UIImageView添加圆角的几种方法

1 离屏渲染但是比较消耗性能

imgView.layer.cornerRadius = 10;

imgView.clipsToBounds = YES; 

2 自定义一个接口来实现

- (UIImage *)hyb_imageWithCornerRadius:(CGFloat)radius {

  CGRect rect = (CGRect){0.f, 0.f, self.size};

  UIGraphicsBeginImageContextWithOptions(self.size, NO, UIScreen.mainScreen.scale);

   CGContextAddPath(UIGraphicsGetCurrentContext(), [UIBezierPath bezierPathWithRoundedRect:rect 

   cornerRadius:radius].CGPath);

   CGContextClip(UIGraphicsGetCurrentContext());

   [self drawInRect:rect];

   UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return image;

}