檢測CAShapeLayer觸摸

Question

我創建了一個蜘蛛圖由overiding畫矩形，我使用的核心grahics CAShapeLayer畫出我的領域，有其在屏幕上創建多個CAShapeLayer地區，我想檢測時，這層被觸摸用戶接觸...但我無法弄清楚如何？

Answer 1

首先，你不應該畫在各層drawRect這個，但是這不是你的問題。要識別「感動」，你可以做這樣的事情了一層......

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    for (UITouch *touch in touches) { 
     CGPoint touchLocation = [touch locationInView:self.view]; 
     for (id sublayer in self.view.layer.sublayers) { 
      BOOL touchInLayer = NO; 
      if ([sublayer isKindOfClass:[CAShapeLayer class]]) { 
       CAShapeLayer *shapeLayer = sublayer; 
       if (CGPathContainsPoint(shapeLayer.path, 0, touchLocation, YES)) { 
        // This touch is in this shape layer 
        touchInLayer = YES; 
       } 
      } else { 
       CALayer *layer = sublayer; 
       if (CGRectContainsPoint(layer.frame, touchLocation)) { 
        // Touch is in this rectangular layer 
        touchInLayer = YES; 
       } 
      } 
     } 
    } 
}