How to change the color of Editor cursor on Maui iOS?

How can I change the color of the cursor in the Editor control on a Maui iOS app?

While renderers (from the other answer) still work, you shouldn't be using it anymore. That only exists for compatibility reasons with Xamarin.Forms.

What you want to do is create a modify the mapper. The official docs on how to do that can be found here.

If you want to do this for all Entry controls in your app, you can do this:

Microsoft.Maui.Handlers.EntryHandler.Mapper.AppendToMapping("CursorColor", (handler, view) =>
{
#if IOS
    handler.PlatformView.TintColor = UIKit.UIColor.Green;
#endif
});

Place this anywhere you like somewhere in the startup of your app. Maybe in your MauiProgram.cs.

If you want to do this for a specific instance of an Entry you want to create an inheritance and check for that in the above code. For instance, that would look like this:

class MyGreenEntry : Entry
{
}

Microsoft.Maui.Handlers.EntryHandler.Mapper.AppendToMapping("CursorColor", (handler, view) =>
{
#if IOS
    if (view is MyGreenEntry)
    {
        handler.PlatformView.TintColor = UIKit.UIColor.Green;
    }
#endif
});

I've created a little sample here: https://github.com/jfversluis/MauiCustomCursorColoriOSSample and written more about it in a blog post here: https://blog.verslu.is/maui/change-cursor-color-maui-ios/

Edit: oops, just noticed that this is about the Editor. All the same basically applies, but make sure to use the EditorHandler instead of the EntryHandler and of course inherit from the Editor if you want to use it only on one type. I updated the sample code in the repo just above here to also include the code for Editor.

You can use the Using Custom Renderers in .NET MAUI to achieve it.

Below are the detailed steps:

1. Create the MyEditor.cs in the Project folder:

public class MyEditor : Editor 
{

}

2. Create the platform-specific implementation file MyEditorRenderer.cs under Platform/iOS:

[Obsolete] 
public class MyEditorRenderer : EditorRenderer
{
     protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
     {
          base.OnElementChanged(e);

          if (Control != null)
          {
              Control.TintColor = UIColor.Green;
      }

   }
}

3. Register our handlers like below in the MauiProgram.cs:

       .ConfigureMauiHandlers(handlers =>
       {

#if IOS
             handlers.AddHandler(typeof(MyEditor), typeof(MyEditorRenderer));

#endif
       });

4. Finally, create an instance for the editor control and then run it to check.

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="MAUIProjectWithRenderer.MainPage"
xmlns:editor="clr-namespace:CustomRenderer"
>

<VerticalStacklayout>
    <editor:MyEditor /> 
</VerticalStacklayout>

</ContentPage>