Swift SpriteKit委托模式

Question

I have been trying to learn how to use delegates recently and actually seem to understand it for the most part. However I have one problem.

I have 1 GameViewController, 1 StartScene and 1 MenuScene

In my GameViewController I have 2 methods that I would like to get called from MenuScene. So far I have been using NSNotification, which works fine but I am trying to use delegates.

So I have set up a protocol in MenuScene

 protocol MenuSceneDelegate {
 func gameOver()
 func showGameCenter()
}

I than referenced it like so

 var menuSceneDelegate: MenuSceneDelegate?

In GameViewController I added the MenuSceneDelegate at the top. All is very standard so far. However the main problem I have is that when I set the delegate in GameViewController like so

 let skView = view as! SKView!
    var scene = StartScene(size: skView.bounds.size)

    skView.ignoresSiblingOrder = true
    scene.scaleMode = .ResizeFill

    skView.presentScene(scene)

    scene.menuSceneDelegate = self   //Sets delegate to StartScene not MenuScene

it only applies to the StartScene. How can I set the GameViewController delegate from StartScene to MenuScene. Everything works fine if I would first present the MenuScene. However I present StartScene first and therefore I am trying to understand how I set the delegate to MenuScene.

I tried something like this below but it doesnt work and just doesnt seem right

 var menuScene = MenuScene(size: skView.bounds.size)
 menuScene.menuSceneDelegate = self

I would appreciate any help or support. Thank you very much

Answer 1

基本上解决方案是在我从开始场景变为游戏场景时设置委托，而不是在开始时。