iPhone 界面生成器和代表

iPhone 界面生成器和代表：简化开发流程，提高效率

swift
import UIKit
class LoginViewController: UIViewController {
    
    @IBOutlet weak var usernameTextField: UITextField!
    @IBOutlet weak var passwordTextField: UITextField!
    @IBOutlet weak var loginButton: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置界面布局和样式
        usernameTextField.placeholder = "请输入用户名"
        passwordTextField.placeholder = "请输入密码"
        loginButton.setTitle("登录", for: .normal)
        loginButton.backgroundColor = UIColor.blue
        loginButton.setTitleColor(UIColor.white, for: .normal)
    }
    
    @IBAction func loginButtonTapped(_ sender: Any) {
        // 处理登录逻辑
        let username = usernameTextField.text ?? ""
        let password = passwordTextField.text ?? ""
        
        if username == "admin" && password == "123456" {
            // 登录成功
            showHomeScreen()
        } else {
            // 登录失败
            showAlert(message: "用户名或密码错误")
        }
    }
    
    func showHomeScreen() {
        // 跳转到主界面
        let homeViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "HomeViewController")
        navigationController?.pushViewController(homeViewController, animated: true)
    }
    
    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)
    }
}