用sprite套件游戏覆盖功能

Question

我正在从swift 1移植我的游戏，我无法弄清楚如何解决这个功能。我试图检测是否没有接触，这应该保持球静止。这是我的代码，并不断得到错误无效的touchesBegan重新声明。我不知道如何解决这个问题，我被困了一段时间，无法让球停止移动时，没有触及现在。请帮帮忙，谢谢

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { 
    // do nothing if ad is showing 
    if Ad.share().showing { 
     return 
    } 

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

    // change the speedXFirst of the ball if it starts 
    if start { 

     // start move 
     let moveRight = touchedLocation.x > CGRectGetMidX(self.frame) 
     let speedX = moveRight ? ballSpeedX : -ballSpeedX 
     ball.speedXFirst = speedX 

    } 

    // start game if it stops 
    else { 
     startGame() 
    } 

} 



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

    if start { 

     // stop move 
     ball.speedXFirst = 0 
    } 

Answer 1

如果球必须被当用户拆卸从屏幕的手指停了下来，大概要use：

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

或this，如果你需要知道触摸时被中断：

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