只捕获UIView 2手指UIPanGestureRecognizer

我在我的视图控制器中有几个UIScrollView s。我想覆盖通过UIPanGestureRecognizer拍摄双指滑动的视图，该视图不会记录UIScrollView滑动手势。只捕获UIView 2手指UIPanGestureRecognizer

当我用双指手势手势在透明视图上显示我的内容时，未检测到我的轻敲和1个手指轻扫。我试图覆盖pointInside:方法返回NO 但它不记录我的2指滑动。

效果类似于用4根手指轻扫来改变应用程序。

来源

2013-04-30 Andy Jacobs

所以希望你scrollviews没有捕捉到2个手指挥笔滚动UIScrollView？ – peko 2013-04-30 15:08:38

多数民众赞成1部分我猜 – 2013-04-30 16:36:08

@AndyJacobs你想滚动视图来检测泛或不？你想添加躺在这将检测2手指锅和滚动视图来检测其他锅右？如果我想错了，请澄清一下 – 2013-05-09 10:54:05

您不需要覆盖视图。
首先实现UIPanGestureRecognizer将处理2指平移，并将其分配到包含UIScrollView小号

UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] 
               initWithTarget:self 
                 action:@selector(handlePan:)]; 
panGestureRecognizer.delegate = self; 
panGestureRecognizer.minimumNumberOfTouches = 2; 
panGestureRecognizer.maximumNumberOfTouches = 2; 
[self.view addGestureRecognizer:panGestureRecognizer];

使用UIGestureRecognizerDelegate处理2指平移与UIScrollView平移手势

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer 
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer 
{ 
    return YES; 
}

最后，你有你的观点能够处理2个手指锅

- (void)handlePan:(UIPanGestureRecognizer *)gestureRecognizer 
{ 
    NSLog(@"pan"); 
}

如果你想停止时，检测到两个手指平移您可以禁用和启用UIScrollView泛识别

- (void)handlePan:(UIPanGestureRecognizer *)gestureRecognizer 
{ 
    if(gestureRecognizer.state == UIGestureRecognizerStateBegan) 
    { 
     _scrollView.panGestureRecognizer.enabled = NO; 
    } 
    if(gestureRecognizer.state == UIGestureRecognizerStateEnded) 
    { 
     _scrollView.panGestureRecognizer.enabled = YES; 
    } 
    NSLog(@"pan"); 
}

来源

2013-05-07 10:33:26

如果你不需要覆盖层，你可以用手势识别器来解决这个问题。我写这件事作为一个测试：

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    self.scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds]; 
    _scrollView.contentSize = CGSizeMake(self.view.bounds.size.width * 2, self.view.bounds.size.height); 

    UIView *green = [[UIView alloc] initWithFrame:self.view.bounds]; 
    [green setBackgroundColor:[UIColor greenColor]]; 

    UIView *blue = [[UIView alloc] initWithFrame:CGRectOffset(self.view.bounds, self.view.bounds.size.width, 0)]; 
    [blue setBackgroundColor:[UIColor blueColor]]; 

    [_scrollView addSubview:green]; 
    [_scrollView addSubview:blue]; 

    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(twoFingerPan:)]; 
    [pan setMinimumNumberOfTouches:2]; 
    [pan setMaximumNumberOfTouches:2]; 
    [pan setDelaysTouchesBegan:YES]; 

    [_scrollView addGestureRecognizer:pan]; 

    [self.view addSubview:_scrollView]; 
} 

- (void)twoFingerPan:(UIPanGestureRecognizer *)gesture { 
    switch (gesture.state) { 
     case UIGestureRecognizerStateBegan: 
      self.scrollView.scrollEnabled = NO; 
      break; 
     case UIGestureRecognizerStateCancelled: 
     case UIGestureRecognizerStateEnded: 
     case UIGestureRecognizerStateFailed: 
      self.scrollView.scrollEnabled = YES; 
      break; 
     default: 
      break; 
    } 
    NSLog(@"2 Fingers!"); 
}

我得到的twoFingerPan:回拨当使用2个手指。滚动视图的panGestureRecognizer仍然在这一点上工作，所以我禁用滚动视图上的滚动来处理2个手指锅。我发现这种方法工作很好。一种不可思议的事情是，如果滚动视图正在减速，则不会调用2手指手势识别器。希望有所帮助！

来源

2013-05-04 15:55:28 CEarwood

只捕获UIView 2手指UIPanGestureRecognizer

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