Xamarin.Forms UWP exception using Pagerenderer

🐛 Bug Report

if i use pagerenderer just like below in uwp, lottie is throwing exception as

  at Lottie.Forms.UWP.Renderers.AnimationViewRenderer.<OnElementChanged>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
   at System.Threading.WinRTSynchronizationContextBase.Invoker.InvokeCore()

public class ContentPageRenderer : PageRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.Page> e)
        {
            base.OnElementChanged(e);

            if (e.OldElement != null || Element == null)
            {
                return;
            }

            ContentPage page = ((ContentPage)Element);
            if (page.Content == null )
                return;

            var XboxControls = new MyUserControl1();
            StackLayout stackLayout = new StackLayout() { Orientation = StackOrientation.Vertical };
            stackLayout.Children.Add(page.Content);
            stackLayout.Children.Add(XboxControls.ToView());

            page.Content = stackLayout;
        }

    }

Reproduction steps

1. run attached test project in UWP local, you will see that lottie will throw exception.
2. remove ContentPagerenderer class and run it again it works.

Version: 1.x 2.7 Platform:

• 📱 iOS
• 🤖 Android
• 🏁 WPF
• [x ] 🌎 UWP
• 🍎 MacOS
• 📺 tvOS
• [x ] 🐒 Xamarin.Forms

App3.zip

[azchohfi]

It has been superseded by a native Microsoft official version. We need to update LottieXamarin to use this new version. https://github.com/windows-toolkit/Lottie-Windows

[martijn00]

@sohchatt @azchohfi i’m happy to take PR’s for the update.