Hopefully this project has shown you how to take the skills you know – SwiftUI’s forms, pickers, steppers, and navigation – and build them into an app that sends all the user’s data off to a server and processes the response.
You might not realize this yet, but the skills you learned in this project are the most important skills for the vast majority of iOS developers: take user data, send it to a server, and process the response probably accounts for half the non-trivial apps in existence. Yes, what data gets sent and how it’s used to update the UI varies massively, but the concepts are identical.
Anyone can sit through a tutorial, but it takes actual work to remember what was taught. It’s my job to make sure you take as much from these tutorials as possible, so I’ve prepared a short review to help you check your learning.
One of the best ways to learn is to write your own code as often as possible, so here are three ways you should try extending this app to make sure you fully understand what’s going on.
placeOrder()fails – for example if there is no internet connection – show an informative alert for the user. To test this, try commenting out the
request.httpMethod = "POST"line in your code, which should force the request to fail.
Orderclass so it saves data such as the user's delivery address to
UserDefaults. This takes a little thinking, because
@AppStoragewon't work here, and you'll find getters and settings cause problems with
Codablesupport. Can you find a middle ground?
Hacking with Swift+ subscribers can get a complete video solution for this checkpoint here: Solution to Cupcake Corner. If you don’t already subscribe, you can start a free trial today.
SAVE 50% To celebrate Black Friday, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.
Link copied to your pasteboard.