Xcode: Store Username and Password

Question

I have a login view controller that users need to type username and password in order to see the homepage. Now the users must type in the username and password every single time, which isn't convenient. I need to have a check box for "remember username" and "remember password" so that users can choose wether or not they would like to have their username of password stored the next time they login.

Any good way to do that? Or do I have to use Keychain, which according to many people is the best way?

My code is as follows:

import UIKit

import Firebase

class LoginViewController: UIViewController {

    var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        imageView = UIImageView(frame: view.bounds)
        imageView.contentMode = .scaleAspectFill
        imageView.clipsToBounds = true
        imageView.image = #imageLiteral(resourceName: "background")
        imageView.center = view.center
        view.addSubview(imageView)
        self.view.sendSubview(toBack: imageView)
        activityIndicator.hidesWhenStopped = true

    }

    //Outlets
    @IBOutlet weak var emailTextField: UITextField!
    @IBOutlet weak var passwordTextField: UITextField!


    //Login Action
    @IBOutlet weak var activityIndicator: UIActivityIndicatorView!

    @IBAction func loginAction(_ sender: AnyObject) {
        self.activityIndicator.startAnimating()

        if self.emailTextField.text == "" || self.passwordTextField.text == "" {

            //Alert to tell the user that there was an error because they didn't fill anything in the textfields because they didn't fill anything in

            let alertController = UIAlertController(title: "Error", message: "Please enter an email and password.", preferredStyle: .alert)

            let defaultAction = UIAlertAction(title: "OK", style: .cancel, handler: nil)
            alertController.addAction(defaultAction)

            self.present(alertController, animated: true, completion: nil)

            self.activityIndicator.stopAnimating()

        } else {

            Auth.auth().signIn(withEmail: self.emailTextField.text!, password: self.passwordTextField.text!) { (user, error) in

                if error == nil {

                    //Print into the console if successfully logged in
                    print("You have successfully logged in")

                    //Go to the HomeViewController if the login is sucessful
                    let vc = self.storyboard?.instantiateViewController(withIdentifier: "Home")
                    self.present(vc!, animated: true, completion: nil)

                    self.activityIndicator.stopAnimating()

                } else {

                    //Tells the user that there is an error and then gets firebase to tell them the error
                    let alertController = UIAlertController(title: "Error", message: error?.localizedDescription, preferredStyle: .alert)

                    let defaultAction = UIAlertAction(title: "OK", style: .cancel, handler: nil)
                    alertController.addAction(defaultAction)

                    self.present(alertController, animated: true, completion: nil)

                    self.activityIndicator.stopAnimating()
                }
            }
        }

    }
}

try using Keychain its a safer way, refer https://medium.com/ios-os-x-development/securing-user-data-with-keychain-for-ios-e720e0f9a8e2 — jerfin, Jul 18 '17 at 10:07

score 4 · Accepted Answer · edited Jul 18 '17 at 10:55

4

Below are some ways in which you can stored your credential:

NSUserDefault
plist
KeyChain Store
Local Database (SQLite)
CoreData

From above all, NSUserDefault and Keychain are best and easy way to use.

NSUserDefault:

For Storing into Default:

UserDefaults.standard.set(true, forKey: "Key") //Bool
UserDefaults.standard.set(1, forKey: "Key")  //Integer
UserDefaults.standard.set("TEST", forKey: "Key") //setObject

Getting from Defaults:

 UserDefaults.standard.bool(forKey: "Key")
 UserDefaults.standard.integer(forKey: "Key")
 UserDefaults.standard.string(forKey: "Key")

KeyChain: . Checkout this demo for keychain.

edited Jul 18 '17 at 10:55

g00glen00b

41,995
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answered Jul 18 '17 at 10:18

Nirmalsinh Rathod

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1

Best answer is this one, multiple options. – Pedro Pinho Jul 18 '17 at 10:28
As for the NSUserDafault, how do you implement the codes into my code? Especially in my case where checkbox is needed for UI. – Andrew Qin Jul 18 '17 at 11:00
When you get success in api response, you need to store email address and password into defualt.: UserDefaults.standard.set(txtEmail.text, forKey: "email_address"). – Nirmalsinh Rathod Jul 18 '17 at 11:01

score 1 · Answer 2 · answered Jul 18 '17 at 10:17

1

You can use any one of the below approach -

NSUserDefaults
KeychainWrapper
NSURLCredential

Reference URL iOS: How to store username/password within an app?

answered Jul 18 '17 at 10:17

Annie Gupta

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score 1 · Answer 3 · answered Jul 18 '17 at 10:25

1

Keychain is the most secure place to store the raw password.It means better than any other places.

You can use KeychainWrapper which is providing from Apple’s Keychain Services Programming Guide.

answered Jul 18 '17 at 10:25

Dharma

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Xcode: Store Username and Password

3 Answers3