Xamarin.Forms WebView with ProgressBar for iOS and Android

WebViewWithProgressBar.Droid.cs

using Android.Content;
using WebViewWithProgressBar.Droid;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

// https://stackoverflow.com/a/8467430/1970317
[assembly: ExportRenderer(typeof(WebView), typeof(GenericWebViewRenderer))]
namespace WebViewWithProgressBar.Droid
{
    public class GenericWebViewRenderer : WebViewRenderer
    {
        Context ctx;

        public GenericWebViewRenderer(Context context) : base(context) 
        {
            ctx = context;
        }

        protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.WebView> e)
        {
            base.OnElementChanged(e);

            if (Control == null)
                return;

            var progressBar = new Android.Widget.ProgressBar(ctx, null, Android.Resource.Attribute.ProgressBarStyleHorizontal);
            Control.SetWebChromeClient(new MyWebChromeClient(progressBar));

            Control.AddView(progressBar);
        }

        class MyWebChromeClient : Android.Webkit.WebChromeClient
        {
            Android.Widget.ProgressBar progressBar;

            public MyWebChromeClient(Android.Widget.ProgressBar progressBar)
            {
                this.progressBar = progressBar;
            }

            public override void OnProgressChanged(Android.Webkit.WebView view, int newProgress)
            {
                progressBar.SetProgress(newProgress, true);
            }
        }
    }
}

WebViewWithProgressBar.iOS.cs

using Foundation;
using UIKit;
using WebViewWithProgressBar.iOS;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;

// https://stackoverflow.com/questions/21263358/uiwebview-with-progress-bar
[assembly: ExportRenderer(typeof(WebView), typeof(GenericWebViewRenderer))]
namespace WebViewWithProgressBar.iOS
{
    public class GenericWebViewRenderer : ViewRenderer<WebView, UIWebView> 
    {
        protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
        {
            base.OnElementChanged(e);

            if (Control == null)
            {
                var progressBar = new UIProgressView(UIProgressViewStyle.Bar);
                progressBar.TintColor = UIColor.Green;
                progressBar.TrackTintColor = UIColor.Black;
                progressBar.ProgressTintColor = UIColor.Red;

                var webView = new UIWebView(Frame);

                webView.AddSubview(progressBar);

                SetNativeControl(webView);

                Control.Delegate = new MyUIWebViewDelegate(progressBar);

                webView.LoadRequest(new NSUrlRequest(new NSUrl("https://google.com")));
            }
        }

        class MyUIWebViewDelegate : UIWebViewDelegate
        {
            UIProgressView progressBar { get; }

            public MyUIWebViewDelegate(UIProgressView progressBar)
            {
                this.progressBar = progressBar;
            }

            public override void LoadStarted(UIWebView webView)
            {
                progressBar.SetProgress(0.1f, false);
            }

            public override void LoadingFinished(UIWebView webView)
            {
                progressBar.SetProgress(1.0f, true);
            }

            public override void LoadFailed(UIWebView webView, NSError error)
            {
                // TODO:
            }
        }
    }
}