iphone - 设置SwipeGestureRecognizer进行uiview转换

Question

我的UIView转换方法遇到了一些麻烦，该方法正在侦听屏幕上的手势。

发生的是，如果我进行向左滑动或向右滑动，则会向我的@selector方法发送左右滑动信号..这意味着我无法区分滑动。

这是我有问题的代码。我尝试了一些不同的操作，但似乎无法正确解决这一问题。

- (void) setupSwipeGestureRecognizer {
        UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipedScreen:)];
        swipeGesture.direction = (UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight);
        [self.view addGestureRecognizer:swipeGesture];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    self.title = @"Prototype";
    //Initalizse the swipe gestuer listener
    [self setupSwipeGestureRecognizer];

    //alloc and init
    self.detailViewA = [[DetailViewController alloc]initWithNibName:@"DetailViewController" bundle:[NSBundle mainBundle]]; 
    self.detailViewB = [[DetailViewControllerB alloc]initWithNibName:@"DetailViewControllerB" bundle:[NSBundle mainBundle]];

    // set detail View as first view
    [self.view addSubview:self.detailViewA.view];

    // set up other views
    [self.detailViewB.view setAlpha:1.0f];

    // Add the view controllers view as a subview
    [self.view addSubview:self.detailViewB.view];

    // set these views off screen (right)
    [self.detailViewB.view setFrame:CGRectMake(320, 0, self.view.frame.size.width, self.view.frame.size.height)];    
}


- (void)swipedScreen:(UISwipeGestureRecognizer*)gesture
{
    if (gesture.direction = UISwipeGestureRecognizerDirectionLeft) {
        NSLog(@"Left");
    }
   if (gesture.direction = UISwipeGestureRecognizerDirectionRight){
       NSLog(@"Right");
   }

}

Answer 1

类似的问题here和here。
swipedScreen:方法的参数类型为UISwipeGestureRecognizer，即导致调用回调的识别器。它不涉及用户做出的任何实际手势。在您的情况下，可以将此识别器的direction属性设置为(UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight)-这不会更改。

您将必须创建两个识别器，每个方向一个。