ios - 尝试使用 Storyboard ID 从 GameScene 移动到 ViewController 时发生 fatal error

Question

从主菜单 View (UIViewController) 到游戏玩法 (GameViewController.swift - UIViewController)，我使用了以下代码，取得了巨大成功。 p>

我还测试了主菜单 View 到游戏结束 View (UIViewController)，以确保游戏结束 View 全部正确连接并且工作正常，但是我尝试从 GameScene.swift (SKScene) 调用一个函数到 GameViewController.swift，以在游戏结束时切换 View (游戏结束 View )。

但是我收到 fatal error :在解包可选值时意外发现 nil

为什么我会在尝试通过 GameViewController.swift 移出 GameScene.swift 时收到此错误，但不会从任何其他 UIViewController(如主菜单或游戏结束)中收到此错误？

func goToGameOver() {
        print("Fetched: goToGameOver()")
        let gameOverController = self.storyboard?.instantiateViewControllerWithIdentifier("GameOverController") as? GameOverController
        gameOverController!.missionMode = missionMode
        gameOverController!.missionLevel = missionLevel
        self.navigationController?.pushViewController(gameOverController!, animated: true)
    }

如果您需要更多信息来帮助，请告诉我。

感谢大家的帮助!

<小时/>

更新代码

我的 Storyboard被命名为Main.storyboard

我已经通过基于代码和下面的答案进行了更新，正如您在评论中看到的那样，我不再收到任何错误，但我也没有看到 View 从 GameScene 到 GameOverController View 的更改/切换.

func goToGameOver() {
        print("Fetched: goToGameOver()")
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let gameOverController = storyboard.instantiateViewControllerWithIdentifier("GameOverController") as? GameOverController
        gameOverController!.missionMode = missionMode
        gameOverController!.missionLevel = missionLevel
        self.navigationController?.pushViewController(gameOverController!, animated: true)
    }

<小时/>

更新以显示 Storyboard设置。

是否会因为我的游戏场景 Controller (UIViewControllers) 进入 SKScene 而导致导航 Controller 损坏而没有响应？奇怪的是我没有收到任何错误......

左上角:导航 Controller

顶部中心:主手动 Controller

右上角:游戏场景 Controller

底部中心:游戏结束 Controller

<小时/>

更新提供 GameViewController.swift

这是我的游戏 View Controller ，我没有分配导航 Controller ，因为我似乎不需要在主菜单 Controller 或游戏结束 Controller 中执行此操作。我怎样才能在swift中分配navigationController？

import UIKit
import SpriteKit
import iAd

class GameViewController: UIViewController, ADBannerViewDelegate {

    var iAdBanner = ADBannerView()
    var bannerVisible = false

    var missionMode: Bool!
    var missionLevel: Int!

    override func viewDidLoad() {
        super.viewDidLoad()

        if let scene = GameScene(fileNamed:"GameScene") {
            // Configure the view.
            let skView = self.view as! SKView
            skView.showsFPS = true
            scene.size = skView.bounds.size
            skView.showsNodeCount = true

            /* Sprite Kit applies additional optimizations to improve rendering performance */
            skView.ignoresSiblingOrder = true

            /* Set the scale mode to scale to fit the window */
            scene.scaleMode = .AspectFill

            scene.missionMode = missionMode
            scene.missionLevel = missionLevel

            skView.presentScene(scene)
        }
    }

    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)

        iAdBanner.frame = CGRectMake(0, -iAdBanner.frame.height, self.view.frame.width, 0)
        iAdBanner.delegate = self
        bannerVisible = false
    }

    func bannerViewDidLoadAd(banner: ADBannerView!) {
        if(bannerVisible == false) {

            // Add banner Ad to the view
            if(iAdBanner.superview == nil) {
                self.view.addSubview(iAdBanner)
            }

            // Move banner into visible screen frame:
            UIView.beginAnimations("iAdBannerShow", context: nil)
            banner.frame = CGRectOffset(banner.frame, 0, banner.frame.size.height)
            banner.alpha = 1
            UIView.commitAnimations()
            bannerVisible = true
        }

    }

    func bannerView(banner: ADBannerView!, didFailToReceiveAdWithError error: NSError!) {
        if(bannerVisible == true) {
            // Move banner below screen frame:
            UIView.beginAnimations("iAdBannerHide", context: nil)
            banner.frame = CGRectOffset(banner.frame, 0, -banner.frame.size.height)
            banner.alpha = 0
            UIView.commitAnimations()
            bannerVisible = false
        }

    }

    func goToGameOver() {
        print("Fetched: goToGameOver()")
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        print(storyboard)
        let gameOverController = storyboard.instantiateViewControllerWithIdentifier("GameOverController") as! GameOverController
        gameOverController.missionMode = missionMode
        gameOverController.missionLevel = missionLevel
        print(gameOverController)
        self.navigationController?.pushViewController(gameOverController, animated: true)
    }

    override func shouldAutorotate() -> Bool {
        return true
    }

    override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
        if UIDevice.currentDevice().userInterfaceIdiom == .Phone {
            return .AllButUpsideDown
        } else {
            return .All
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Release any cached data, images, etc that aren't in use.
    }

    override func prefersStatusBarHidden() -> Bool {
        return true
    }
}

Answer 1

我不知道你的 Storyboard是如何初始化的，但你可以在你的项目中指定你的 Storyboard

func goToGameOver() {
        print("Fetched: goToGameOver()")
        let storyboard = UIStoryboard(name: "YourStoryBoardName", bundle: nil)
        let gameOverController = storyboard.instantiateViewControllerWithIdentifier("GameOverController") as? GameOverController
        gameOverController!.missionMode = missionMode
        gameOverController!.missionLevel = missionLevel
        self.navigationController?.pushViewController(gameOverController!, animated: true)
    }

应该可以