MvvmCross Support

[jeromelaban]

What would you like to be added:

MVVM Cross support.

For which Platform:

• iOS
• Android
• WebAssembly
• Windows

Anything else we need to know?

Ongoing work is available here: https://github.com/nickrandolph/MvvmCross/tree/feature/uno3support
PR to mvvmcross: MvvmCross/MvvmCross#3898

[davidjohnoliver]

For now, using MvvmCross with Uno on WebAssembly requires setting the following somewhere in app code (eg from App.xaml.cs constructor):

#if __WASM__
            Windows.UI.Core.CoreDispatcher.HasThreadAccessOverride = true;
#endif

Otherwise MvvmCross' ExecuteOnMainThreadAsync() method will deadlock (because Uno's CoreDispatcher.HasThreadAccess will always return false).

This is a temporary requirement, until WASM threading is supported on all browsers and by Mono (mono/mono#12453).

[nickrandolph]

@davidjohnoliver I've just updated the Uno bits in mvvmcross to Uno v3. I assume that the threading workaround is still required? Or should MvvmCross work without the HasThreadAccessOverride being set to true?

[davidjohnoliver]

Yes the workaround is still required. There's been some progress on threading support on Mono, but it's still at an experimental state and it's not yet enabled in Uno.UI.Wasm.