How to load all view controllers storyboard, but skip the natural sequence and go direct to a specific view?

问题

Suppose I have three view controllers inside a storyboard, I want to load all of them into view controllers stack, but I want to choose which one will appear first to the user. As shown below I would like to show the third view on load, instead to show the first, any glue?

回答1:

Option 1. Using storyboards, you see the arrow pointing to your ViewController 1. Drag that to View Controller 2 or 3.

Option 2. On load of your first view controller, you can instantiate whichever view you'd like in your viewDidLoad(), provided you have given each storyboard view an ID.

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewController(withIdentifier: "YourVCIdentifier")
self.present(controller, animated: true, completion: nil)

Option 3. In your AppDelegate file, you can do this.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    self.window = UIWindow(frame: UIScreen.main.bounds)

    let storyboard = UIStoryboard(name: "Main", bundle: nil)

    let initialViewController = storyboard.instantiateViewController(withIdentifier: "YourVCIdentifier")

    self.window?.rootViewController = initialViewController
    self.window?.makeKeyAndVisible()

    return true
}

来源：https://stackoverflow.com/questions/43795139/how-to-load-all-view-controllers-storyboard-but-skip-the-natural-sequence-and-g