英語ですが、こちらの動画のログイン機能を実装してみました。
現在のバージョンだと、色々と違って動かなかったので、動く様にコードを若干変更しています。
ユーザー登録画面
RegisterPageViewController.swift
import UIKit
class RegisterPageViewController: UIViewController {
@IBOutlet weak var userNameTextField: UITextField!
@IBOutlet weak var userPasswordTextField: UITextField!
@IBOutlet weak var repeatPasswordTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func registerButtonTapped(_ sender: Any) {
let userName = userNameTextField.text
let userPassword = userPasswordTextField.text
let userRepeatPassword = repeatPasswordTextField.text
// 空白確認
if(userName == "" || userPassword == "" || userRepeatPassword == ""){
//アラートメッセージ
displayMyAlertMessage(userMessage: "全てのフォームに入力してください。")
return
}
//パスワード一致確認
if(userPassword != userRepeatPassword)
{
displayMyAlertMessage(userMessage: "パスワードが一致していません。")
return
}
// データ登録
UserDefaults.standard.set(userName, forKey:"userName")
UserDefaults.standard.set(userPassword, forKey:"userPassword")
//UserDefaults.standard.synchronize();
// メッセージアラートなど
let myAlert = UIAlertController(title:"Alert", message: "どうも、登録完了!!", preferredStyle: UIAlertControllerStyle.alert)
let okAction = UIAlertAction(title:"OK", style: UIAlertActionStyle.default){
action in self.dismiss(animated: true, completion:nil)
}
myAlert.addAction(okAction)
self.present(myAlert, animated:true,completion:nil)
}
func displayMyAlertMessage(userMessage: String){
let myAlert = UIAlertController(title:"Alert", message: userMessage, preferredStyle: UIAlertControllerStyle.alert)
let okAction = UIAlertAction(title:"OK", style: UIAlertActionStyle.default, handler:nil)
myAlert.addAction(okAction);
self.present(myAlert,animated:true, completion:nil)
}
}
ログイン画面
LoginViewController.swift
import UIKit
class LoginViewController: UIViewController {
@IBOutlet weak var userNameTextField: UITextField!
@IBOutlet weak var userPasswordTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func loginButtonTapped(_ sender: Any) {
let userName = userNameTextField.text;
let userPassword = userPasswordTextField.text;
let userNameStored = UserDefaults.standard.string(forKey: "userName")
let userPasswordStored = UserDefaults.standard.string(forKey: "userPassword")
if(userNameStored == userName){
if(userPasswordStored == userPassword){
// ログイン！
UserDefaults.standard.set(true, forKey: "isUserLoggedIn")
//UserDefaults.standard.synchronize()
self.dismiss(animated: true, completion:nil)
}
}
}
}
メイン画面
ViewController.swift
import UIKit
class ViewController: UIViewController {
//@IBOutlet weak var imageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidAppear(_ animated: Bool) {
let isUserLoggedIn = UserDefaults.standard.bool(forKey: "isUserLoggedIn")
if(!isUserLoggedIn)
{
self.performSegue (withIdentifier: "loginView", sender: self)
}
}
@IBAction func LogoutButtonTapped(_ sender: Any) {
UserDefaults.standard.set(false, forKey: "isUserLoggedIn")
//UserDefaults.standard.synchronize()
self.performSegue(withIdentifier: "loginView", sender: self)
}
}
ご参考までに。
[2018年3月22日更新]
UserDefaults.standard.synchronize()は、全てコメントアウトしました。