手勢識別-UITapGestureRecognizer

//單指單擊
2: UITapGestureRecognizer *singleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self
3: action:@selector(handleSingleFingerEvent:)];
4: singleFingerOne.numberOfTouchesRequired = 1; //手指數
5: singleFingerOne.numberOfTapsRequired = 1; //tap次數
6: singleFingerOne.delegate = self;
7:
8: //單指雙擊
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: //雙指單擊
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: //如果不加下面的話，當單指雙擊時，會先調用單指單擊中的處理，再調用單指雙擊中的處理
29: [singleFingerOne requireGestureRecognizerToFail:singleFingerTwo];
30: //同理雙指亦是如此
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];
處理事件的方法，代碼：
1: //處理單指事件
2: - (void)handleSingleFingerEvent:(UITapGestureRecognizer *)sender
3: {
4: if (sender.numberOfTapsRequired == 1) {
5: //單指單擊
6: NSLog(@"單指單擊");
7: }else if(sender.numberOfTapsRequired == 2){
8: //單指雙擊
9: NSLog(@"單指雙擊");
10: }
11: }
12: //處理雙指事件
13: - (void)handleDoubleFingerEvent:(UITapGestureRecognizer *)sender
14: {
15: if (sender.numberOfTapsRequired == 1) {
16: //雙指單擊
17: NSLog(@"雙指單擊");
18: }else if(sender.numberOfTapsRequired == 2){
19: //雙指雙擊
20: NSLog(@"雙指雙擊");
21: }
22: }
將相應代碼複製到你的工程中即可使用，由於代碼中已經有詳細的解釋說明，這裏就不在重複解釋了。
代碼中只是列舉了單指與雙指對於單擊或多擊的處理，同理多指的操作需修改numberOfTouchesRequired屬性，對點擊的次數需修改numberOfTapsRequired屬性。
對於其他手勢例如UISwipeGestureRecognizer，UILongPressGestureRecognizer,UILongPressGestureRecognizer的操作使用類似處理。