简单粗暴点 直接上代码吧
-(void)createUI{
UIView * view1 = [[UIView alloc]initWithFrame:CGRectMake(50, 120, 100, 100)];
view1.backgroundColor = [UIColor grayColor];
[self.view addSubview:view1];
CGFloat radius = 15; // 圆角大小
UIRectCorner corner = UIRectCornerTopLeft | UIRectCornerBottomLeft; // 圆角位置
UIBezierPath * path = [UIBezierPath bezierPathWithRoundedRect:view1.bounds byRoundingCorners:corner cornerRadii:CGSizeMake(radius, radius)];
CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = view1.bounds;
maskLayer.path = path.CGPath;
view1.layer.mask = maskLayer;
}
