CAShapeLayer图片圆形效果

利用CAShapeLayer可以制作出任意的几何图形，把它作为UIImageView的遮罩，达到把图片做成圆形效果。 

 1 //创建个人主页头部的用户头像
 2 self.userHead = [[UIImageView alloc]initWithFrame:CGRectMake(10, 35, 80, 80)];
 3 self.userHead.image = [UIImage imageNamed:@"start.jpg"];
 4 
 5 //创建圆形遮罩，把用户头像变成圆形
 6 UIBezierPath* path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(40, 40) radius:40 startAngle:0 endAngle:2*M_PI clockwise:YES];
 7 CAShapeLayer* shape = [CAShapeLayer layer];
 8 shape.path = path.CGPath;
 9 self.userHead.layer.mask = shape;
10 
11 [self addSubview:self.userHead];
posted @ 2014-05-10 14:52  激情为梦想而生  阅读(327)  评论(0)  编辑  收藏  举报