ios - App Delegate 中用于加载 Storyboard的 Swift 代码导致崩溃

Question

我有一个正在编写的通用应用程序，我最初使用两个 Storyboard文件编写它。我在 App Delegate didFinishLaunchingWithOptions 例程中有代码来决定要加载哪个 Storyboard 并离开它。从那以后我意识到这是一件愚蠢的事情，因为我有重复的代码，所以我删除了一个 Storyboard并使另一个通用。我已经修复了 VC 以指向正确的类和所有内容。但是，我的应用程序现在拒绝启动。当我在 sim 中运行它时，它给了我错误

The app delegate must implement the window property if it wants to use a main storyboard file.

.

这是我在 App Delegate 中的代码:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.

    var deviceIdiom = UIDevice.currentDevice().userInterfaceIdiom
    if deviceIdiom == UIUserInterfaceIdiom.Phone {
        strDevice = "iPhone"
    } else if deviceIdiom == UIUserInterfaceIdiom.Pad {
        strDevice = "iPad"
    } else {
        strDevice = "Unknown"
    }

    return true
}

我做错了什么？

(我已经看过但没有帮助的问题): Unique Issue displaying first storyboard scene in Xcode
The app delegate must implement the window property if it wants to use a main storyboard file
Managing two storyboards in App Delegate
How to manually set which storyboard view to show in app delegate
Swift - Load storyboard programatically

Answer 1

您的应用委托(delegate)需要像这样开始:

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

  var window: UIWindow?

  //...
}