protected override void OnElementChanged(VisualElementChangedEventArgs e)
{
base.OnElementChanged(e);
if (e.OldElement != null || Element == null)
{
return;
}
try
{
//var el = (ContentPage)Element;
var img = UIImage.FromBundle("bg_shadow.png");
BGImage = new UIImageView(img);
BGImage.ContentMode = UIViewContentMode.ScaleAspectFill;
NativeView.InsertSubview(BGImage, 0);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(@" ERROR: ", ex.Message);
}
}
void RippleEffect(NSSet touches)
{
var touch = touches.AnyObject as UITouch;
var center = touch.LocationInView(NativeView);
var dimension = Element.Height > Element.Width
? (float)Element.Height
: (float)Element.Width;
ripple = ripple ?? new UIView(new CGRect(0, 0, dimension, dimension));
rippleContainer = rippleContainer ?? new UIView(new CGRect(0, 0, Element.Width, Element.Height));
ripple.Alpha = .5f;
ripple.Layer.CornerRadius = dimension * .5f;
ripple.BackgroundColor = FrameRipple.RippleColor.ToUIColor();
ripple.Center = center;
ripple.Transform = CGAffineTransform.MakeScale(0, 0);
rippleContainer.ClipsToBounds = true;
rippleContainer.InsertSubview(ripple, 0);
NativeView.InsertSubview(rippleContainer, 1);
var scale = 4.0f;
Animate(.6f,
() =>
{
ripple.Transform = CGAffineTransform.MakeScale(scale, scale);
ripple.Alpha = 0;
},
() =>
{
rippleContainer.RemoveFromSuperview();
ripple.RemoveFromSuperview();
});
}