只捕獲UIView 2手指UIPanGestureRecognizer

我在我的視圖控制器中有幾個UIScrollView s。我想覆蓋通過UIPanGestureRecognizer拍攝雙指滑動的視圖，該視圖不會記錄UIScrollView滑動手勢。只捕獲UIView 2手指UIPanGestureRecognizer

當我用雙指手勢手勢在透明視圖上顯示我的內容時，未檢測到我的輕敲和1個手指輕掃。我試圖覆蓋pointInside:方法返回NO 但它不記錄我的2指滑動。

效果類似於用4根手指輕掃來改變應用程序。

來源

2013-04-30 Andy Jacobs

所以希望你scrollviews沒有捕捉到2個手指揮筆滾動UIScrollView？ – peko 2013-04-30 15:08:38

多數民衆贊成1部分我猜 – 2013-04-30 16:36:08

@AndyJacobs你想滾動視圖來檢測泛或不？你想添加躺在這將檢測2手指鍋和滾動視圖來檢測其他鍋右？如果我想錯了，請澄清一下 – 2013-05-09 10:54:05

您不需要覆蓋視圖。
首先實現UIPanGestureRecognizer將處理2指平移，並將其分配到包含UIScrollView小號

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處理2指平移與UIScrollView平移手勢

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

最後，你有你的觀點能夠處理2個手指鍋

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

如果你想停止時，檢測到兩個手指平移您可以禁用和啓用UIScrollView泛識別

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

來源

2013-05-07 10:33:26

如果你不需要覆蓋層，你可以用手勢識別器來解決這個問題。我寫這件事作爲一個測試：

- (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:回撥當使用2個手指。滾動視圖的panGestureRecognizer仍然在這一點上工作，所以我禁用滾動視圖上的滾動來處理2個手指鍋。我發現這種方法工作很好。一種不可思議的事情是，如果滾動視圖正在減速，則不會調用2手指手勢識別器。希望有所幫助！

來源

2013-05-04 15:55:28 CEarwood

只捕獲UIView 2手指UIPanGestureRecognizer

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