Issue with CustomScrollViewRenderer in MAUI Migration – ScrollView Content Not Displaying

Question

Hello,

I’m currently migrating a Xamarin.Forms application to .NET MAUI, and I’m encountering an issue with a CustomScrollRenderer that was previously working fine in Xamarin.Forms. In the Xamarin project, I used a custom renderer for ScrollViewRenderer, but when I add it to my MAUI project, it causes all content within scroll views to appear empty.

Here’s the relevant setup in MauiProgram.cs:

builder

.UseMauiApp<App>()

.ConfigureMauiHandlers(handlers =>

{

#if ANDROID

handlers.AddCompatibilityRenderer(typeof(CustomScrollView), typeof(SKM_MOBILE.Droid.Renderers.CustomScrollRenderer));

#endif

});

And my CustomScrollRenderer class:
namespace SKM_MOBILE.Droid.Renderers

{

public class CustomScrollRenderer : ScrollViewRenderer

{

public CustomScrollRenderer() : base(MainActivity.Instance.ApplicationContext)

{

}

}

}

Problem:

• When AddCompatibilityRenderer is enabled, all scroll view content is empty.
• **If I comment out AddCompatibilityRenderer, the scroll view contents render as expected.
  **
  I’m wondering if there are any known issues or additional steps required for compatibility renderers in MAUI, specifically for ScrollViewRenderer. I’d appreciate any guidance or suggestions on resolving this issue.

Answer 1

Hello,

The AddCompatibilityRenderer registration method is currently deprecated in Maui. If you need to continue using Renderer in Maui, you should use the AddHandler method to register.

Please refer to Register renderers for more details.

In addition, since Renderer has been deprecated in Maui and will not be updated any more. it is recommended that you refer to Migrate a Xamarin.Forms custom renderer to a .NET MAUI handler to migrate it to Handler.

Best Regards,

Alec Liu.

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