S01E06: [TDD 🍅 5] Testing View Controllers in Swift

Will Saults
7 min readJan 6, 2023

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Last Session

Photo by Hal Gatewood on Unsplash

It’s time to start the UI

First, create a new Project called QuizApp using Storyboards and Swift. Don’t fret 😮‍💨, we’ll look at using SwiftUI in future sessions!

Next, follow these steps:

  1. Delete the ViewController.swift, Main.storyboard, and SceneDelegate.swift
  2. Add var window: UIWindow? to AppDelegate.swift
  3. Remove UISceneSession Lifecycle ( functions ) in AppDelegate
  4. In target QuizApp > Info remove Main storyboard file base name
  5. Update your Info.plist file to the following:

Our AppDelegate will look like this:

import UIKit

class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
return true

Now, build and run (⌘R) and you should have an application that compiles and launches…



Will Saults

Staff Software Engineer, iOS dev mentor, agile champion, TDD advocate, and AR/VR enthusiast!