iOS学习笔记18—UITapGestureRecognizer 的用法

/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。

补充：移动开发 , IOS ,