iOS相應觸屏事件代碼

//在一個函數里面（初始化等）里面添加要識別觸摸事件的范圍
    infoView=[[UIView alloc] initWithFrame:CGRectMake(20, 100,220, 280)];//范圍，出了這個范圍就檢測不到觸摸了
    infoView.backgroundColor=[UIColor blueColor];
    infoView.alpha=0.6;
    [self.view addSubview:infoView];
    /**監視手勢控制*///有上下左右，我只用到了左右，上下注掉了。
    UISwipeGestureRecognizer *recognizer;
    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
    [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];
    [infoView addGestureRecognizer:recognizer];
//    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
//    [recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];
//    [self.view addGestureRecognizer:recognizer];
//    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
//    [recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)];
//    [self.view addGestureRecognizer:recognizer];
    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
    [recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];
    [infoView addGestureRecognizer:recognizer];

//觸摸事件 的實現函數
//滑動事件1
-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer{
    //如果往左滑
    if(recognizer.direction==UISwipeGestureRecognizerDirectionLeft) {
        NSLog(@"**向左滑**");
    }
    //如果往右滑
    if(recognizer.direction==UISwipeGestureRecognizerDirectionRight) {
        NSLog(@"**向右滑**");

    }
   if (recognizer.direction==UISwipeGestureRecognizerDirectionDown){
       NSLog(@"**向下滑**");
    }
    if (recognizer.direction==UISwipeGestureRecognizerDirectionUp){
      NSLog(@"**向上滑**");
   }
}
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