问题
I have a image in rectangle shape but i want to crop this image in a star shape in my iphone application. so please can any one suggest how i do this? plz suggest. thanks
回答1:
See the comment to a related question on how to mask an image. The magical part is CGContextClipToMask.
来源：https://stackoverflow.com/questions/5701152/crop-image-in-star-shape-iphone