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如何从SKView或ViewController暂停SKScene

skscene sprite-kit uiviewcontroller swift ios

Andrey Derbenev · 技术社区 · 10 年前

我有以下代码暂停游戏场景:

class GameProcessScene: SKScene {
...
var onPause: Bool = false {
    willSet {
        self.paused = newValue
        self.view?.paused = newValue
    }
}
...
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    for touch in touches {
        let location = touch.locationInNode(self)
        let possiblePauseNode = self.nodeAtPoint(location)
        if (possiblePauseNode.name == "pauseButton") {
            if (self.paused) {
                onPause = false
            } else {
                onPause = true
            }
            return
        }
    ...
    }
}

按下按钮可以暂停。但我也想在游戏从后台出现时暂停。我正在尝试从ViewController类执行此操作:

override func viewDidLoad() {
    super.viewDidLoad()
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "pauseGameScene", name: UIApplicationWillEnterForegroundNotification, object: nil)
}
func pauseGameScene() {
    let view = self.view as SKView
    let scene = view.scene
    switch scene {
    case is MainMenuScene:
        println("MainMenu")
    case let game as GameProcessScene:
        game.onPause = true
    default:
        println("default")
    }
}
deinit {
    NSNotificationCenter.defaultCenter().removeObserver(self)
}

但当游戏出现在后台时,它就不起作用了。有人能帮忙吗?谢谢

UPD1:也尝试过 UIApplicationWillResignActiveNotification , UIApplicationDidEnterBackgroundNotification 但是 game.onPause = true 仍然不起作用。它将“SKScene.paused”属性更改为true,但当游戏进入前台时,动作仍在执行,即使游戏场景在进入后台之前已暂停。

UPD2:我将观察者和选择器从ViewController类移动到GameProcessScene:SKScene类——同样的效果,“暂停”属性更改,但实际上游戏仍在继续。

2 回复 | 直到 10 年前

rakeshbs 10 年前

我通过创建一个名为 isPaused 并覆盖 paused 属性始终遵循 已暂停 所有物 注意:这将禁止SKSCene在进入后台模式时自动暂停。您必须手动设置isPaused属性。因此,只在实际需要在恢复时使用暂停模式的场景中使用它。

class GameScene: SKScene,SKPhysicsContactDelegate {

       // Initializers

    var isPaused : Bool = false {
        didSet {
            self.paused = isPaused
        }
    }
     override var paused : Bool {
        get {
            return isPaused
        }
        set {
            super.paused = isPaused
        }
    }
}

在ViewController中

override func viewDidLoad() {
    super.viewDidLoad()
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "pauseGameScene", name: UIApplicationWillResignActiveNotification, object: nil)
}

func pauseGameScene() {
    println("will become inactive")
    let view = self.view as SKView
    let scene = view.scene
    switch scene {
    case let game as GameScene:
        game.isPaused = true
    default:
        println("default")
    }
}

szpetip 10 年前

你试过把你的代码

override func viewWillAppear(animated: Bool) {
    //Put your pauseGameScene(); code here
}

此方法在视图每次出现之前调用。viewDidLoad()仅在实例初始化后运行一次。