[iOs] Async update of ListView with ObservableCollection not working

[TopperDEL]

Current behavior

A ObservableCollection gets updated from an async function, but the changes are not populated to the Listview it is Bound to. This works on UWP, Droid and WASM.

Expected behavior

The items are populated once they are Added to the ObservableCollection.

How to reproduce it (as minimally and precisely as possible)

See this GitHub-Repo: https://github.com/TopperDEL/UnoTest01
The update happens in OnNavigatedTo from the MainPage. Remove the async Task.Delay to see it update correctly.

My assumption is that ObservableCollection does not raise ItemAdded/Changed-Events on iOs.

Environment

Nuget Package: v2.0.5

Package Version(s):

Affected platform(s):

• iOS
• Android
• WebAssembly
• WebAssembly renderers for Xamarin.Forms
• Windows
• Build tasks
• Solution Templates

Visual Studio:

• 2017 (version: )
• 2019 (version: )
• for Mac (version: )

Relevant plugins:

• Resharper (version: )

Anything else we need to know?

[jeromelaban]

Thanks for the report. The ListView is incorrectly measured because it's in a StackPanel. Try placing it in a Grid instead.

[TopperDEL]

I can confirm that it's working with a Grid instead of a StackPanel around the ListView.