iOS Switch between 2 Navigation controller

Question

In my app, if the user isn't logged, it shows a login controller which is embedded in a navigation controller. When the user is logged, the app should switch to the other navigation controller to display the app.

How can I switch from one navigation controller to another one when the user is logged. ?

Thanks

I'm checking if the user is log in app delegate :

 // Check if user is log
    let currentUser = PFUser.currentUser()
    if currentUser != nil {
        // Do stuff with the user
    } else {
        // Show the signup or login screen
        let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let nav = mainStoryboardIpad.instantiateViewControllerWithIdentifier("LogInController") as! UINavigationController
        self.window?.rootViewController = nav
    }

SOLUTION : looks like it works
When user press logIn button :

let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let nav = mainStoryboardIpad.instantiateViewControllerWithIdentifier("MainNavController") as! UINavigationController
    let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
    appDelegate.window?.rootViewController = nav

where do u decide if user is logged in or not ? App delegate ? view did load ? — Teja Nandamuri
– Teja Nandamuri, Commented Nov 11, 2015 at 22:58
you can change to other navigation controller too, use storyboard ID !!! — Teja Nandamuri
– Teja Nandamuri, Commented Nov 11, 2015 at 23:11
when user is log by pressing the log button, I can't make self.window.rootViewController because i'm not in the app delegate now but in the logInViewController — user3722523
– user3722523, Commented Nov 11, 2015 at 23:13
u can use the app delegate any where in your view controllers. Just the pass the reference of app delegate to your view controller!!!! — Teja Nandamuri
– Teja Nandamuri, Commented Nov 11, 2015 at 23:14

Community · Accepted Answer · 2020-06-20 09:12:55Z

7

Solution 1

One solution would be to use just a single navigation controller. When the user logs in, you would pop all the view controllers used for logging in and push main view controller on the stack.

Solution 2

Alternatively, you could present a new navigation controller modally on top of the login stuff, with main controller as its root. It would be simply presented on top of it.

Solution 3

You can also consider creating the navigation controller with main view controller first and presenting the login navigation controller on top of it. Then, when user logs in you would just dismiss the login navigation controller revealing the main view controller.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Nov 11, 2015 at 22:56

Rafał Sroka

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1 Comment

Crashalot Over a year ago

Wouldn't solution 1 involve a glitch after you pop the login VCs and before pushing the main VC? We have a similar problem but with the added twist of the second nav controller (i.e., flow) needing a different orientation from the first nav controller.

Amorn Narula · Accepted Answer · 2015-11-12 04:57:02Z

4

Set your navigation controller storyboard ID

    let navigationController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("SecondNavigationController")
    self.presentViewController(navigationController, animated: true, completion: nil)

Hope this helps. :)

answered Nov 12, 2015 at 4:57

Amorn Narula

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2 Comments

user3722523 Over a year ago

then how u dismiss it ?

Amorn Narula Over a year ago

U mean when u want to log out ? Btw u can also use nsuserdefaults to check login

zef_s · Accepted Answer · 2024-08-19 22:19:54Z

It's not the best approach, but it works.✅

AppDelegate:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    AppRouter.shared.setAppFlow(.onboarding, animated: false)
    return true
}

Manager:

self.window.rootViewController = Your type of UINavigationController

class AppRouter {

enum FlowType {
    case onboarding
    case app
}

static let shared = AppRouter()

var window: UIWindow = UIWindow(frame: UIScreen.main.bounds)

func setAppFlow(_ type: FlowType, animated: Bool) {
    
    self.withTransition(animated)
    
    switch type {
    case .onboarding:
        self.window.rootViewController = UINavigationController(rootViewController: TestViewController())
    case .app:
        self.window.rootViewController = UINavigationController(rootViewController: MainTableViewController())
    }
    self.window.makeKeyAndVisible()
}

private func withTransition(_ bool: Bool) {
    guard bool else { return }
    let transition = CATransition()
    transition.duration = 0.3
    transition.timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
    transition.type = .push
    transition.subtype = .fromRight
    transition.fillMode = .both
    self.window.layer.add(transition, forKey: kCATransition)
}
}

Use for change:

@objc func myButtonAction() {
    AppRouter.shared.setAppFlow(.app, animated: true)
}

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