关于UITapGestureRecognizer (给控件添加点

//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");
 }else if(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");
 }else if(sender.numberOfTapsRequired == 2){
//双指双击
NSLog(@"双指双击");
 }
}