如何在登录页面之后(而不是作为主视图)以编程方式实现TabViewBarController

import UIKit

class MainTabBarController: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建并配置各个子视图控制器
        let homeViewController = HomeViewController()
        let profileViewController = ProfileViewController()
        
        // 设置子视图控制器的标题和图标
        homeViewController.title = "首页"
        homeViewController.tabBarItem.image = UIImage(named: "home_icon")
        
        profileViewController.title = "个人资料"
        profileViewController.tabBarItem.image = UIImage(named: "profile_icon")
        
        // 将子视图控制器添加到TabBarController中
        self.viewControllers = [homeViewController, profileViewController]
    }
}