给图片添加手势监听器(点击图片放大)

<pre name="code" class="objc">//添加手势
            UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] init];
            [recognizer addTarget:self action:@selector(tapPhoto:)];
            [photoView addGestureRecognizer:recognizer];<pre name="code" class="objc">//添加手势