iOS注册登录 源代码

以下是一个简单的iOS注册登录的源代码示例，使用Firebase作为后端服务：

**注：** 以下代码仅为示例，需要替换为自己的Firebase项目信息。

**AppDelegate.swift**

import UIKit
import Firebase

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Firebase配置
        FirebaseApp.configure()
        
        return true
    }
}

**LoginViewController.swift**

import UIKit
import Firebase

class LoginViewController: UIViewController {

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

    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    @IBAction func loginButtonTapped(_ sender: UIButton) {
        guard let email = emailTextField.text, !email.isEmpty else {
            showAlert(message: "请输入邮箱")
            return
        }
        
        guard let password = passwordTextField.text, !password.isEmpty else {
            showAlert(message: "请输入密码")
            return
        }
        
        Auth.auth().signIn(withEmail: email, password: password) { (user, error) in
            if let error = error {
                self.showAlert(message: error.localizedDescription)
            } else {
                self.dismiss(animated: true, completion: nil)
            }
        }
    }
    
    func showAlert(message: String) {
        let alert = UIAlertController(title: "提示", message: message, preferredStyle: .alert)
        let okAction = UIAlertAction(title: "确定", style: .default, handler: nil)
        alert.addAction(okAction)
        present(alert, animated: true, completion: nil)
    }
}

**SignupViewController.swift**

import UIKit
import Firebase

class SignupViewController: UIViewController {

    @IBOutlet weak var emailTextField: UITextField!
    @IBOutlet weak var passwordTextField: UITextField!
    @IBOutlet weak var confirmPasswordTextField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    @IBAction func signupButtonTapped(_ sender: UIButton) {
        guard let email = emailTextField.text, !email.isEmpty else {
            showAlert(message: "请输入邮箱")
            return
        }
        
        guard let password = passwordTextField.text, !password.isEmpty else {
            showAlert(message: "请输入密码")
            return
        }
        
        guard let confirmPassword = confirmPasswordTextField.text, !confirmPassword.isEmpty else {
            showAlert(message: "请确认密码")
            return
        }
        
        if password != confirmPassword {
            showAlert(message: "两次输入的密码不一致")
            return
        }
        
        Auth.auth().createUser(withEmail: email, password: password) { (user, error) in
            if let error = error {
                self.showAlert(message: error.localizedDescription)
            } else {
                self.dismiss(animated: true, completion: nil)
            }
        }
    }
    
    func showAlert(message: String) {
        let alert = UIAlertController(title: "提示", message: message, preferredStyle: .alert)
        let okAction = UIAlertAction(title: "确定", style: .default, handler: nil)
        alert.addAction(okAction)
        present(alert, animated: true, completion: nil)
    }
}

这个示例中包含两个视图控制器，分别是登录和注册。在故事版中，需要创建这两个视图控制器，并将其与相应的类关联。注意，这里使用了Firebase的Auth模块来处理用户身份验证。在Firebase控制台中，需要允许邮箱/密码身份验证提供程序，以便该示例代码可以正常工作。