下面是我的代码，如果不使用嵌入式导航控制器，就无法通过此建议加载第一个视图控制器。
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
let storyBoard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
let firstViewController = storyBoard.instantiateViewControllerWithIdentifier("LoginViewController")
self.window?.rootViewController = firstViewController
return true
}
1）确保为情节提要板输入正确的名称。2）检查您的视图控制器的标识符名称。
然后，
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let initialViewController = storyboard.instantiateViewControllerWithIdentifier("LoginViewController") as UIViewController
self.window?.rootViewController = initialViewController
self.window?.makeKeyAndVisible()
return true
}
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