如何在iOS的SpriteKit模板中重命名默认场景？

Question

我对Swift和iOS开发都非常陌生。

我一直在开发一个基于苹果SpriteKit（带有GameplayKit集成）模板的游戏。

一切都很顺利，直到我将GameScene.swift和GameScene.sks重命名为MapMainScene.swift和MapMainScene.sks。 我确保在GameViewController.swift中更改了以下代码：

override func viewDidLoad() {
    super.viewDidLoad()

    // Load 'GameScene.sks' as a GKScene. This provides gameplay related content
    // including entities and graphs.
    if let scene = GKScene(fileNamed: "GameScene") {

        // Get the SKScene from the loaded GKScene
        if let sceneNode = scene.rootNode as! GameScene? {

            // Copy gameplay related content over to the scene
            sceneNode.entities = scene.entities
            sceneNode.graphs = scene.graphs

            // Set the scale mode to scale to fit the window
            sceneNode.scaleMode = .aspectFill

            // Present the scene
            if let view = self.view as! SKView? {
                view.presentScene(sceneNode)

                view.ignoresSiblingOrder = true

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

to:

override func viewDidLoad() {
    super.viewDidLoad()

    // Load 'MainMapScene.sks' as a GKScene. This provides gameplay related content
    // including entities and graphs.
    if let scene = GKScene(fileNamed: "MainMapScene") {

        // Get the SKScene from the loaded GKScene
        if let sceneNode = scene.rootNode as! MainMapScene? {

            // Copy gameplay related content over to the scene
            sceneNode.entities = scene.entities
            sceneNode.graphs = scene.graphs

            // Set the scale mode to scale to fit the window
            sceneNode.scaleMode = .aspectFill

            // Present the scene
            if let view = self.view as! SKView? {
                view.presentScene(sceneNode)

                view.ignoresSiblingOrder = true

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

我还在Gamescene.swift中做了以下更改：

class GameScene: SKScene {
    // Some code
}

请在MainMapScene.swift中进行如下修改：

class MainMapScene: SKScene {
    // Some code
}

但是该应用在启动时崩溃了。控制台的输出显示：

2016-07-21 16:29:35.593592 MyGame[10656:1944648] [User Defaults] CFPrefsPlistSource<0x6080000e5e00> (Domain: kCFPreferencesAnyApplication, User: kCFPreferencesCurrentUser, ByHost: No, Container: (null)) is waiting for writes to complete so it can determine if new data is available
2016-07-21 16:29:35.603729 MyGame[10656:1944648] [FenceWorkspace] creating a CA fence port (5d13)
2016-07-21 16:29:35.638 MyGame[10656:1944648] *** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: '*** -[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of class (GameScene) for key (root); the class may be defined in source code or a library that is not linked'
*** First throw call stack:

看起来我的项目中仍然有一个对“GameScene”的引用，但我已经在整个项目中搜索了一遍，没有找到任何“GameScene”的内容。

我相信这是非常简单的问题。我需要在storyboard编辑器中更改outlet或其他内容吗？如果我尝试在新项目中更改“GameScene”的名称，就会出现此问题，所以我知道这不是特定于我的项目的问题。

- Garry Pettet

Answer 1

GameScene实际上在另一个地方被引用，而来自NSKeyedArchiver的错误应该提示您它在哪里：它被编码在您正在加载的.sks文件中。您可以在Xcode编辑器的“Custom Class”选项卡中找到它。

此设置告诉NSKeyedUnarchiver在加载.sks文件时应该使用哪个类来解码场景。这应该是对GameScene的最后一次引用，因此这将完成您的重命名！

- andyvn22

---

那是隐藏的地方。谢谢！ - Garry Pettet

你救了我一命！谢谢！ - Sungwook Kim