UISwipeGestureRecognizer不會掉下來

Question

如何識別UISwipeGestureRecognizer與UISwipeGestureRecognizerDirectionUp，然後直接在此之後，無需擡起手指，識別出UISwipeGestureRecognizerDirectionDown識別器？

基本上我想要多個UISwipeGestureRecognizers在我改變方向時不會擡起手指。

到目前爲止我的代碼...

- (void)viewDidLoad {   
     UISwipeGestureRecognizer *swipeUp = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(screenSwipedUp)]; 
     swipeUp.numberOfTouchesRequired = 1; 
     swipeUp.direction = UISwipeGestureRecognizerDirectionUp; 
     swipeUp.cancelsTouchesInView = NO; 
     [self.view addGestureRecognizer:swipeUp]; 

     UISwipeGestureRecognizer *swipeDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(screenSwipedDown)]; 
     swipeDown.numberOfTouchesRequired = 1; 
     swipeDown.direction = UISwipeGestureRecognizerDirectionDown; 
     swipeDown.cancelsTouchesInView = NO; 
     [self.view addGestureRecognizer:swipeDown]; 

    } 

    - (void)screenSwipedUp { 
     NSLog(@"SW-Up"); 
    } 

    - (void)screenSwipedDown { 
     NSLog(@"SW-Down"); 
    } 

Answer 1

我不認爲你可以UISwipeGestureRecognizer做到這一點。您可以改爲使用UIPanGestureRecognizer並實施該操作，或者創建UIGestureRecognizer和Override the methods的子類以識別您的特殊手勢。