Error: Argument passed to call that takes no arguments - ios

Question

I'm creating a simple login signup app. But I'm getting an error, and I don't know how to fix it, please help! Here's my code:
//
// ViewController.swift
// CHLogbook-Application
//
// Created by Timothy Dillan on 06/01/18.
// Copyright © 2018 TPINC. All rights reserved.
//
import UIKit
import FirebaseAuth
import Firebase
class ViewController: UIViewController {
#IBOutlet weak var emailTextField: UITextField!
#IBOutlet weak var passwordTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func createAccountTapped(_ sender: Any) {
if let email = emailTextField.text, let password = passwordTextField.text {
Auth.auth().createUser(withEmail: email, password: password, completion: { user, error in
if let firebaseError = error {
print(firebaseError.localizedDescription)
return
}
self.presentLoggedInScreen()
})
}
}
#IBAction func loginTapped(_ sender: Any) {
if let email = emailTextField.text, let password = passwordTextField.text {
Auth.auth().signIn(withEmail: email, password: password, completion: { (user, error) in
if let firebaseError = error {
print(firebaseError.localizedDescription)
return
}
self.presentLoggedInScreen()
})
}
}
func presentLoggedInScreen() {
let storyboard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let loggedInVC:LoggedInVC = storyboard.instantiateInitialViewController(withIdentifier:"LoggedInVC") as! LoggedInVC
self.present(loggedInVC, animated: true, completion: nil)
}
}
The error is in this line in the withIdentifier part, which, when I wanted to run it, always says "Argument passed to call that takes no arguments":
let loggedInVC:LoggedInVC = storyboard.instantiateInitialViewController(withIdentifier:"LoggedInVC") as! LoggedInVC

Answer 1

instantiateInitialViewController takes no arguments, it simply initializes the first view controller of the storyboard. You are looking for instantiateViewController.
let loggedInVC = storyboard.instantiateViewController(withIdentifier:"LoggedInVC") as! LoggedInVC

Answer 2

Do not use this Code
func presentLoggedInScreen() {
let storyboard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let loggedInVC:LoggedInVC = storyboard.instantiateInitialViewController(withIdentifier:"LoggedInVC") as! LoggedInVC
self.present(loggedInVC, animated: true, completion: nil)
}
Look Up first line. You instantiate new Main.Storyboard which takes memory. Use storyboard which already in memory.
func presentLoggedInScreen() {
let loggedInVC = storyboard?.instantiateInitialViewController(withIdentifier:"LoggedInVC") as! LoggedInVC
self.present(loggedInVC, animated: true, completion: nil)
}