Today, we’ll be looking at how to create a simple SwiftUI screen for adding a new book to Firestore. Along the way, we will refactor our existing code and introduce a new view model. And since Peter likes to live on the bleeding edge, we will use some features Apple announced at WWDC 2020 just a few days ago.

Chapters:

• 0:00 Introduction
• 0:49 A closer look at the screen flow of our application
• 2:02 Implementing a a view model for our new screen
• 2:55 Building a new screen for adding new books
• 3:37 Instantiating the view model
• 4:01 Why we use @StateObject
• 7:32 Saving a book to Firestore from our view model
• 8:28 Navigating to the new screen from our main screen
• 10:40 Demo time!
• 11:07 What’s wrong with the NumberFormatter?
• 12:00 Peter discusses the UX (or the lack thereof) of having to hit [enter] to trigger the NumberFormatter
• 12:31 Implementing a modification tracker using Combine
• 16:38 Challenge: implement a better modification tracker!
• 17:42 Wrap-up

#firebase #swift #developer #firestore