4个方向的手势 操作

- (void)handleSwipe:(UISwipeGestureRecognizer *)gesture {    UISwipeGestureRecognizerDirection direction = gesture.direction;    switch (direction) {        case UISwipeGestureRecognizerDirectionLeft:                         break;        case UISwipeGestureRecognizerDirectionDown:            break;        case UISwipeGestureRecognizerDirectionRight:            break;        case UISwipeGestureRecognizerDirectionUp:            break;        default:            break;    }} - (void)viewDidLoad{    //建立滑动手势    //设置滑动方向，下面以此类推    UISwipeGestureRecognizer *recognizer;         //向右滑动    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];    [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];    [[self view] addGestureRecognizer:recognizer];    [recognizer release];         //向左滑动    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];    [recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];    [[self view] addGestureRecognizer:recognizer];    [recognizer release];         //向上滑动    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];    [recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];    [[self view] addGestureRecognizer:recognizer];    [recognizer release];         //向下滑动    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];    [recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)];    [[self view] addGestureRecognizer:recognizer];    [recognizer release];}