SpriteKit - didBecomeActive 时不显示暂停屏幕 [英] SpriteKit - Pause screen doesn't show when didBecomeActive

问题描述

我的暂停系统在游戏内部完美运行，而且当应用程序移至后台然后再次激活时，游戏保持暂停状态，但我现在的问题是当它激活时我的暂停屏幕不显示.

My pause system works perfectly from inside the game, and also when the app moves to the background and then becomes active again the game stays paused, but my problem now is when it becomes active my pause screen doesn't show.

应用程序委托:

func applicationDidBecomeActive(application: UIApplication) {

    NSNotificationCenter.defaultCenter().postNotificationName("Pause", object: nil)

}

视图控制器:

override func viewDidLoad() {
        super.viewDidLoad()

        let scene  = GameScene()
        // Configure the view.
        let skView =  self.view as! MainView

        NSNotificationCenter.defaultCenter().addObserver(skView, selector: "setStayPaused", name: "Pause", object: nil)

        skView.ignoresSiblingOrder = true
        scene.scaleMode = .AspectFill
        scene.size = skView.bounds.size

        skView.presentScene(scene)
    }

MainView(我的自定义 skView):

MainView (My custom skView):

class MainView: SKView {

    var stayPaused = false as Bool

    override var paused: Bool {
        get {
            return super.paused
        }
        set {
            if (!stayPaused) {
                super.paused = newValue
            }
            stayPaused = false
        }
    }

    func setStayPaused() {
        if (super.paused) {
            self.stayPaused = true
        }
    }
}

游戏场景:

  override func didMoveToView(view: SKView) {
     NSNotificationCenter.defaultCenter().addObserver(self, selector: "pauseGame", name: "Pause", object: nil)
}

func pauseGame() {

        if isFirstTime == false { // to make sure that the app did not just get launched

            pauseScreen.hidden = false // doesn't show
            pauseButton.hidden = false // doesn't show
            view?.paused = true
            scene?.paused = true
        }
}

推荐答案

设置暂停屏幕和按钮的隐藏属性无效，因为视图和/或场景已暂停.您需要暂时取消暂停视图，将隐藏属性设置为 false，返回主循环，然后重新暂停视图.下面是如何做到这一点的示例.

Setting the pause screen's and button's hidden property has no effect because the view and/or scene is paused. You will need to temporarily un-pause the view, set the hidden properties to false, return the main loop, and then re-pause the view. Here's an example of how to do that.

应用程序委托:

func applicationWillResignActive(application: UIApplication) {        
    NSNotificationCenter.defaultCenter().postNotificationName("PauseViewNotification", object:nil)
}

func applicationDidBecomeActive(application: UIApplication) {
    NSNotificationCenter.defaultCenter().postNotificationName("ShowPauseScreenNotification", object:nil)
}

MainVew(SKView 子类):

MainVew (SKView subclass):

class MainView: SKView {
    override var paused: Bool {
        get {
            return super.paused
        }
        set {

        }
    }

    func pause() {
        super.paused = true
    }

    func resume() {
        super.paused = false
    }

    func togglePause() {
        super.paused = !super.paused
    }
}

视图控制器:

override func viewDidLoad() {
    super.viewDidLoad()

    if let scene = GameScene(fileNamed:"GameScene") {

        // Configure the view.
        let skView = self.view as! MainView

        NSNotificationCenter.defaultCenter().addObserver(skView, selector:Selector("pause"), name: "PauseViewNotification", object: nil)
    }
}

游戏场景:

override func didMoveToView(view: SKView) {
    NSNotificationCenter.defaultCenter().addObserver(self, selector:Selector("pauseGame"), name: "ShowPauseScreenNotification", object: nil)
}

func pauseGame() {
    if (!isFirstTime) {
        pauseScreen.hidden = false
        pauseButton.hidden = false
        // Un-pause the view so the screen and button appear
        if let customView = self.view as? MainView {
            customView.resume()
        }
        // Re-pause the view after returning to the main loop
        let pauseAction = SKAction.runBlock({
            [weak self] in
            if let customView = self?.view as? MainView {
                customView.pause()
            }
        })
        runAction(pauseAction)
    }
    isFirstTime = false
}

您可以使用

if let customView = self.view as? MyView {
    customView.togglePause()
}

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