ios - GameOver 后在 GameViewController 和 MainViewController 之间使用 Swift、SpriteKit、Segue

Question

我想在游戏结束后关闭 SKScene 并返回主菜单。

从MainViewController到GameViewController，我使用prepareForSegue制作了一个Storyboard Segue，以将一些数据从MainViewController传递到GameViewController

在 GameViewController 中，我做了这样的:

    override func viewDidLoad() {
    super.viewDidLoad()

    if let scene = GameScene(fileNamed:"GameScene") {
        let skView = self.view as! SKView
        skView.showsFPS = true
        skView.showsNodeCount = true

        skView.ignoresSiblingOrder = true

        scene.scaleMode = .AspectFill

        skView.presentScene(scene)

        scene.viewController = self

    }
}

然后，我在 GameScene.swift 中声明了 View Controller ，如下所示:

weak var viewController:GameViewController? = GameViewController()

我还在 GameScene.swift 中提供了以下函数来调用 endGameScene.swift:

    func endGame() {
    // 1
    gameOver = true

    // 2
    // Save high score
    GameState.sharedInstance.saveState()

    // 3
    let reveal = SKTransition.fadeWithDuration(0.5)
    let endGameScene = EndGameScene(size: self.size)
    self.view!.presentScene(endGameScene, transition: reveal)

}

最后，endGameScene.swift调用dismissViewControllerAnimated，如下所示:

weak var viewController:GameViewController? = GameViewController()       

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    // Transition back to the Game
    /*let reveal = SKTransition.fadeWithDuration(0.5)
    let gameScene = GameScene(size: self.size)
    self.view!.presentScene(gameScene, transition: reveal)*/

    print(viewController)
    self.viewController?.dismissViewControllerAnimated(true, completion: nil)

}

不幸的是， print(viewController) 返回 nil，当然，它不会关闭 ViewController。

我哪里出错了？

Answer 1

创建这样的函数

func goToGameScene(){
    let gameScene:GameScene = GameScene(size: self.view!.bounds.size) // create your new scene
    let transition = SKTransition.crossFadeWithDuration(1.5) // create type of transition (you can check in documentation for more transtions)
    gameScene.scaleMode = SKSceneScaleMode.Fill
    self.view!.presentScene(gameScene, transition: transition)
}

然后只需在您希望发生此转换的任何位置调用 goToGameScene() 即可。

您无需忽略任何内容，因为每次转换时它都会创建一个新场景。