iOSHasFocus.cs

using System;
using System.Runtime.Remoting.Contexts;
using System.Threading;
using System.Threading.Tasks;
using System.Timers;
using SampleApp.CustomRenderers;
using SampleApp.iOS;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(CustomLabel),typeof(iOSHasFocus))]
namespace SampleApp.iOS
{
    public class iOSHasFocus : LabelRenderer
    {

        protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
        {
            base.OnElementChanged(e);

            if(Control != null)
            {
                Task.Delay(3000).ContinueWith((arg) =>
                {
                    Device.BeginInvokeOnMainThread(() => {
                        Console.WriteLine(Control.AccessibilityElementIsFocused().ToString());
                        if (Control.AccessibilityElementIsFocused())
                        {
                            Control.Text = "Focus";
                        }
                        else
                        {
                            Control.Text = "Not in focus";

                        }
                    });


                });
            }
            
                


                
                
            
            

            
        }

    }
}