Facebook Login not working after renaming VIew Controller

Question

I am following this tutorial on how to rename a Swift controller. My controller was previously named FirestViewController. It is now named LoginViewController.

I know the rename worked because the project builds and runs correctly in the virtual environment. However the ViewDidLoad function that holds my Facebook Login code does not work. I am using the Swift Cocoapods SDK.

Any ideas as to why the app runs but the Facebook Login button is missing would be greatly appreciated.

EDIT: Here is my new LoginViewController code file:

import UIKit
import FacebookCore
import FBSDKCoreKit
import FBSDKLoginKit
import FacebookLogin

class LoginViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        //let loginButton = FBSDKLoginButton
        let loginButton = FBSDKLoginButton()
        loginButton.center = view.center
        view.addSubview(loginButton)
    }

    func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError! ) {
        /*
            Check for successful login and act accordingly.
            Perform your segue to another UIViewController here.
         */
        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
        let nextViewController = storyBoard.instantiateViewController(withIdentifier: "nextView") as! SecondViewController
        self.present(nextViewController, animated:true, completion:nil)
    }

    func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) {
        // Actions for when the user logged out goes here
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

EDIT 2: New code after suggested changes:

import UIKit
import FacebookCore
import FBSDKCoreKit
import FBSDKLoginKit
import FacebookLogin

class LoginViewController: UIViewController, FBSDKLoginButtonDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        let loginButton = FBSDKLoginButton()
        loginButton.delegate = self
        loginButton.center = view.center
        view.addSubview(loginButton)
    }

    func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error! ) {
        /*
            Check for successful login and act accordingly.
            Perform your segue to another UIViewController here.
         */
        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
        let nextViewController = storyBoard.instantiateViewController(withIdentifier: "nextView") as! SecondViewController
        self.present(nextViewController, animated:true, completion:nil)
    }

    func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) {
        // Actions for when the user logged out goes here
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

Answer 1

I fixed the issue thanks to the pointers by Kevin Vaughan. After adding break points to my code, I noticed it was never breaking at these points suggesting the code was not being executed.

I had to update the absolute path to the view controller for the storyboard to finally read the code.