0.最简单实用，不影响帧数的设置全圆角的方法，是自定义一个类继承于UIimageview，在它上面在加一个image，图片为中间一个透明的圆，四周为所需要底色的颜色，最好还设置下highlightedImage
self.image_icon.frame = CGRectMake(-1, -1, h + 2, h + 2);//尺寸
/**
* 设置全部圆角(注意:需要首先设置控件的bounds或者frame，否则会加载不出来，因为它需要根据child的尺寸来设置)
*
* @param child 设置圆角的控件
*/
+(void)setUpAllCornerWithChildView:(UIView *)child
{
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:child.bounds byRoundingCorners:UIRectCornerAllCorners cornerRadii:child.bounds.size];
CAShapeLayer *maskLayer = [[CAShapeLayer alloc]init];
//设置大小
maskLayer.frame = child.bounds;
//设置图形样子
maskLayer.path = maskPath.CGPath;
child.layer.mask = maskLayer;
child.layer.shouldRasterize = YES; //圆角缓存
child.layer.rasterizationScale = [UIScreen mainScreen].scale;//提高流畅度
}
2.设置局部圆角
/**
* 设置圆角
*
* @param rect 控件的尺寸
* @param corner 圆角的尺寸
* @param radio 圆角位置
* @param child 控件
*/
+(void)setUpCornerWithRect:(CGRect )rect withUIRectCorner:(UIRectCorner )corner withSize:(CGSize )radio withView:(UIView *)child
{
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:rect byRoundingCorners:corner cornerRadii:radio];
CAShapeLayer *masklayer = [[CAShapeLayer alloc]init];//创建shapelayer
masklayer.frame = child.bounds;
masklayer.path = path.CGPath;//设置路径
child.layer.mask = masklayer;
child.layer.shouldRasterize = YES; //圆角缓存
child.layer.rasterizationScale = [UIScreen mainScreen].scale;//提高流畅度
}
3.设置图片圆角
/** 设置圆形图片(放到分类中使用) */
- (UIImage *)cornerWithImage {
UIGraphicsBeginImageContextWithOptions(self.size, NO, 0.0);
// 获取上下文
CGContextRef ctr = UIGraphicsGetCurrentContext();
// 设置圆形
CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
CGContextAddEllipseInRect(ctr, rect);
// 裁剪
CGContextClip(ctr);
// 将图片画上去
[self drawInRect:rect];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
