How to show Tab Bar Controller? - swift

Question

I've tried everything to get a tabbar controller onto MainViewController and nothing seems to work.
Just a quick rundown on how app works:
Storyboard entry is AppContainerViewController and if user is logged in then MainViewController appears as it should however I can't get MainVC to become a TabBar controller to display tab bar for user navigation to various pages.
What am I doing wrong?!
appcontainerviewcontroller
class AppContainerViewController: UIViewController {
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
AppManager.shared.appContainer = self
AppManager.shared.showApp()
}
}
import UIKit
import Firebase
import FirebaseDatabase
import FBSDKLoginKit
class AppManager {
static let shared = AppManager()
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var appContainer: AppContainerViewController!
private init() {}
func showApp() {
var viewController: UIViewController
if (Auth.auth().currentUser == nil) && (FBSDKAccessToken.current() == nil) {
viewController = storyboard.instantiateViewController(withIdentifier: "LoginViewController")
} else {
viewController = storyboard.instantiateViewController(withIdentifier: "MainViewController")
}
appContainer.present(viewController, animated: true, completion: nil)
}
func logout() {
let loginManager = FBSDKLoginManager()
loginManager.logOut()
try! Auth.auth().signOut()
appContainer.presentedViewController?.dismiss(animated: true, completion: nil)
}
}
main view controller
import UIKit
import Firebase
import FirebaseDatabase
import FBSDKShareKit
class MainViewController: UIViewController {
#IBOutlet weak var name: UILabel!
#IBOutlet weak var email: UILabel!
#IBAction func logoutPressed(_ sender: Any) {
AppManager.shared.logout()
}
#IBAction func fbSharePressed(_ sender: Any) {
let content = FBSDKShareLinkContent()
content.contentURL = URL(string: "https://advice.com")
content.quote = "Hey, I'm one step closer to getting into the college of my dreams with this app. Download it and let's go together!"
let dialog : FBSDKShareDialog = FBSDKShareDialog()
dialog.fromViewController = self
dialog.shareContent = content
dialog.mode = FBSDKShareDialogMode.automatic
dialog.show()
}
func userProfile() {
guard let uid = Auth.auth().currentUser?.uid else { return }
let ref = Database.database().reference()
ref.child("users").child(uid).observeSingleEvent(of: .value, with: { (snapshot) in
guard let dict = snapshot.value as? [String: Any] else { return }
let user = CurrentUserProfile(uid: uid, dictionary: dict)
self.name.text = user.name
self.email.text = user.email
}, withCancel: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
userProfile()
}
}

Answer 1

Egg on my face. My storyboard IDs were wrong and Embedding MainViewController into a TabBarController via the storyboard and then applying MainVC's storyboard ID to the TabBarController did the trick.