iOS－响应上下左右滑动手势

-(void)viewDidLoad{

UISwipeGestureRecognizer *recognizer; 

recognizer = [[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(handleSwipeFrom:)];

    [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];

   [[selfview] addGestureRecognizer:recognizer];

[recognizerrelease];

    recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:selfaction:@selector(handleSwipeFrom:)];

    [recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];

   [[selfview] addGestureRecognizer:recognizer];

[recognizerrelease];

 recognizer = [[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(handleSwipeFrom:)];

    [recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];

   [[selfview] addGestureRecognizer:recognizer];

[recognizerrelease];

 

 UISwipeGestureRecognizer *recognizer;

    recognizer = [[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(handleSwipeFrom:)];

    [recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)];

   [[selfview] addGestureRecognizer:recognizer];

[recognizerrelease];

}

-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer{

if(recognizer.direction==UISwipeGestureRecognizerDirectionDown) {

      NSLog(@"swipe down");

//执行程序

}

if(recognizer.direction==UISwipeGestureRecognizerDirectionUp) {

      NSLog(@"swipe up");

//执行程序

}

if(recognizer.direction==UISwipeGestureRecognizerDirectionLeft) {

      NSLog(@"swipe left");

//执行程序

}

if(recognizer.direction==UISwipeGestureRecognizerDirectionRight) {

      NSLog(@"swipe right");

//执行程序

}

}