Swift-呼叫中缺少参数“编码器”的参数

Question

Im am trying to pause or stop an SKAction that is being repeated forever which should happen when the user presses the pause button. I have found a way to stop the music but i cant call the function it is in because of this error. It says exactly: Missing argument for parameter 'coder' in call .

Class GameViewController: UIViewController, SwiftrisDelegate, UIGestureRecognizerDelegate     {

    @IBAction func didPause(sender: UIButton) {
        if self.scene.paused == false{
            self.scene.stopTicking()
            self.scene.paused = true
            GameScene().stopGameMusic() //error on this line
        }
    }
}

class GameScene: SKScene {

    runAction(SKAction.playSoundFileNamed("theme.mp3", waitForCompletion: true), withKey:("themeSong"))

    func stopGameMusic() {
        removeActionForKey("themeSong")
    }
 }

Answer 1

There is no initializer for GameScene that takes no arguments - you haven't defined one nor is one inherited from SKScene . If you intend to create a GameScene each time 'pause' is pushed, which is a questionable approach in itself, then you'll need to call an existing initializer or to create an initializer w/o any arguments.

It looks like the designated initializer for SKScene is init(size: CGSize) . So instead of simply calling GameScene() call GameScene(size: ...) or, in the class GameScene define

class GameScene : SKScene {
  // ... 

  init () {
    super.init (size: ...)
  }
}