iphone開發：手勢識別滾動同時啓用

Question

在我的應用程序中，我需要有一個滑動手勢識別器在我的背景滾動上方向。這是我下面

它是在viewDidLoad中

UISwipeGestureRecognizer *Swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipeRecognizer:)]; 
Swipe.direction = UISwipeGestureRecognizerDirectionUp; 
[backgroundScroller addGestureRecognizer:Swipe]; 

代碼，它是SwipeRecognizer：

- (void) SwipeRecognizer:(UISwipeGestureRecognizer *)sender { 
    if (sender.direction | UISwipeGestureRecognizerDirectionUp){ 
     NSLog(@" *** SWIPE UP ***"); 
    } 
} 

的問題是我不能啓用滾動功能，同時捕捉手勢。當我說滾動沒有啓用時，我可以識別手勢。但我需要同時滾動和手勢識別。這不可能嗎？

Answer 1

重寫gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:方法不阻斷UIScrollViews潘識別

，它會工作...

不要忘記委託添加到自手勢識別器。正如@ death7eater的評論所述。

Answer 2

我解決我的問題一樣，：

這是viewDidLoad中：

UISwipeGestureRecognizer *Swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipeRecognizer:)]; 
    Swipe.direction = UISwipeGestureRecognizerDirectionUp; 
    [backgroundScroller addGestureRecognizer:Swipe]; 
    Swipe.delegate = self; 

這是SwipeRecognizer方法：

- (void) SwipeRecognizer:(UISwipeGestureRecognizer *)sender { 
    if (sender.direction | UISwipeGestureRecognizerDirectionUp){ 
     NSLog(@" *** SWIPE UP ***"); 
    } 
} 

並感謝@lukaswelte這允許執行多個手勢同時進行：

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