Question

我是编码的新手（就像我昨天开始做的那样）。我试图使相同的SpriteNode出现多次遵循相同的方法。例如，游戏开始时有一个节点对触摸作出反应，当你达到5点后，另一个出现，15点之后等等......我已经能够在5点产生一个spriteCopy;但是我无法让它像原始节点一样响应触摸。我确信这是一件非常简单的事情我只是没有经验。感谢。

到目前为止，这是我的代码：

class GameScene: SKScene {
var sprite: SKSpriteNode!
var touchPoint: CGPoint = CGPoint()
var touching: Bool = false
var score: Int = 0
let scoreTextNode = SKLabelNode(fontNamed: "Helvetica Neue UltraLight")

override func didMoveToView(view: SKView) {

    sprite = SKSpriteNode(imageNamed: "PongBall")
    sprite.position = CGPoint(x: 500,y: 500)
    sprite.size = CGSize(width: 75, height: 75)
    sprite.physicsBody = SKPhysicsBody(circleOfRadius: 37.5)
    self.addChild(sprite)

    scoreTextNode.text = "\(score)"
    scoreTextNode.fontSize = 70
    scoreTextNode.fontColor = SKColor.blackColor()
    scoreTextNode.position = CGPoint (x: 680.734, y: 700.941)
    self.addChild(scoreTextNode)
}



override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

    let touch = touches.first as UITouch!
    let location = touch.locationInNode(self)
    if sprite.frame.contains(location) {
        touchPoint = location
        touching = true
    }

    if touchPoint == location {
        self.score += 1
        self.scoreTextNode.text = "\(score)"
    }

    let spriteCopy = sprite.copy() as! SKSpriteNode
    if score == 5 {
        self.addChild(spriteCopy)
    }
}


override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {

    let touch = touches.first as UITouch!
    let location = touch.locationInNode(self)
    touchPoint = location


}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
    touching = false
}

override func update(currentTime: CFTimeInterval) {

    if touching {
        let dt:CGFloat = 1.0/30.0
        let distance = CGVector(dx: touchPoint.x-sprite.position.x, dy: touchPoint.y-sprite.position.y)
        let velocity = CGVector(dx: distance.dx/dt, dy: distance.dy/dt)
        sprite.physicsBody!.velocity=velocity
    }

}

}

Answer 1

您的问题是您的屏幕上出现了多个精灵，但您没有对它们执行任何操作。为了让事情变得简单，请采用这种方法。

class GameScene: SKScene {
  var sprite: SKSpriteNode!
  var touchPoint: CGPoint = CGPoint()
  var touching: Bool = false
  var score: Int = 0
  let scoreTextNode = SKLabelNode(fontNamed: "Helvetica Neue UltraLight")
  var spriteList = [SKSpriteNode]() //Add this line

  override func didMoveToView(view: SKView) {

    sprite = SKSpriteNode(imageNamed: "PongBall")
    sprite.position = CGPoint(x: 500,y: 500)
    sprite.size = CGSize(width: 75, height: 75)
    sprite.physicsBody = SKPhysicsBody(circleOfRadius: 37.5)
    self.addChild(sprite)
    spriteList.append(sprite)  //Add This line
    scoreTextNode.text = "\(score)"
    scoreTextNode.fontSize = 70
    scoreTextNode.fontColor = SKColor.blackColor()
    scoreTextNode.position = CGPoint (x: 680.734, y: 700.941)
    self.addChild(scoreTextNode)
  } 



   override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

     let touch = touches.first as UITouch!
     let location = touch.locationInNode(self)
     for sprite in spriteList{ //Add This line
         if sprite.frame.contains(location) {
           touchPoint = location
           touching = true
         }

         if touchPoint == location {
            self.score += 1
            self.scoreTextNode.text = "\(score)"
         } 

         let spriteCopy = sprite.copy() as! SKSpriteNode
         if score == 5 {
           self.addChild(spriteCopy)
           spriteList.append(spriteCopy)  //Add this line
         }
       } //Add this line
   }


   override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {

     let touch = touches.first as UITouch!
     let location = touch.locationInNode(self)
     touchPoint = location
   }
   override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
     touching = false
   }

   override func update(currentTime: CFTimeInterval) {

     if touching {
       for sprite in spriteList{ //Add this line
         let dt:CGFloat = 1.0/30.0
         let distance = CGVector(dx: touchPoint.x-sprite.position.x, dy: touchPoint.y-sprite.position.y)
         let velocity = CGVector(dx: distance.dx/dt, dy: distance.dy/dt)
         sprite.physicsBody!.velocity=velocity
       } //Add this line
     }
   }
 }

基本概念是将其保存在数组中。对于初学者来说这应该是一个很好的起点。在学习如何覆盖类之后，您可以了解触摸代码可以在精灵内部而不是在场景内部完成。这实际上是我的首选方法。

如何创建具有相同方法的“相同”SpriteNodes？

1 个答案: