Xcode11 programmatically layout preparation without Storyboard

How to delete Main.storyboard and how to prepare UIKit programmatically layout in Xcode11.

1. Create a new project in Xcode11 with Swift and Storyboard

Choose Swift and Storyboard.

2. Delete “Main.storyboard” in the Navigation pane

3. Delete “Main” letter

Navigation pane → PROJECT-NAME → TARGETS → General → Deployment Info → Main Interface

4. Remove the item “Storyboard Name" in Info.plist

Expand Info.plist → Application Scene Manifest (expand)→ Scene Configuration (expand) → Application Session Role (expand) → Item 0 (Default Config… (expand). Delete the item “Storyboard Name” .

5. Replace defaultscene(_:willConnectTo:options:) to the following code:

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
guard let windowScene = (scene as? UIWindowScene) else { return }
window = UIWindow(frame: UIScreen.main.bounds)
let viewController = ViewController()
window?.rootViewController = viewController
window?.makeKeyAndVisible()
window?.windowScene = windowScene
}

For example,

5. Try test run after adding some code in ViewController.swift

Add some code in ViewController.swift .

For example:

import UIKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        view.backgroundColor = .cyan
    }
}

After adding the bellow code, try run this project. If successful, iOS simulator will show up colored background.