刷卡XCode的實時反饋

Question

我已經設法改變UISwipeGestureRecognizer的意見，但它只是在我完成刷卡後開始改變視圖。當我開始在屏幕上拖動我的手指時，如何才能使它開始？我搜索了但找不到答案。

Answer 1

手勢識別器將等待，直到確定做出了哪個手勢。這就是爲什麼他們總是有一點延遲。這樣做的一種方法是實現您自己的滑動處理程序。例如。您可以使用touchesBegan：touchesEnded：touchesMoved：和TouchesCancelled： - 方法。

（記住啓用userInteractionEnabled屬性的節點（S），以使這些方法）

// SKScene init 
{ 
    self.userInteractionEnabled = YES; 
} 

- (void) touchesBegan:(NSSet*) touches withEvent:(UIEvent*)event 
{ 
    // register that touch(es) began 
} 

- (void) touchesMoved:(NSSet*) touches withEvent:(UIEvent*)event 
{ 
    // Calculate which way touch(es) is/are moving 
} 

- (void) touchesEnded:(NSSet*) touches withEvent:(UIEvent*)event 
{ 
    // Register that touch(es) ended 
} 

Answer 2

使用全景手勢

 UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)]; 
    [self addGestureRecognizer:pan]; 

然後做：

- (void)handlePan:(UIPanGestureRecognizer *)gesture { 

    CGPoint touchPoint = [gesture locationInView:YOUR_VIEW]; 
    UIView *draggedView = [gesture view]; 

    switch ([gesture state]) { 

     case UIGestureRecognizerStateBegan:  
      break; 

     case UIGestureRecognizerStatePossible: 

      break; 

     case UIGestureRecognizerStateChanged: 
      break; 

     case UIGestureRecognizerStateEnded: 
      break; 

     case UIGestureRecognizerStateCancelled: 
      break; 

     case UIGestureRecognizerStateFailed: 
      break; 

     default: 
      break; 
    } 
}