雪碧没有出现

Question

我有一个精灵定义，它不会在我运行应用程序时出现。这里是我的代码和一些图像，以帮助找出错误：

import SpriteKit 

class GameScene: SKScene { 

    var SingleplayerButton: SKSpriteNode! = nil 

    override func didMoveToView(view: SKView) { 

     SingleplayerButton = SKSpriteNode(imageNamed: "Unknown") 
     SingleplayerButton.position = CGPoint(x: self.frame.midX, y: self.frame.midY) 
     SingleplayerButton.size = CGSize(width: 200, height: 50) 

    } 

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

     for touch: AnyObject in touches { 

      let location = touch.locationInNode(self) 

      if SingleplayerButton.containsPoint(location) { 



      } 

     } 

    } 

} 

Answer 1

你忘记addChild到场景