UITapGestureRecognizer on SKNode:将坐标从UIView转换为SKNode

Question

我有一个UITapGestureRecognizer和一个UIPanGestureRecognizer在一个UIView和一个SKScene在它上面。pan手势识别器将一个SKNode从左向右移动，我希望Tap手势识别器检测到一个pan的子SKNode。平移操作很好，但我在检测抽头时遇到了问题-- Tap手势触发了相关的方法，但我不知道如何将坐标从视图转换到节点，以检测其中一个子节点中的抽头是否存在。

UIView (带有手势)→SKScene→摇摄节点→摇摄节点的子节点

如何检查一个点击手势的触摸坐标是否是给定的SKNode？

-(void)tapAction:(UITapGestureRecognizer*)sender{
if (sender.state == UIGestureRecognizerStateEnded)
{
    // handling code
    CGPoint touchLocation = [sender locationOfTouch:0 inView:sender.view];
    NSLog(@"TAP %@", NSStringFromCGPoint(touchLocation)
          );
    for (SKLabelNode *node in _containerNode.children) {

        if ([node containsPoint:[node convertPoint:touchLocation fromNode:self.parent]]) {
            //This is where I want the tap to be detected.
        }

        CGPoint checkPoint = [node convertPoint:touchLocation fromNode:self.scene];
        NSLog(@"CheckPoint %@", NSStringFromCGPoint(checkPoint)
              );
        //NSLog(@"iterating nodes");
        if ([node containsPoint:checkPoint]) {
            NSLog(@"touch match %@", node);

        }
    }
}

}

Answer 1

最后，我需要从建议中再执行几个步骤--从SKView→SKScene转换到包含被命中测试节点的SKNode。

    CGPoint touchLocation           = [sender locationOfTouch:0 inView:sender.view];
    CGPoint touchLocationInScene    = [[self.scene view] convertPoint:touchLocation toScene:self.scene];
    CGPoint touchLocationInNode     = [self.scene convertPoint:touchLocationInScene toNode:_containerNode];

Answer 2

您应该使用convertPointFromView:将视图坐标转换为场景坐标

CGPoint touchLocationInView = [sender locationOfTouch:0 inView:sender.view];
CGPoint touchLocationInScene = [self convertPointFromView:touchLocationInView];

然后，您可以检测到哪个标签节点被点击，

for (SKLabelNode *node in self.children) {

    if ([node containsPoint:touchLocationInScene]) {
        //This is where I want the tap to be detected.
    }

}

Answer 3

我以前没有使用过SceneKit，但是从文档来看，您似乎需要使用SKView方法convertPoint:toScene:将手势识别器的点击坐标从视图坐标转换为场景坐标。然后，您需要点击测试场景中的节点，以确定哪个节点被点击。