SpriteKit: UIGestureRecognizer hinzufügen und feststellen, welcher Knoten kopiert wurde

Question

In welcher Methode füge ich einen UIGestureRecognizer zu meinem SKScene hinzu. Und wie finde ich heraus, welcher Knoten kopiert wurde? Dies gilt nicht zu funktionieren scheint:

-(id)initWithSize:(CGSize)size {  
    if (self = [super initWithSize:size]) { 

    ... 

    UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)]; 
    recognizer.direction = UISwipeGestureRecognizerDirectionUp; 
    [[self view] addGestureRecognizer:recognizer]; 

    } 
    return self; 
} 

Answer 1

Sie fügen die UISwipeGestureRecognizer in dieser Methode:

- (void)didMoveToView:(SKView *)view 
{ 
    UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)]; 
    recognizer.direction = UISwipeGestureRecognizerDirectionUp; 
    [[self view] addGestureRecognizer:recognizer]; 
} 

Und das ist, wie Sie erkennen, welche SKNode geklaut wurde:

- (void)handleSwipe:(UISwipeGestureRecognizer *)sender 
{ 
    if (sender.state == UIGestureRecognizerStateEnded) 
    { 
     CGPoint touchLocation = [sender locationInView:sender.view]; 
     touchLocation = [self convertPointFromView:touchLocation]; 
     SKSpriteNode *touchedNode = (SKSpriteNode *)[self nodeAtPoint:touchLocation]; 

     NSLog(@"%@", touchedNode); 
    } 
} 

Answer 2

Swift 3 Version inspiriert von SE Antwort:

func didSceneViewPan(_ sender: UIPanGestureRecognizer) { 
    if sender.state == .began { 

     let touchPoint = sender.location(in: sender.view) 
     let touchLocation = convertPoint(fromView: touchPoint) 

     if isPointInNode(point: touchLocation, node: testNode) { 
      print("yes, node touched!") 
     } else { 
      print("no bueno :(") 
     } 
    } 
} 


fileprivate func isPointInNode(point: CGPoint, node: SKNode) -> Bool { 
    // Get all nodes intersecting <point> 
    let nodes = self.nodes(at: point) 

    // Return true on first one that matches <node> 
    for n in nodes { 
     if n == node { 
      return true 
     } 
    } 

    // If here, <point> not inside <node> so return false 
    return false 
} 

Answer 3

Sie können an einer Stelle der Knoten überprüfen umfassen einen Knoten Sie für die Verwendung dieser Suche:

nodes(at: touchLocation).contains(nodeYouAreLookingFor) 

Answer 4

Für 2017 ...

Sagen Sie eine Szene mit verschiedenen Sprites haben.

Tippen Sie auf eine davon. Sie müssen wissen, was man abgehört wurde ...

class YourScene: SKScene { 
    override func didMove(to view: SKView) { 

     super.didMove(to: view) 

     // your setup for the scene - example, add objects etc 

     setupTapDetection() 
    } 

    func setupTapDetection() { 

     let t = UITapGestureRecognizer(target: self, action: #selector(tapped(_:))) 
     view?.addGestureRecognizer(t) 
    } 

    @objc func tapped(_ tap: UITapGestureRecognizer) { 

     // critical... 
     if tap.state != .ended { return } 

     // Note: you actually do NOT "invert the Y axis", 
     // these two calls in fact take care of that properly. 
     let viewPoint = tap.location(in: tap.view) 
     let scenePoint = convertPoint(fromView: viewPoint) 

     // technically there could be more than one node... 
     let nn = nodes(at: scenePoint) 

     if nn.count == 0 { 

      print("you very like tapped 'nowhere'") 
      return 
     } 

     if nn.count != 1 { 

      // in almost all games or physics scenes, 
      // it is not possible this would happen 
      print("something odd happened - overlapping nodes?") 
      return 
     } 

     // you must have a custom class for your sprites 
     // Say it is class YourSprites: SKSpriteNode 

     if let dotSpriteTapped = nn.first! as? YourSprites { 

      // we are done. dotSpriteTapped is the YourSprite, 
      // which was tapped. now do whatever you want. 

      let nm = String(describing: dotSpriteTapped.name) 
      print(" \(nm)") 

      // you can now access your own properties: 

      let whichTank = dotSpriteTapped.someID 
      print(" \(whichTank)") 

      let tankPower = dotSpriteTapped.sheildStrength 
      print(" \(tankPower)") 
     } 
    }