CODEWITHSUNDEEP
c#mauicustom-renderer
Victor Chelaru
Victor Chelaru

Reputation: 4847

Why does a ScrollViewRenderer make my ScrollView contents disappear in .NET MAUI

I'm not sure if this is a bug or if I'm doing something wrong. I have a Xamarin.Forms application which I am migrating to MAUI. I have a ScrollViewRenderer which I am adding to my project. For the sake of simplicity I have reduced the ScrollViewRenderer to be empty, as shown in the following code:

    public class StyledScrollViewRenderer : ScrollViewRenderer
    {
        public StyledScrollViewRenderer(Context context) : base(context)
        {

        }
    }

I enable this renderer with the following line:

builder
   .UseMauiApp<App>()
   ...
   .ConfigureMauiHandlers(handlers =>
   {
#if ANDROID
       handlers.AddCompatibilityRenderer(typeof(ScrollView), typeof(StyledScrollViewRenderer));
#endif
   })

If I run my application with the StyledScrollViewRenderer added, the contents of all scroll views are empty. If I comment out the AddCompatibilityRenderer, all contents in all ScrollViews render correctly.

Am I misunderstanding something about scrollViewRenderers? I was under the impression that these could be used to modify the existing appearance and behavior of particular views, but perhaps ScrollViewRenderer requires additional code for default rendering?

Upvotes: 1

Views: 529

Answers (1)

Victor Chelaru
Victor Chelaru

Reputation: 4847

Unfortunately I was unable to figure out how to solve this using the same renderer that I used in Xamarin.Forms, but it seems as if using a ScrollViewHandler (the new MAUI way of doing Renderers) seems to work well. I followed this answer to get past the issue I was having.

Migrate simple Custom Renderer from Xamarin.Forms to .NET MAUI

Upvotes: 1

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