What is the method to programmatically include tabs in a UITabBarController using Swift?

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Here is the code to programmatically include tabs in a UITabBarController using Swift:

// create the view controllers for each tab
let firstViewController = UIViewController()
firstViewController.tabBarItem = UITabBarItem(title: "First", image: UIImage(named: "firstIcon"), selectedImage: nil)

let secondViewController = UIViewController()
secondViewController.tabBarItem = UITabBarItem(title: "Second", image: UIImage(named: "secondIcon"), selectedImage: nil)

let thirdViewController = UIViewController()
thirdViewController.tabBarItem = UITabBarItem(title: "Third", image: UIImage(named: "thirdIcon"), selectedImage: nil)

// create the tab bar controller and set its view controllers array
let tabBarController = UITabBarController()
tabBarController.viewControllers = [firstViewController, secondViewController, thirdViewController]

// set the tab bar controller as the root view controller of the window
window?.rootViewController = tabBarController

In this example, we first create a view controller for each tab and set their tabBarItem property to show the title and icon for each tab. We then create the UITabBarController and set its viewControllers array to the array of view controllers we just created. Finally, we set the UITabBarController as the root view controller of the window.