
正文
UIImageView添加圆角
提示:扫一扫查出行【扫一扫了解最新限行尾号】
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最直接的方法就是使用如下属性设置:
1 2 3 | imgView.layer.cornerRadius = 10;// 这一行代码是很消耗性能的imgView.clipsToBounds = YES; |
**这是离屏渲染(off-screen-rendering),消耗性能的**
给UIImage添加生成圆角图片的扩展API:这是on-screen-rendering
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | - (UIImage *)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;} |






