For Day 89, we learned how to detect when our app moves to the background or foreground so we could pause and restart our timer at the right moment. #100DaysOfSwiftUI

The iOS Simulator displays a trivia app with a question card reading, “Who played the 13th Doctor in Doctor Who” and a timer showing 89 seconds remaining. On the right is a “check” button and on the left is a “cancel” button. The background is a scratched metal texture.