show u the code

其實你只需要的時圓角圖片。。。。。

 UIGraphicsBeginImageContextWithOptions(image.size, NO, image.scale);
 [[UIBezierPath bezierPathWithRoundedRect:RECT     cornerRadius:RADIUS] addClip];
 [image drawInRect:RECT];
 UIImage* imageNew =     UIGraphicsGetImageFromCurrentImageContext();
 UIGraphicsEndImageContext();