从UITabBarController呈现视图控制器，但不显示选项卡栏

// 创建要显示的视图控制器
let viewController1 = UIViewController()
viewController1.view.backgroundColor = UIColor.red
viewController1.title = "ViewController 1"

let viewController2 = UIViewController()
viewController2.view.backgroundColor = UIColor.blue
viewController2.title = "ViewController 2"

// 创建UITabBarController实例
let tabBarController = UITabBarController()
tabBarController.viewControllers = [viewController1, viewController2]

// 隐藏选项卡栏
tabBarController.hidesBottomBarWhenPushed = true

// 呈现UITabBarController
present(tabBarController, animated: true, completion: nil)