ios中使用imageview实现放大、缩小和点击的效果

Question

我的ImageView需要像相册默认的效果一样，可以双指放大、缩小。同时又要支持双击进入另一个ViewController，如何实现呢？

Answer 1

通过UITapGestureRecognizer，注册双击和缩放使用不同selector很容易区分，代码如下：

     UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
     UITapGestureRecognizer *twoFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTwoFingerTap:)];
                
           [doubleTap setNumberOfTapsRequired:2];
           [twoFingerTap setNumberOfTouchesRequired:2];
           [imageView addGestureRecognizer:doubleTap];
           [imageView addGestureRecognizer:twoFingerTap];
                
           [doubleTap release];
           [twoFingerTap release];