iOS 基本手势

-(void)viewDidLoad{

UISwipeGestureRecognizer *recognizerRight; 

   recognizerRight = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
     [recognizerRight setDirection:(UISwipeGestureRecognizerDirectionRight)];
    [[self view] addGestureRecognizer:recognizerRight];

UISwipeGestureRecognizer *recognizerLeft;
    recognizerLeft = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
     [recognizerLeft setDirection:(UISwipeGestureRecognizerDirectionLeft)];
    [[self view] addGestureRecognizer:recognizerLeft];

UISwipeGestureRecognizer *recognizerUp;
    recognizerUP = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
     [recognizerUP setDirection:(UISwipeGestureRecognizerDirectionUp)];
    [[self view] addGestureRecognizer:recognizerUP];

UISwipeGestureRecognizer *recognizerDown;
    recognizerDown = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
     [recognizerDown setDirection:(UISwipeGestureRecognizerDirectionDown)];
    [[self view] addGestureRecognizer:recognizerDown];

}

-(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
}
}