displaying user email on viewcontroller gives optional"email adress" [duplicate] - swift

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So I'm using firebase Authentication in my ios app, and I want to display the email address, and Username in UIlabels on a viewcontroller. But when i display the value of Auth.auth().email on a UIlabel, the Label would show Optional"email adress".How do i get rid of the Optional and also how to allow the user to have a display name in firebase Authentication?
import Firebase
import FirebaseAuth
class ProfileViewController: UIViewController {
#IBOutlet weak var profiepic: UIImageView!
#IBOutlet weak var UsernameLabel: UILabel!
#IBOutlet weak var EmailLabel: UILabel!
#IBOutlet weak var league: UILabel!
#IBOutlet weak var Achievements: UIButton!
#IBOutlet weak var resetpasswd: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
UsernameLabel.layer.borderColor = UIColor.black.cgColor
EmailLabel.layer.borderColor = UIColor.black.cgColor
league.layer.borderColor = UIColor.black.cgColor
Achievements.layer.cornerRadius = 55/2
resetpasswd.layer.cornerRadius = 55/2
resetpasswd.layer.borderColor = UIColor.black.cgColor
displayinfo()
}
func displayinfo() {
let user = Auth.auth().currentUser
if let user = user {
// The user's ID, unique to the Firebase project.
// Do NOT use this value to authenticate with your backend server,
// if you have one. Use getTokenWithCompletion:completion: instead.
let email = user.email
let photoURL = user.photoURL
EmailLabel.text = "Email: \(email)"
// ...
}
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destination.
// Pass the selected object to the new view controller.
}
*/
}

Answer 1

You need to use if or guard to display string info properly.
Using if:
func displayinfo() {
let user = Auth.auth().currentUser
if let user = user {
if let email = user.email {
EmailLabel.text = "Email: \(email)"
}
if let photoURL = user.photoURL {
...
}
// ...
}
}
Using guard:
func displayinfo() {
guard let user = Auth.auth().currentUser else {
print("No user info found")
return
}
if let email = user.email {
EmailLabel.text = "Email: \(email)"
//EmailLabel.text = "Email: " + email
}
if let photoURL = user.photoURL {
...
}
// ...
}
Let me know if you have any issue in these solutions.
Apart from this, I would rather write UIViewController in this manner which seems to be a more clearer approach.
class ProfileViewController: UIViewController {
#IBOutlet weak var profiepic: UIImageView!
#IBOutlet weak var lblUsername: UILabel! {
didSet {
lblUsername.layer.borderColor = UIColor.black.cgColor
}
}
#IBOutlet weak var lblEmail: UILabel! {
didSet {
lblEmail.layer.borderColor = UIColor.black.cgColor
}
}
#IBOutlet weak var lblLeague: UILabel! {
didSet {
lblLeague.layer.borderColor = UIColor.black.cgColor
}
}
#IBOutlet weak var btnAchievements: UIButton! {
didSet {
btnAchievements.layer.cornerRadius = 55/2
// For button height, instead of 55 here you can use, btnAchievements.bounds.height / 2 or use constrain also to change button height when bound changes
}
}
#IBOutlet weak var btnReset: UIButton! {
didSet {
btnReset.layer.cornerRadius = 55/2
btnReset.layer.borderColor = UIColor.black.cgColor
}
}
private var currentUser: AuthUser? {// Type of Auth.auth().currentUser
didSet {
// Use above code for displayInfo or simply call displayInfo from here
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.currentUser = Auth.auth().currentUser
}
...
}
I hope this would help you designing other UIViewControllers as well.