MonoTouch: Rounded UIImage Convenience Method

Question

Is there a MonoTouch built-in method to round the edges of a UIImage ?

I seem to remember seeing it once.

Answer 1

Here is a nice code helper for MonoTouch users looking for a quick helper function. Tweeked code came from the Excellent Xamarin.com site:

public static UIImage RounderCorners (UIImage image, float width, float radius)
{
    UIGraphics.BeginImageContext (new SizeF (width, width));
    var c = UIGraphics.GetCurrentContext ();

                //Note: You need to write the Device.IsRetina code yourself 
    radius = Device.IsRetina ? radius * 2 : radius;

    c.BeginPath ();
    c.MoveTo (width, width / 2);
    c.AddArcToPoint (width, width, width / 2, width, radius);
    c.AddArcToPoint (0, width, 0, width / 2, radius);
    c.AddArcToPoint (0, 0, width / 2, 0, radius);
    c.AddArcToPoint (width, 0, width, width / 2, radius);
    c.ClosePath ();
    c.Clip ();

    image.Draw (new PointF (0, 0));
    var converted = UIGraphics.GetImageFromCurrentImageContext ();
    UIGraphics.EndImageContext ();
    return converted;
}