How to check if user has valid Auth Session Firebase iOS?

Question

I wanna check if the user has still a valid session, before I present the Home View controller of my app. I use the latest Firebase API. I think if I use the legacy, I\'ll be ab

Answer 1

Updated answer

Solution for latest Firebase SDK - DOCS

    // save a ref to the handler
    private var authListener: AuthStateDidChangeListenerHandle?

    // Check for auth status some where
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        authListener = Auth.auth().addStateDidChangeListener { (auth, user) in

            if let user = user {
                // User is signed in
                // let the user in?

                if user.isEmailVerified {
                    // Optional - check if the user verified their email too
                    // let the user in?
                }
            } else {
                // No user
            }
        }
    }

    // Remove the listener once it's no longer needed
    deinit {
        if let listener = authListener {
            Auth.auth().removeStateDidChangeListener(authListener)
        }
    }

Original solution

Solution in Swift 3

override func viewDidLoad() {
    super.viewDidLoad()

    FIRAuth.auth()!.addStateDidChangeListener() { auth, user in
        if user != nil {
            self.switchStoryboard()
        }
    }
}

Where switchStoryboard() is

func switchStoryboard() {
    let storyboard = UIStoryboard(name: "NameOfStoryboard", bundle: nil)
    let controller = storyboard.instantiateViewController(withIdentifier: "ViewControllerName") as UIViewController

    self.present(controller, animated: true, completion: nil)
}

Source