How to Navigate another page when application launch first time in swift 3

Question

I am implementing an iOS app. when User Launch the application first time, I need to navigate to another page and from next time onwards I need to navigate Home Page. How to do this task in iOS swift?

Save bool value in UserDefault for first time or not. then write logic(if..else) in appDelegate, navigate to depended VC — Jay Patel, Apr 27 '18 at 08:00

score 1 · Answer 1 · answered Mar 19 '20 at 08:43

Updated: if you get this error: "Value of type 'AppDelegate' has no member 'window' ".

Answer is : you have to write your codes inside of SceneDelegate.swift

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {

    let defaults = UserDefaults.standard


    guard  let a=UserDefaults.standard.object(forKey: "wantOverview")  else {



        let storyBoard = UIStoryboard.init(name: "Main", bundle: nil)
          let initialVc = storyBoard.instantiateViewController(withIdentifier: "firstTimeViewController") as! firstTimeViewController
          self.window?.rootViewController = initialVc
          self.window?.makeKeyAndVisible()


          defaults.set(false, forKey: "wantOverview")
        return
      }


      let storyBoard = UIStoryboard.init(name: "Main", bundle: nil)
            let initialVc = storyBoard.instantiateViewController(withIdentifier: "ViewController") as! ViewController
            self.window?.rootViewController = initialVc
            self.window?.makeKeyAndVisible()

    guard let _ = (scene as? UIWindowScene) else { return }
}

Sharad Chauhan · Answer 2 · 2018-04-27T08:10:01.620

This can be achieved using userdefaults. Just make a new controller like SplashViewController which will only redirect to desired ViewController.

import UIKit

class SplashViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        decideWhichScreenToShow()
    }

    // This logic will do
    func decideWhichScreenToShow(){
        if !UserDefaults.standard.bool(forKey: "your_key"){
            // This will execute first time, in that controller's viewDidLoad() make this true
        }else{

        }
    }
}

You can write same logic in Appdelegate.

You should remove the irrelevant method to be clearer : `didReceiveMemoryWarning()` `preferredStatusBarStyle` `prefersHomeIndicatorAutoHidden()` — Acrasia, Apr 27 '18 at 08:09

score 0 · Answer 3 · answered Apr 27 '18 at 08:17

Create func for checking that if your key in UserDefaults or not using this link & Then check by if...else

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    window = UIWindow(frame: UIScreen.main.bounds)
    window?.makeKeyAndVisible()

    if isKeyPresentInUserDefaults(key: "isFirstTime") {
        let home = HomeVC()
        window?.rootViewController = home
    } else {
        let login = LoginVC()
        window?.rootViewController = login
        UserDefaults.standard.set(true, forKey: "isFirstTime")
    }

    return true
}

func isKeyPresentInUserDefaults(key: String) -> Bool {
    return UserDefaults.standard.object(forKey: key) != nil
}

score 0 · Answer 4 · edited Apr 30 '18 at 13:57

You may use change the didFinishLaunchingWithOptions method in AppDelegate to achieve this.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    self.window = UIWindow(frame: UIScreen.main.bounds)
    guard let firstTime = UserDefaults.standard.object(forKey: "IsFirstTime")  else {
        UserDefaults.standard.set(true, forKey: "IsFirstTime")
        let storyBoard = UIStoryboard.init(name: "FirstStoryBoard", bundle: nil)
        let initialVc = storyBoard.instantiateViewController(withIdentifier: "FirstControllerId") as! FirstTimeViewController
        self.window?.rootViewController = initialVc
        self.window?.makeKeyAndVisible()
        return true
    }
    let storyBoard = UIStoryboard.init(name: "Main", bundle: nil)
    let initialVc = storyBoard.instantiateViewController(withIdentifier: "NormalInitialController") as! ViewController
    self.window?.rootViewController = initialVc
    self.window?.makeKeyAndVisible()
    return true

}

You check if the value for key, "IsFirstTime", exists in UserDefaults. There won't be a value if the app is launching for the first time. In this case, you can launch your FirstTimeViewController and set a value to the key in UserDefaults.

If a value exists in UserDefaults, just initiate your normal ViewController.

score 0 · Answer 5 · answered Apr 27 '18 at 14:32

Try this:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {


    if firstTime = UserDefaults.standard.object(forKey: "firstTime")
    {
        let storyboard = UIStoryboard(name: "SecondStoryBoard", bundle: nil)
        let MainView = storyboard.instantiateViewController(withIdentifier: "SecondTimeViewController") as! SecondTimeViewController

        let navController = UINavigationController.init(rootViewController: MainView)

        self.window?.rootViewController = navController

    }
    else
    {
        UserDefaults.standard.set(true, forKey: "firstTime")

        let storyboard = UIStoryboard(name: "FirstStoryBoard", bundle: nil)
        let MainView = storyboard.instantiateViewController(withIdentifier: "FirstTimeViewController") as! FirstTimeViewController

        let navController = UINavigationController.init(rootViewController: MainView)

        self.window?.rootViewController = navController

    }

}

score 0 · Accepted Answer · answered Apr 27 '18 at 17:28

The following solution to this common problem assumes that

At the outset — in this example, that's before the "username" key has been set in the user defaults — we want to launch to the storyboard's Initial View Controller (where the user is supposed to set the "username" key).
Thereafter, we always want to launch to a different view controller in the storyboard, whose identifier in this example is "root".

It's very short and simple!

class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        if let rvc = self.window?.rootViewController {
            if UserDefaults.standard.object(forKey:"username") as? String != nil {
                self.window!.rootViewController = rvc.storyboard!.instantiateViewControllerWithIdentifier("root")
            }
        }
        return true
    }
}

How to Navigate another page when application launch first time in swift 3

6 Answers6