给图片设置圆角和圆形边框,添加点击事件

//1.创建图片
_userImage = [[UIImageView alloc]init];
　　
　　//2.设置图片圆角
_userImage.layer.cornerRadius  = 33;
_userImage.layer.masksToBounds = YES;

//3.设置圆形边框
CALayer *layer    = [_userImage layer];
layer.borderColor = [[UIColor whiteColor] CGColor];
layer.borderWidth = 2.0f;

//4.给图片添加点击事件
_userImage.userInteractionEnabled    = YES;
UITapGestureRecognizer *userImageTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(userImageAction)];
[_userImage addGestureRecognizer: userImageTap];