方法1: 修改UIImageView的layer
imageView.layer.cornerRadius = self.size.width/2;
imageView.clipsToBounds = YES;
方法2: 裁剪image
#import "UIImage+SRExtension.h"
@implementation UIImage (SRExtension)
-(UIImage *)circleImage{
// NO:代表透明
UIGraphicsBeginImageContextWithOptions(self.size, NO, 0.0);
//獲取圖片上下文
CGContextRef ref = UIGraphicsGetCurrentContext();
//添加一個園
CGRect rect = CGRectMake(0, 0, self.size.width,self.size.height);
CGContextAddEllipseInRect(ref, rect);
//裁剪
CGContextClip(ref);
//畫上去
[self drawInRect:rect];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
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