How to make an overlay with round edges (iPhone SDK)?

问题

I've just received a lot of good responses to the question about making overlay views. Is there a way that I can make an overlay view on the iPhone SDK?

Another question I have is how to make an overlay view have round edges like in the Skype iPhone app or in the Phone.app.

Thanks.

回答1:

You can use these helper functions and then mask/clip to the resulting CGPath:

http://fabian-kreiser.com/index.php?id=1135350598525812781

Or use view.layer.cornerRadius, as seen in How do I create a round cornered UILabel on the iPhone?.

回答2:

Use the view.layer's cornerRadius property.

#include <QuartzCore/QuartzCore.h>

...

overlayView.layer.cornerRadius = 5.0;

来源：https://stackoverflow.com/questions/2253687/how-to-make-an-overlay-with-round-edges-iphone-sdk