ios - 从 GameViewController 到 GameScene 访问按钮、标签和 uiimageview

Question

在我的 GameViewController 中，我有按钮标签和所有设置。在 viewDidLoad() 下，我已将标签和所有内容设置为 .hidden = true 并且我的 gameOver 内容位于我的 GameScene 文件中，我无法将按钮标签设置为 .hidden = true >。该按钮称为 backToMenu，如果我在 GameViewController 中的任何位置输入它，它会识别它，但是当我尝试在 GameScene 中输入 backToMenu.hidden = false 时，它会给我一个错误。有什么方法可以让我在 GameScene 中访问它们吗？

GameScene Code:

func gameOver() {

        bigBox.hidden = false
        backToMenu.hidden = false
        scoreLabel.hidden = false

        var alrentSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("MenuSelect", ofType: "mp3")!)

        AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, error: nil)
        AVAudioSession.sharedInstance().setActive(true, error: nil)

        var error: NSError?
        screenTapped = AVAudioPlayer(contentsOfURL: alrentSound, error: &error)
        screenTapped.prepareToPlay()
        screenTapped.stop()

        square1.removeFromParent()
        wallGen.stopWalls()
        //diamondGen.stopDiamonds()
        movingGround.stop()
        square1.stop()
        //square2.stop()


        // save current points label value
        let pointsLabel = childNodeWithName("pointsLabel") as! PPPointsLabel
        let highscoreLabel = childNodeWithName("highscoreLabel") as! PPPointsLabel


        if highscoreLabel.number < pointsLabel.number {
            highscoreLabel.setTo(pointsLabel.number)

            let defaults = NSUserDefaults.standardUserDefaults()
            defaults.setInteger(highscoreLabel.number, forKey: "highscore")
        }

    }

GameVieController Code:

@IBOutlet weak var bigBox: UIImageView!
    @IBOutlet weak var backToMenu: UIButton!
    @IBOutlet weak var scoreLabel: UILabel!



    @IBAction func backToMenuButton(sender: AnyObject) {

        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewControllerWithIdentifier("MainMenuViewController") as! UIViewController
        self.dismissViewControllerAnimated(true, completion: nil)

        var alrentSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("MenuSelect", ofType: "mp3")!)

        AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, error: nil)
        AVAudioSession.sharedInstance().setActive(true, error: nil)

        var error: NSError?
        screenTapped = AVAudioPlayer(contentsOfURL: alrentSound, error: &error)
        screenTapped.prepareToPlay()
        screenTapped.play()

    }

    override func viewDidLoad() {
        super.viewDidLoad()

        bigBox.hidden = true
        backToMenu.hidden = true
        scoreLabel.hidden = true


        // Configure the view
        let skView = view as! SKView


        // store a ref
       // gameScene.gameDelegate = self

        // Create and configure the scene
        gameScene = GameScene(size: skView.bounds.size)
        gameScene?.scaleMode = .AspectFill

        // Present the scene
        skView.presentScene(gameScene)
}

Answer 1

这是因为变量位于不同的类中。一种方法是声明变量类变量，如下所示

class var myVariable = // whatever

如果你想清理你的代码，你也可以有静态 getter，就像这样

static func getMyVariable() -> MyVariableType
{
    return myVariable
}

这样，变量就可以从任何地方访问，并且可以通过键入来访问它们

GameViewController.getMyVariable()

或

GameViewController.myVariable