當PinchGesture處於活動狀態時，RotationGesture不會調用

我有DrawingView並在其上偵聽UIPanGestureRecognizer，UIRotationGestureRecognizer和UIPinchGestureRecognizer。當PinchGesture處於活動狀態時，RotationGesture不會調用

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panDetected:)]; 
    [self.drawingView addGestureRecognizer:panRecognizer]; 

    UIRotationGestureRecognizer *rotateRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotateRecognizer:)]; 
    [self.drawingView addGestureRecognizer:rotateRecognizer]; 

    UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchRecognizer:)]; 
    [self.drawingView addGestureRecognizer:pinchRecognizer]; 
    [self.drawingView reloadData]; 
} 

-(void) pinchRecognizer:(UIPinchGestureRecognizer*) recognizer { 
    return; 
    NSLog(@"Call scale"); 
} 

- (void)rotateRecognizer:(UIRotationGestureRecognizer*)recognizer { 
    NSLog(@"Call rotaion"); 
}

如果我只選擇了UIRotationGestureRecognizer或UIPinchGestureRecognizer，那就完美了。但是如果使用UIRotationGestureRecognizer和UIPinchGestureRecognizer，則只調用UIPinchGestureRecognizer，而不調用UIRotationGestureRecognizer。我的代碼中有什麼問題？我想我會做一個UISegmented選擇模式，UIRotationGestureRecognizer或UIPinchGestureRecognizer，我該怎麼辦？

感謝很多

來源

2014-03-04 user3076539

僅供參考，您的NSCH在您的捏識別器方法是「返回」後，所以它不會打印出來。 –

如果你想有一次公認的多個姿勢，嘗試使用gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer，例如：

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

編輯：除了包括在.H代表，確保設置您的UIGestureRecognizer的委託的自我，例如：

UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panDetected:)]; 
panRecognizer.delegate = self; 
[self.drawingView addGestureRecognizer:panRecognizer]; 

UIRotationGestureRecognizer *rotateRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotateRecognizer:)]; 
rotateRecognizer.delegate = self; 
[self.drawingView addGestureRecognizer:rotateRecognizer];

來源

2014-03-04 01:00:54

我添加了功能到我的ViewControler.m並添加到ViewControler.h但問題沒有解決 – user3076539

你需要設置你的手勢的委託爲「自我」。在上面的編輯中添加。 –

使用requireGestureRecognizerToFail:識別手勢如果其他手勢識別器做不執行。

[rotateRecognizer requireGestureRecognizerToFail: pinchRecognizer];

來源

2014-03-04 11:08:46

當PinchGesture處於活動狀態時，RotationGesture不會調用

回答

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