IOS疯狂基础之GestureRecognizer手势

在Iphone开发中，像UIimageView是不支持点击的，但往往我们却有很多能在Image上点击的需求，比如一个自定义的TableViewCell中放入三个UIimageView，在这里命名为imageleft，imagemiddle，imggeright，当tableView加载后，单击tableView中某一行中的image，我便进入该图片的详细页面。当然，现在的最新版支持手势控件，只要拖一个这样的控件到UIImageView上，实现它的委托就可以了。若版本太低不支持这样的控件，你便只好老老实实的亲手写代码了。
UITapGestureRecognizer和UIButton的点击事件冲突的解决办法

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch

{

if ([touch.view isKindOfClass:[UIButton class]])

{

return NO;

}

return YES;

}

常用手势：

UITapGestureRecognizer

UITapGestureRecognizer
UIPinchGestureRecognizer
UIRotationGestureRecognizer
UISwipeGestureRecognizer
UIPanGestureRecognizer
UILongPressGestureRecognizer

分別是 Tap（点一下）、Pinch（二指往內或往外拨动）、Rotation（旋转）、Swipe（滑动，快速移动）、Pan （拖移，慢速移动）以及 LongPress（长按）。

以下是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: }