如何从 UIViewController 移动到 SKView，反之亦然？

Question

我的想法是在移动到游戏场景之前显示几秒钟的地图，游戏屏幕层次结构是这样的：

GameViewController(UIViewController) -> EntryToGameScene (SKView ) -> MapController (UIViewController) -> GamePlayGround (SKView)

我在从 MapController 移动到 GamePlayGround 时遇到了一个问题，为了能够从控制器移动到场景，我首先将控制器视图类从 Storyboard 更改为 SKView，然后我添加了以下代码 ⬇️。handleDelay() 方法之后运行，游戏场景didMove() 方法工作但屏幕卡在旧视图（MapController）上！？我确定游戏场景didMove() 方法有效，因为背景音乐开始播放。但是为什么屏幕没有变化？

我的代码是这样的：

override func viewDidLoad() {
    super.viewDidLoad()
    // Wait for three sec. then move to game scene
    self.perform(#selector(handleDelay), with: nil, afterDelay: 3.0)
}

@objc fileprivate func handleDelay() {

    view.layoutIfNeeded()

    if let view = self.view as! SKView? {
        // Load the SKScene
        let scene = GameScene(size: sceneSize)

        // Set the scale mode
        scene.scaleMode = .aspectFill
        scene.delegate = self
        // Present the scene
        view.presentScene(scene)

        view.ignoresSiblingOrder = true
        view.showsFPS = false
        view.showsNodeCount = false
        view.showsPhysics = false
    }
}

所有答案都可以接受。

Answer 1

从视图中删除所有子视图然后呈现 SKScene 的解决方案。

注意：我知道这不是最好的解决方案，但目前没有其他选择，所以我这样更改了代码：

override func viewDidLoad() {
    super.viewDidLoad()

    self.perform(#selector(handleDelay), with: nil, afterDelay: 3.0)

}

@objc fileprivate func handleDelay() {

    self.view.subviews.forEach {$0.removeFromSuperview()}

    if let view = self.view as! SKView? {
        // Load the SKScene from 'GameScene.swift' and should set it's size
        let scene = SecondGameScene(size: self.view.frame.size)
        // Set the scale mode to scale to fit the window
        scene.scaleMode = .aspectFill

        // Present the scene
        view.presentScene(scene)

        view.ignoresSiblingOrder = true

        view.showsFPS = false
        view.showsNodeCount = false
    }

}

更新： 最后我找到了从 SKScene 和 UIView Controller 迁移的正确方法，反之亦然。

例如（从 SKScene 移动到 UIViewController）：

fileprivate func moveToUIViewController(storyBoardId: String) {
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let vc = storyboard.instantiateViewController(withIdentifier: storyBoardId)
    vc.view.frame = self.frame
    vc.view.layoutIfNeeded()        

    self.view?.window?.rootViewController?.present(vc, animated: true, completion: nil)
}

（从 UIViewController 移动到 SKScene）：

fileprivate func returnToSKScene() {

    for element in self.view.subviews {
        element.removeFromSuperview()
    }
    self.dismiss(animated: true) {
        if let view = self.view as! SKView? {
            // Load the SKScene
            var scene: SKScene
            scene = AboutScene(size: sceneSize)

            // Set the scale mode
            scene.scaleMode = .aspectFill
            let transition = SKTransition.moveIn(with: .up, duration: 0.2)

            // Present the scene
            view.presentScene(scene, transition: transition)

            view.ignoresSiblingOrder = true
            view.showsFPS = false
            view.showsNodeCount = false
            view.showsPhysics = false

        }
    }
}

别忘了用“SKView”改变 UIViewController view 类：

1. 从 Storyboard -> 身份检查器 -> 自定义类中选择视图。

2. 2.从类下拉列表中选择SKView。

Answer 2

轻松修复。我将代码复制并粘贴到一个测试项目中，我发现你做错了什么。您没有引用要呈现的场景。您没有传入要呈现的特定 SKView 。您正在展示一个通用的 SKView 类。

这段代码：

override func viewDidLoad() {
    super.viewDidLoad()
    // Wait for three sec. then move to game scene
    self.perform(#selector(handleDelay), with: nil, afterDelay: 3.0)
}

@objc fileprivate func handleDelay() {

    view.layoutIfNeeded()

    if let view = self.view as! SKView? {
        // Load the SKScene
        let scene = GameScene(size: sceneSize)

        // Set the scale mode
        scene.scaleMode = .aspectFill
        scene.delegate = self
        // Present the scene
        view.presentScene(scene)

        view.ignoresSiblingOrder = true
        view.showsFPS = false
        view.showsNodeCount = false
        view.showsPhysics = false
    }
}

应该是这样的：

override func viewDidLoad() {
    super.viewDidLoad()
    // Wait for three sec. then move to game scene
    self.perform(#selector(handleDelay), with: nil, afterDelay: 3.0)
}

@objc fileprivate func handleDelay() {

    view.layoutIfNeeded()

    // Load the view as an SKView to prepare for an SKScene
    if let view = self.view as! SKView? {
        // Load the SKScene from the GameScene file
        let scene = GameScene()
        // Set the scale mode to scale to fit the window
        scene.scaleMode = .aspectFill

        // Present the scene
        view.presentScene(scene)

        view.ignoresSiblingOrder = true

        view.showsFPS = true
        view.showsNodeCount = true
    }
}

经过测试并且可以正常工作。