给UIImageView加上圆角效果

效果图：

代码：

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(50, 100, 200, 200)];
    imageView.backgroundColor=[UIColor greenColor];
    imageView.layer.cornerRadius = 10;
    imageView.clipsToBounds = YES;
    [self.view addSubview:imageView];

}