UITapGestureRecognizer 的用法

转自http://blog.sina.com.cn/s/blog_7c336a8301011b3e.html

//单指单击

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

3: action:@selector(handleSingleFingerEvent:)];

4: singleFingerOne.numberOfTouchesRequired = 1; //手指数

5: singleFingerOne.numberOfTapsRequired = 1; //tap次数

6: singleFingerOne.delegate = self;

7:

8: //单指双击

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

10: action:@selector(handleSingleFingerEvent:)];

11: singleFingerTwo.numberOfTouchesRequired = 1;

12: singleFingerTwo.numberOfTapsRequired = 2;

13: singleFingerTwo.delegate = self;

14:

15: //双指单击

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

17: action:@selector(handleDoubleFingerEvent:)];

18: doubleFingerOne.numberOfTouchesRequired = 2;

19: doubleFingerOne.numberOfTapsRequired = 1;

20: doubleFingerOne.delegate = self;

21:

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

23:    action:@selector(handleDoubleFingerEvent:)];

24: doubleFingerTwo.numberOfTouchesRequired = 2;

25: doubleFingerTwo.numberOfTapsRequired = 2;

26: doubleFingerTwo.delegate = self;

27:

28: //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

29: [singleFingerOne requireGestureRecognizerToFail:singleFingerTwo];

30: //同理双指亦是如此

31: [doubleFingerOne requireGestureRecognizerToFail:doubleFingerTwo];

32:

33: [self.view addGestureRecognizer:singleFingerOne];

34: [self.view addGestureRecognizer:singleFingerTwo];

35: [self.view addGestureRecognizer:doubleFingerOne];

36: [self.view addGestureRecognizer:doubleFingerTwo];

37:

38: [singleFingerOne release];

39: [singleFingerTwo release];

40: [doubleFingerOne release];

41: [doubleFingerTwo release];

处理事件的方法，代码：

1: //处理单指事件

2: - (void)handleSingleFingerEvent:(UITapGestureRecognizer *)sender

3: {

4: if (sender.numberOfTapsRequired == 1) {

5: //单指单击

6: NSLog(@"单指单击");

7: }else if(sender.numberOfTapsRequired == 2){

8: //单指双击

9: NSLog(@"单指双击");

10: }

11: }

12: //处理双指事件

13: - (void)handleDoubleFingerEvent:(UITapGestureRecognizer *)sender

14: {

15: if (sender.numberOfTapsRequired == 1) {

16: //双指单击

17: NSLog(@"双指单击");

18: }else if(sender.numberOfTapsRequired == 2){

19: //双指双击

20: NSLog(@"双指双击");

21: }

22: }

将相应代码复制到你的工程中即可使用，由于代码中已经有详细的解释说明，这里就不在重复解释了。

代码中只是列举了单指与双指对于单击或多击的处理，同理多指的操作需修改numberOfTouchesRequired属性，对点击的次数需修改numberOfTapsRequired属性。

对于其他手势例如UISwipeGestureRecognizer，UILongPressGestureRecognizer,UILongPressGestureRecognizer的操作使用类似处理。