[iOS] FrameworkElement in Resources is not loaded

[MartinZikmund]

Current behavior

When an element is in the Resources of another element, it's Loaded event is never called.

Expected behavior

Should be called.

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

<Grid x:Name="RootGrid" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
  <Grid.Resources>
    <TextBlock x:Key="TestTextBlock" Text="Hello, world!" Margin="20" FontSize="30" />
  </Grid.Resources>
  <TextBlock x:Name="ResultTextBlock" Text="Not loaded" />
</Grid>

public MainPage()
{
    this.InitializeComponent();
    var textBlock = (TextBlock)RootGrid.Resources["TestTextBlock"];
    textBlock.Loaded += (s, e) =>
    {
        ResultTextBlock.Text = "Loaded!";
    };
}

Workaround

Environment

Nuget Package:

• Uno.UI / Uno.UI.WebAssembly / Uno.UI.Skia
• Uno.WinUI / Uno.WinUI.WebAssembly / Uno.WinUI.Skia
• Uno.SourceGenerationTasks
• Uno.UI.RemoteControl / Uno.WinUI.RemoteControl
• Other:

Nuget Package Version(s):

Affected platform(s):

• iOS
• Android
• WebAssembly
• WebAssembly renderers for Xamarin.Forms
• macOS
• Skia
  • WPF
  • GTK (Linux)
  • Tizen
• Windows
• Build tasks
• Solution Templates

IDE:

• Visual Studio 2017 (version: )
• Visual Studio 2019 (version: )
• Visual Studio for Mac (version: )
• Rider Windows (version: )
• Rider macOS (version: )
• Visual Studio Code (version: )

Relevant plugins:

• Resharper (version: )

Anything else we need to know?

[MartinZikmund]

I'm sorry, @davidjohnoliver 😅

[davidjohnoliver]

Really, Loaded gets called on views that are in Resources?? Also, why are you putting views in Resources??? You're killing me @MartinZikmund 😅

[MartinZikmund]

Really, Loaded gets called on views that are in Resources?? Also, why are you putting views in Resources??? You're killing me @MartinZikmund 😅

Not intentionally though 😂... Many samples (and runtime tests) of TeachingTip have the control in Resources. Then the tests wait for Loaded to be invoked and I was trying to figure out why the app just froze... So that's why 😀😀

[Youssef1313]

I think this is where it happens in WinUI.

[MartinZikmund]

Will handle the iOS part