Reusing the xamarin forms renderer in .net maui

Question

I am working on migrating xamarin forms application to .net maui.

as part of migration i am working on reusing the xamarin forms renderers in .net maui with "Microsoft.Maui.Controls.Compatibility" package.

when i am registering the renderer in MauiProgram.cs using ConfigureMauiHandlers getting error

below is my code in MauiProgram.cs to ConfigureMauiHandlers. Getting error for

typeof(CardReaderViewRenderer) as this is the iOS implementation of Renderer.

Error : The type or namespace name 'CardReaderViewRenderer' could not be found (are you missing a using directive or an assembly reference?)

 var builder = MauiApp.CreateBuilder();
            builder
                .UseMauiApp<App>()
                .UseMauiCompatibility()
                .ConfigureMauiHandlers(handlers =>
                {
                    handlers.AddCompatibilityRenderer(typeof(CardReaderView), typeof(CardReaderViewRenderer));

#if __IOS__

                    
#elif __ANDROID__
#endif
                });

Answer 1

As the error show, that may due to the loss of the assembly reference so the CardReaderViewRenderer cannot be found.

You could try code like this:

.ConfigureMauiHandlers((handlers) =>
        {
#if ANDROID
            handlers.AddHandler(typeof(CardReaderView),typeof(XamarinCustomRenderer.Droid.Renderers.CardReaderViewRenderer));
#elif IOS
            handlers.AddHandler(typeof(CardReaderView), typeof(XamarinCustomRenderer.iOS.Renderers.CardReaderViewRenderer));
#endif
        });

For more info, you could refer to Use custom renderers in .NET MAUI and sample code