How do I use Firebase Authentication using multiple view controllers? - swift

Question

I am in the process of adding the Create new user Method for Firebase. I have already completed the SignUp Auth process. However when users are creating a new account. How do I go about this if I have multiple ViewControllers?
For example,
The First SignUpViewController - User is asked to enter their email address.
When the user clicks next. This is then followed by another ViewController.
SecondViewControlle - User is asked to enter their name and create a password.
After this, The user is greeted with a Welcome page with their name they submitted. (Welcome to “App Name” Name). Which will then proceed to the home UI after next is clicked.
How do I implement The Auth.auth().CreateUserwith func when I have more than one ViewController? Is there a way to save the email and password using two different ViewControllers?
Update**
I have added the following code that was suggested below, however the App crashes every time I click next on the enter your " Email" View Controller. I am getting this warning. Does anyone know what I did wrong? The rest of the code seems to be working fine. Here is a screenshot.

Answer 1

You can save all information in a Dictionary and use it at the time of SignUp. In your AppDelegate class:
/// Instance of AppDelegate
static let shared: AppDelegate = UIApplication.shared.delegate as! AppDelegate
/// Dictionary for user information
var userInformation: Dictionary<String, Any> = [:]
On Email Screen - Next Button Click
/// #1. Validate the email address
/// #2. Save it in Dictionary
AppDelegate.shared.userInformation["email"] = "xyz#gmail.com" or tFEmail.text.lowercased()
Then On name and password screen
AppDelegate.shared.userInformation["name"] = "xyz" or tFName.text
AppDelegate.shared.userInformation["password"] = "xxxxxxx" or tFPassword.text
Now on last screen - Sign Up Button clicked you can use all this information
let email = AppDelegate.shared.userInformation["email"]
let name = AppDelegate.shared.userInformation["name"]
let password = AppDelegate.shared.userInformation["password"]
Implement the Firebase SignUp method and after successfully logged in show the welcome screen.