Setting Intialview controller embedded in UINavigationController - swift

Question

I have few view controllers embedded in UINavigationController. The first view controller is login page. The second view controller is the home page. I want initialview controller as second view controller when the user is already logged in.
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
{
// Override point for customization after application launch.
if let data = Locksmith.loadDataForUserAccount(userAccount: "someString")
{
if let userAccessToken = data["accessToken"]
{
if (userAccessToken as! String) != ""
{
let initialViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "HomePageViewController") as! HomePageViewController
loginResponse = LoginResponse()
loginResponse?.UserAccessToken = userAccessToken as? String
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.rootViewController = initialViewController
self.window?.makeKeyAndVisible()
}
}
}
return true
}
The problem is the subsequent view controllers are not embedded in navigation controller. Since it is not embedded in navigation controller I am not able to goback from one view controller to the other.

Answer 1

Add this in App delegate
first check user already login or not, if login then execute this code
let mainStoryBoard = UIStoryboard(name: "Main", bundle: nil)
let redViewController = mainStoryBoard.instantiateViewControllerWithIdentifier("respectiveIdentifier") as! ViewController
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
appDelegate.window?.rootViewController = redViewController

Answer 2

Use this in App Delegate and add an extension of UIStoryboard.
func checkForAlreadyLogin() {
let dashBoardScreen = UIStoryboard.dashBoardScreen()
let loginController = UIStoryboard.loginController()
if UserDefaults.standard.bool(forKey: UserDefaultValues().LOGINSTATUS){
self.window!.rootViewController = dashBoardScreen
}else {
self.window!.rootViewController = loginController
}
}
public extension UIStoryboard {
class func mainStoryboard() -> UIStoryboard { return UIStoryboard(name: "Main", bundle: Bundle.main) }
class func dashBoardScreen() -> HomeViewController?{
return mainStoryboard().instantiateViewController(withIdentifier: "HomeViewController") as? HomeViewController
}
internal class func loginController() -> LoginViewController?{
return mainStoryboard().instantiateViewController(withIdentifier: "LoginViewController") as? LoginViewController
}
}
Just call this checkForAlreadyLogin() method in 'didFinishLaunchingWithOptions'.
Also remember to set StoryboardID in the storyboard for each viewController.

Answer 3

This code did the trick for me.
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
if let data = Locksmith.loadDataForUserAccount(userAccount: "someString")
{
if let userAccessToken = data["accessToken"]
{
if (userAccessToken as! String) != ""
{
let initialViewController = UIStoryboard(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "HomePageViewController") as! HomePageViewController
let navigationController = self.window?.rootViewController as! UINavigationController
navigationController.pushViewController(initialViewController, animated: true)
}
}
}
return true
}