SpriteKit，返回主菜单按钮

Question

我在实现一个将您从 GameScene 转到主菜单的按钮时遇到了问题。

这是我的 GameScene 代码：

let stoneLayer: SKNode = SKNode()
let cardLayer: SKNode = SKNode()
let menuPausaLayer: SKNode = SKNode()

class GameScene: SKScene {

override func didMoveToView(view: SKView) {
    /* Setup your scene here */
    backgroundColor = SKColor.blackColor()

    addChild(stoneLayer)
    addChild(cardLayer)
    addChild(menuPausaLayer)

    //Creazione posizioni carte
    for i in 0...15 {
        let cardLocation = SKSpriteNode(color: .orangeColor(), size: CGSize(width: cardWidth, height: cardHeight))
        cardLocation.position = CGPointMake(cardLocPosition[i].x, cardLocPosition[i].y)
        cardLocation.texture = SKTexture(imageNamed: "location")
        cardLocation.zPosition = -90
        addChild(cardLocation)
        //grid[i] = 0
    }

    //Pulsanti
    pauseButton.position = pauseButtonPosition
    addChild(pauseButton)


    loadDeck()

}

当我暂停游戏时，我将 exitButton 添加到 menuPausaLayer。这是我用于此按钮的代码：

let exitButton = button(buttonTexture: "pauseMenuButton", 
                        buttonWidth: menuPausaBottonWidth, 
                        buttonHeight: menuPausaBottonHeight, 
                        action: {exit()}
})

func exit() {
    print("Back to Main Menu")

    let newScene = MainMenuScene(size: UIScreen.mainScreen().bounds.size)
    newScene.scaleMode = .AspectFill
    scene?.view?.presentScene(newScene)   
}

但它没有用...有一种方法可以创建一个函数来在 SKScene 之外更改场景 class??提前致谢:)

更新：这里是我用于按钮的自定义 class：

class button: SKSpriteNode {

//NSCoder non supportato
required init(coder aDecoder: NSCoder) {
    fatalError("NSCoding not supported")
}

var buttonTexture: SKTexture
var buttonWidth: CGFloat
var buttonHeight: CGFloat
var action: () -> Void

init(buttonTexture: String, buttonWidth: CGFloat, buttonHeight: CGFloat, action: () -> Void) {

    self.buttonTexture = SKTexture(imageNamed: buttonTexture)
    self.buttonWidth = buttonWidth
    self.buttonHeight = buttonWidth
    self.action = action

    super.init(texture: self.buttonTexture, color: .whiteColor(), size: CGSize(width: buttonWidth, height: buttonHeight))
    userInteractionEnabled = true
}

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for _ in touches {

        let scale = SKAction.scaleTo(1.1, duration: 0.1)
        runAction(scale)
    }
}

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

        let location = touch.locationInNode(scene!)
        let touchedNode = nodeAtPoint(location)

        let scale = SKAction.scaleTo(1.0, duration: 0.1)
        runAction(scale)

        if touchedNode.containsPoint(location) {
           action()
        }

    }
}

Answer 1

正如向 Apple documents 解释的那样，SKNode 也有一个名为 parent 的属性，因此 SKSpriteNode 继承自 SKNode 然后在您的 class button: SKSpriteNode（即在你的代码中直接添加到场景中）你可以这样做：

if let parent = self.parent where parent is SKScene {
   let pScene = parent as! SKScene
   // do whatever you want with your scene
}

Answer 2

您真的不应该从 SKScene 访问 ViewController 相关操作，而这正是您想要做的。相反，您的情节提要中应该有 UI 相关操作。

但是，您可以从 SKScene 访问父视图控制器。

使用This example你可以得到视图控制器如下：

extension UIView {
    var parentViewController: UIViewController? {
        var parentResponder: UIResponder? = self
        while parentResponder != nil {
            parentResponder = parentResponder!.nextResponder()
            //swift 3: parentResponder = parentResponder!.next()
            if let viewController = parentResponder as? UIViewController {
                return viewController
            }
        }
        return nil
    }
}

然后在你的游戏场景中你会使用

(view!.parentViewController as! GameViewController).dismiss(animated: true, completion: nil)

在一个节点中，您将使用：

(scene!.view!.parentViewController as! GameViewController).dismiss(animated: true, completion: nil)

或者您可以向视图控制器添加自定义函数来执行上述操作。

Swift 3代码在上面的评论里

同样，不推荐。您应该 UI 制作故事板并离开游戏场景来玩游戏。导航控制器是一种理想的方式。

Answer 3

使用下面的函数都可以正常使用！谢谢！

func exit() {
print("Back to Main Menu")

if let parent = exitButton.parent where parent is SKScene {
    let parentScene = parent as! SKScene
    // do whatever you want with your scene
    print ("YES")

    let skView = parentScene.view! as SKView
    skView.showsFPS = true
    skView.showsNodeCount = true
    skView.multipleTouchEnabled = false

    /* Sprite Kit applies additional optimizations to improve rendering performance */
    skView.ignoresSiblingOrder = true

    /* Set the scale mode to scale to fit the window */
    let mainMenuScene = MainMenuScene(size: skView.bounds.size)
    mainMenuScene.scaleMode = .ResizeFill //.AspectFill

    skView.presentScene(mainMenuScene)

}

SpriteKit，返回主菜单按钮

SpriteKit, Back to Main Menu Button

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swift2