点击手势

手势
//图像添加点击事件（手势方法）
self.headImageView.userInteractionEnabled = YES;
UITapGestureRecognizer * PrivateLetterTap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAvatarView:)];
PrivateLetterTap.numberOfTouchesRequired = 1; //手指数
PrivateLetterTap.numberOfTapsRequired = 1; //tap次数
PrivateLetterTap.delegate= self;
self.headImageView.contentMode = UIViewContentModeScaleToFill;
[self.headImageView addGestureRecognizer:PrivateLetterTap];

- (void)tapAvatarView: (UITapGestureRecognizer *)gesture
{
}