EmptyMauiApp/MauiApp/Helpers/EntryHelper.cs

namespace MauiApp.Helpers;

public static class EntryHelper
{
    public static void RemoveBorders()
    {
        Microsoft.Maui.Handlers.EntryHandler.Mapper.AppendToMapping("Borderless", (handler, view) =>
        {
#if ANDROID
            handler.PlatformView.Background = null;
            handler.PlatformView.SetBackgroundColor(Android.Graphics.Color.Transparent);
#elif IOS
            handler.PlatformView.BackgroundColor = UIKit.UIColor.Clear;
            handler.PlatformView.Layer.BorderWidth = 0;
            handler.PlatformView.BorderStyle = UIKit.UITextBorderStyle.None;
#endif
        });

        Microsoft.Maui.Handlers.PickerHandler.Mapper.AppendToMapping("Borderless", (handler, view) =>
        {
#if ANDROID
            handler.PlatformView.Background = null;
            handler.PlatformView.SetBackgroundColor(Android.Graphics.Color.Transparent);
#elif IOS
            handler.PlatformView.BackgroundColor = UIKit.UIColor.Clear;
            handler.PlatformView.Layer.BorderWidth = 0;
            handler.PlatformView.BorderStyle = UIKit.UITextBorderStyle.None;
#endif
        });
    }
}