HasUnevenRows=True and Image in ItemTemplate causes InvalidOperationException

[ThuCommix]

Description

If I enable HasUnevenRows, and my ItemTemplate contains an Image the app crashes with a invalid operation exception.

Minimal repro:
MauiApp1.zip

If you disable HasUnevenRows the ListView works again.

Steps to Reproduce

1. Debug the attached project.

Version with bug

6.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 15

Did you find any workaround?

• Disabling HasUnevenRows

Relevant log output

System.InvalidOperationException: PlatformView cannot be null here
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IImage, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[UIKit.UIImageView, Microsoft.iOS, Version=15.4.300.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].get_PlatformView()
   at Microsoft.Maui.Handlers.ImageHandler.DisconnectHandler(UIImageView platformView)
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IImage, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[UIKit.UIImageView, Microsoft.iOS, Version=15.4.300.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].OnDisconnectHandler(UIView platformView)
   at Microsoft.Maui.Handlers.ViewHandler.OnDisconnectHandler(Object platformView)
   at Microsoft.Maui.Handlers.ElementHandler.DisconnectHandler(Object platformView)
   at Microsoft.Maui.Handlers.ElementHandler.Microsoft.Maui.IElementHandler.DisconnectHandler()
   at Microsoft.Maui.Controls.Handlers.Compatibility.ListViewRenderer.UnevenListViewDataSource.CalculateHeightForCell(UITableView tableView, Cell cell)
   at Microsoft.Maui.Controls.Handlers.Compatibility.ListViewRenderer.UnevenListViewDataSource.GetEstimatedRowHeight(UITableView table)
   at Microsoft.Maui.Controls.Handlers.Compatibility.ListViewRenderer.UnevenListViewDataSource.UpdateEstimatedRowHeight(UITableView tableView)
   at Microsoft.Maui.Controls.Handlers.Compatibility.ListViewRenderer.ListViewDataSource.DetermineEstimatedRowHeight()
   at Microsoft.Maui.Controls.Handlers.Compatibility.FormsUITableViewController.ViewWillLayoutSubviews()
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass)
   at MauiApp1.Program.Main(String[] args) in /Users/kevin/Projects/MauiApp1/MauiApp1/Platforms/iOS/Program.cs:line 12

[MattSullivanRio]

I can confirm I am having the same issues. It's worth noting however that it's not isolated to images. I've had a listview containing nothing but labels encounter this issue. I believe it occurs for all uneven rows, but I may be wrong there. Disabling HasUnevenRows fixes the issue.

[kristinx0211]

confirm this on IOS as describe above.

[gavinb80]

Can confirm I have the same issue with builds for Mac, iPhone and Android.

The following works as expected:

            <ListView
                ItemsSource="{Binding IncidentCategories}"
                VerticalOptions="FillAndExpand">

The following causes a crash:

            <ListView
                ItemsSource="{Binding IncidentCategories}"
                HasUnevenRows="True"
                VerticalOptions="FillAndExpand">

Crash log:

System.InvalidOperationException: PlatformView cannot be null here
  at at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IImage, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[UIKit.UIImageView, Microsoft.MacCatalyst, Version=15.4.300.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].get_PlatformView()
  at at Microsoft.Maui.Handlers.ImageHandler.DisconnectHandler(UIImageView platformView)
  at at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IImage, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[UIKit.UIImageView, Microsoft.MacCatalyst, Version=15.4.300.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].OnDisconnectHandler(UIView platformView)
  at at Microsoft.Maui.Handlers.ViewHandler.OnDisconnectHandler(Object platformView)
  at at Microsoft.Maui.Handlers.ElementHandler.DisconnectHandler(Object platformView)
  at at Microsoft.Maui.Handlers.ElementHandler.Microsoft.Maui.IElementHandler.DisconnectHandler()
  at at Microsoft.Maui.Controls.Handlers.Compatibility.ListViewRenderer.UnevenListViewDataSource.CalculateHeightForCell(UITableView tableView, Cell cell)
  at at Microsoft.Maui.Controls.Handlers.Compatibility.ListViewRenderer.UnevenListViewDataSource.GetEstimatedRowHeight(UITableView table)
  at at Microsoft.Maui.Controls.Handlers.Compatibility.ListViewRenderer.UnevenListViewDataSource.UpdateEstimatedRowHeight(UITableView tableView)
  at at Microsoft.Maui.Controls.Handlers.Compatibility.ListViewRenderer.ListViewDataSource.DetermineEstimatedRowHeight()
  at at Microsoft.Maui.Controls.Handlers.Compatibility.FormsUITableViewController.ViewWillLayoutSubviews()
  at at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass)
  at DsfrsApp.Program.Main(String[] args) in /Users/xxx/Projects/DsfrsApp/DsfrsApp/Platforms/MacCatalyst/Program.cs:13

If I remove the image from the stack, it works just fine as well

[techresidential]

Just in case anyone else is stumbling across this error with ListView+HasUnevenRows+iOS: using the CollectionView is a better way to go.

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[jsuarezruiz]

Cannot reproduce the issue using the current main branch or 6.0.525 workloads.

Could you try again with latest version?

[ghost]

Hi @ThuCommix. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[ThuCommix]

Hi @jsuarezruiz, I've checked again on it and it works on the latest workload. Thanks.