[UWP] TouchEffect not working when app compiled with UseDotNetNativeToolchain=true

When publishing an app to the windows store, it’ll be recompiled with UseDotNetNativeToolchain set to true by Microsoft.

We can test this by building locally with <UseDotNetNativeToolchain>true</UseDotNetNativeToolchain> in the Release build configuration, and so far my experience is that code that uses toucheffect doesn’t work (ie I can click stuff and nothing happens - no errors, no ui changes).

I’ve set the TouchEffectPreserver.Preserve(); line in the UWP project’s app.xaml.cs file but no luck so far.

Has anyone else dealt with this issue?

[MitchBomcanhao]

as a final comment, this is the bare minimum I’ve kept

Xamarin.Forms.Forms.Init(e, new[] { typeof(TouchEffect.UWP.PlatformTouchEff).Assembly });

no system.reflection needed.

on a project where I’m using rgplugins.popup, which also needs to be added to this list of assemblies, I’ve joined them up like so:

Rg.Plugins.Popup.Popup.Init();

Xamarin.Forms.Forms.Init(
    e,
    Rg.Plugins.Popup.Popup.GetExtraAssemblies().Concat(
        new[] { typeof(TouchEffect.UWP.PlatformTouchEff).Assembly })
    );

[MitchBomcanhao]

I’ve found something that makes it work - just not sure it is a good workaround. Had to add using System.Reflection; and then the following initialization for Xamarin forms in app.xaml.cs:

// For .NET Native compilation, you have to tell Xamarin.Forms which assemblies it should scan for custom controls and renderers 
var otherAssemblies = new[] 
{
    typeof(PlatformTouchEff).GetTypeInfo().Assembly
};
Xamarin.Forms.Forms.Init(e, otherAssemblies);

this was following an example from https://www.mrgestures.com/#FAQs. This might be problematic as it might conflict with the fixes for other packages which do similar things, but at least there’s some progress.