给UIImageView增加点击事件

自己做了一个九宫格，里面的图标都是由多张图片重叠构成，然后包装成一个button来使用；

遇到的问题是如何给这个“button”增加点击事件？

解决思路1：网友提示在该“button”上增加一个真正的透明button，这样就可以顺利执行点击事件了；但是本人尝试发现，如果我调整了button的透明度后，点击是没有效果的！可能是我操作错误，待再次验证。

解决思路2：为UIImageView增加手势

[ImageView addGestureRecognizer:我们自己的手势recognizer];

如何创建一个手势？看看UITapGestureRecognizer 的用法吧

 //单指单击

 UITapGestureRecognizer *singleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self

 action:@selector(handleSingleFingerEvent:)];

 singleFingerOne.numberOfTouchesRequired = 1; //手指数

 singleFingerOne.numberOfTapsRequired = 1; //tap次数

 singleFingerOne.delegate= self;

 //单指双击

 UITapGestureRecognizer *singleFingerTwo = [[UITapGestureRecognizer alloc] initWithTarget:self

 action:@selector(handleSingleFingerEvent:)];

 singleFingerTwo.numberOfTouchesRequired = 1;

 singleFingerTwo.numberOfTapsRequired = 2;

 singleFingerTwo.delegate= self;

 //双指单击

 UITapGestureRecognizer *doubleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self

 action:@selector(handleDoubleFingerEvent:)];

 doubleFingerOne.numberOfTouchesRequired = 2;

 doubleFingerOne.numberOfTapsRequired = 1;

 doubleFingerOne.delegate= self;

 UITapGestureRecognizer *doubleFingerTwo = [[UITapGestureRecognizer alloc] initWithTarget:self

 action:@selector(handleDoubleFingerEvent:)];

 doubleFingerTwo.numberOfTouchesRequired = 2;

 doubleFingerTwo.numberOfTapsRequired = 2;

 doubleFingerTwo.delegate= self;

 //如果不加下面的话，当单指双击时，会先调用单指单击中的处理，再调用单指双击中的处理

 [singleFingerOne requireGestureRecognizerToFail:singleFingerTwo];

 //同理双指亦是如此

 [doubleFingerOne requireGestureRecognizerToFail:doubleFingerTwo];

 [self.view addGestureRecognizer:singleFingerOne];

 [self.view addGestureRecognizer:singleFingerTwo];

 [self.view addGestureRecognizer:doubleFingerOne];

 [self.view addGestureRecognizer:doubleFingerTwo];

 [singleFingerOne release];

 [singleFingerTwo release];

 [doubleFingerOne release];

 [doubleFingerTwo release];

处理事件的方法，代码：

 //处理单指事件

- (void)handleSingleFingerEvent:(UITapGestureRecognizer *)sender

{

if(sender.numberOfTapsRequired == 1) {

//单指单击

NSLog(@"单指单击");

 }elseif(sender.numberOfTapsRequired == 2){

//单指双击

NSLog(@"单指双击");

}

 }

 //处理双指事件

 - (void)handleDoubleFingerEvent:(UITapGestureRecognizer *)sender

 {

 if(sender.numberOfTapsRequired == 1) {

 //双指单击

 NSLog(@"双指单击");

 }elseif(sender.numberOfTapsRequired == 2){

 //双指双击

 NSLog(@"双指双击");

 }

 }