How to use FirebaseUI for Google authentication on iOS in Swift?

Question

I\'m following https://firebase.google.com/docs/auth/ and want to use FirebaseUI (https://github.com/firebase/FirebaseUI-iOS/tree/master/FirebaseUI) for authentication.

Answer 1

Is your AppDelegate a FIRAuthUIDelegate?

Anyway, instead of using delegates, you can make use of FIRAuth listener: func addAuthStateDidChangeListener(listener: FIRAuthStateDidChangeListenerBlock) -> FIRAuthStateDidChangeListenerHandle

You can use it this way:

FIRAuth.auth()?.addAuthStateDidChangeListener {

    (auth, user) in

    if user != nil {

        print("user signed in")

    }

}

You can see a working sample on https://github.com/cooliopas/FirebaseAuth-Demo

Its in spanish, but I'm sure you will understand the code.