设置SwipeGestureRecognizer，需要说明

我错过了一些简单的东西，请帮我理解一下。设置SwipeGestureRecognizer，需要说明

我控制器建立

UIGestureRecognizer *swipe = [[UIGestureRecognizer alloc] 
      initWithTarget:gameView action:@selector(handleSwipeFrom:)]; 
[gameView addGestureRecognizer:swipe];

的GameView设置

@interface GameView : UIView<UIGestureRecognizerDelegate>

它还声明

- (IBAction) handleSwipeFrom:(UISwipeGestureRecognizer*)recognizer;

并将其设置为

- (IBAction)handleSwipeFrom:(UISwipeGestureRecognizer*)recognizer { 
    NSLog(@" .............. Swipe detected!! ..................."); 
}

的故事板链接UIGestureRecognizer这个IBACtion，并设置如下： enter image description here

我有点担心，UIGestureRecognizer出现一个控制器的下方，而不是视图，如图所示，但我可以似乎无法纠正它。

enter image description here

当应用程序建立起来，挥笔，但无法识别。

请提出我在这里想念的是什么，以及我是否正确设置事情。

来源

2012-03-14 JAM

你INITING一个UIGestureRecognizer而不是UISwipeGestureRecognizer的次为一 – Brodie 2012-03-14 01:11:32

您正在设置两个单独的手势识别器。一个代码可能什么也不做，另一个代码可能没有目标。

在代码中，你应该初始化轻扫手势识别，像这样：

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:gameView action:@selector(handleSwipeFrom:)]; 
// And assuming the "Up" direction in your screenshot is no accident 
swipe.direction = UISwipeGestureRecognizerDirectionUp;

或者，当然了，你可以在故事板连接刷卡识别。这很容易通过右键单击手势识别器并将SentActions连接到handleSwipeFrom:方法来完成，或者类似地，您可以从右侧的连接检查器（如截图所示）拖动到指定的函数。在图像中，您可以看到我的Sent Actions已连接到方法swipeTarget:。

enter image description here

但是目前你有两个不完整的识别。

来源

2012-03-14 01:11:52 NJones

优秀。非常感谢你NJones – JAM 2012-03-14 01:20:33

没问题。乐于帮助。 – NJones 2012-03-14 01:24:06

UISwipeGestureRecognizer *swipe = [[UISwipGestureRecognizer alloc] 
     initWithTarget:gameView action:@selector(handleSwipeFrom:)]; 
    [gameView addGestureRecognizer:swipe]; 


- (IBAction)handleSwipeFrom:(UISwipeGestureRecognizer*)recognizer { 
    NSLog(@" .............. Swipe detected!! ..................."); 
}

然后撤消你在IB所做的事情。如果你在代码中完成，然后做在IB过你只是重复工作，也许加倍刷卡的处理

来源

2012-03-14 01:21:32 Brodie

-(void)addSwipeEvent:(UIView*)subView{ 

    UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipeRecognizer:)]; 
    recognizer.numberOfTouchesRequired = 1; 
    recognizer.delegate = self; 
    [subView addGestureRecognizer:recognizer]; 
    [recognizer release]; 

    UISwipeGestureRecognizer *leftRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipeRecognizer:)]; 
    leftRecognizer.direction=UISwipeGestureRecognizerDirectionLeft; 
    leftRecognizer.numberOfTouchesRequired = 1; 
    leftRecognizer.delegate = self; 
    [subView addGestureRecognizer:leftRecognizer]; 
    [leftRecognizer release]; 

    UISwipeGestureRecognizer *downRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipeRecognizer:)]; 
    downRecognizer.direction=UISwipeGestureRecognizerDirectionDown; 
    downRecognizer.numberOfTouchesRequired = 1; 
    donwRecognizer.delegate = self; 
    [subView addGestureRecognizer:downRecognizer]; 
    [downRecognizer release]; 

    UISwipeGestureRecognizer *upRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipeRecognizer:)]; 
    upRecognizer.direction=UISwipeGestureRecognizerDirectionUp; 
    upRecognizer.numberOfTouchesRequired = 1; 
    upRecognizer.delegate = self; 
    [subView addGestureRecognizer:upRecognizer]; 
    [upRecognizer release]; 
} 

- (void) SwipeRecognizer:(UISwipeGestureRecognizer *)sender { 
    if (sender.direction == UISwipeGestureRecognizerDirectionLeft){ 
     NSLog(@" *** SWIPE LEFT ***"); 

    } 
    if (sender.direction == UISwipeGestureRecognizerDirectionRight){ 
     NSLog(@" *** SWIPE RIGHT ***"); 

    } 
    if (sender.direction== UISwipeGestureRecognizerDirectionUp){ 
     NSLog(@" *** SWIPE UP ***"); 

    } 
    if (sender.direction == UISwipeGestureRecognizerDirectionDown){ 
     NSLog(@" *** SWIPE DOWN ***"); 

    } 
} 


- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch { 
    if ([touch.view isKindOfClass:[UIView class]]) 
    { 
     return YES; 
    } 
    return NO; 
}

来源

2012-03-14 06:29:35 Vibhooti

在.h文件中实现UIGestureRecognizerDelegate委托。 – Vibhooti 2012-03-14 06:30:31

设置SwipeGestureRecognizer，需要说明

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