public override void ViewDidLoad()
        {
            base.ViewDidLoad ();

            RectangleF f = new RectangleF (0, 0, 100, 100);

            indicator = new MetroActivityIndicatorView (f);
            View.AddSubview (indicator);
        }
        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            RectangleF f = new RectangleF(0, 0, 100, 100);

            indicator = new MetroActivityIndicatorView(f);
            View.AddSubview(indicator);
        }