContext, ItemsView itemsView)
   at Microsoft.Maui.Controls.Handlers.Items.ItemsViewController`1[[Microsoft.Maui.Controls.CarouselView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].UpdateTemplatedCell(TemplatedCell cell, NSIndexPath indexPath)
   at Microsoft.Maui.Controls.Handlers.Items.CarouselViewController.GetCell(UICollectionView collectionView, NSIndexPath indexPath)
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 61
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 96
   at CommunityToolkit.Maui.Sample.Program.Main(String[] args) in /Users/minnbran/GitHub/CommunityToolkit.Maui/samples/CommunityToolkit.Maui.Sample/Platforms/iOS/Program.cs:line 7

This is a known bug where a NotSupportedException is thrown:

https://github.com/CommunityToolkit/Maui/blob/ed06645844df6aa05216eaab44b984f65020be09/src/CommunityToolkit.Maui.MediaElement/Views/MauiMediaElement.macios.cs#L132

Expected Behavior

The MediaElement should work on MacCatalyst when using multiple windows.

Steps To Reproduce

  1. On an iOS device, launch CommunityToolkit.Maui.Sample
  2. In CommunityToolkit.Maui.Sample, navigate to Views -> MediaElementMultipleWindowPage
  3. Confirm app crashes

Link to public reproduction project repository

https://github.com/CommunityToolkit/Maui/tree/main/samples

Environment

- .NET MAUI CommunityToolkit MediaElement: v4.1.2
- OS: iOS
- .NET MAUI:
 [maui]
   Installation Source: SDK 8.0.400
   Manifest Version:    8.0.82/8.0.100
   Manifest Path:       /usr/local/share/dotnet/sdk-manifests/8.0.100/microsoft.net.sdk.maui/8.0.82/WorkloadManifest.json
   Install Type:        FileBased

Anything else?

This bug does not currently affect .NET 8, but may affect .NET 9 that deprecates Application.MainPage in favor of Application.CreateWindow(IApplicationState): https://learn.microsoft.com/en-us/dotnet/maui/whats-new/dotnet-9?view=net-maui-8.0#mainpage

TheCodeTraveler avatar Oct 03 '24 21:10 TheCodeTraveler