最近在项目中用到了手势操作，键盘回收时还是挺常用的，现在总结下，多谢网络上大神们的分享。
先分享下我在项目中用的代码：
我要评论uitapgesturerecognizer * mytap=[[uitapgesturerecognizer alloc]initwithtarget:self action:@selector(tap_gesturerecognizer:)];
[self addgesturerecognizer:mytap];
[mytap release];
//收回键盘
-(void)tap_gesturerecognizer:(uitapgesturerecognizer *)tap_gest
{
[self.scv_stockpricetextfield resignfirstresponder];
[self.scv_stockamouttextfield resignfirstresponder];
}
//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：
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。
uikit中包含了uigesturerecognizer类，用于检测发生在设备中的手势。uigesturerecognizer是一个抽象类，定义了所有手势的基本行为，它有下面一些子类用于处理具体的手势：
1、拍击uitapgesturerecognizer (任意次数的拍击)
2、向里或向外捏uipinchgesturerecognizer (用于缩放)
3、摇动或者拖拽uipangesturerecognizer
4、擦碰uiswipegesturerecognizer (以任意方向)
5、旋转uirotationgesturerecognizer (手指朝相反方向移动)
6、长按uilongpressgesturerecognizer
对于不同类型的手势识别器，具有不同的配置属性。比如uitapgesturerecognizer，可以配置拍击次数。界面接收到手势之后，可以发送一 个消息，用于处理响应手势动作后的任务。当然，不同的手势识别器，发送的消息方法也会有所不同。
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