给页面添加手势

UISwipeGestureRecognizer *recognizer;

    

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

    [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];

    [[self view] addGestureRecognizer:recognizer];

    

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

    [recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];

    [[self view] 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];

    [self.view addGestureRecognizer:recognizer];