Book Image

Learn SwiftUI

By : Chris Barker
Book Image

Learn SwiftUI

By: Chris Barker

Overview of this book

SwiftUI is the new and powerful interface toolkit that lets you design and build iOS, iPadOS, and macOS apps using declarative syntax. It is a powerful way to develop the UI elements of applications, which would normally be tightly coupled to application logic. Learn SwiftUI will get you up to speed with the framework and cross-device UI development in no time. Complete with detailed explanations and practical examples, this easy-to-follow guide will teach you the fundamentals of the SwiftUI toolkit. You'll learn how to build a powerful iOS and iPadOS application that can be reused for deployment on watchOS. As you progress, you'll delve into UI and unit testing in iOS apps, along with learning how to test your SwiftUI code for multiple devices. The book will also show you how to integrate SwiftUI features such as data binding and network requests into your current application logic. By the end of this book, you will have learned how to build a cross-device application using the SwiftUI framework and Swift programming.
Table of Contents (17 chapters)

Persisting our recipe

In this section, we'll bundle up all the data we've received from our form and persist it down to our app so we can save the recipe and later view it via our main list or favorites. First, we'll look at how to convert the image we've taken into data so that we can successfully persist it to our UserDefaults and retrieve it again when necessary. We'll also cover how to use a fallback image if there is a problem accessing the image we've saved.

Once we've covered that, we'll use a helper function similar to the one we used for our favorites to both retrieve and save our recipe.

Persisting our image

First off, we'll need to make some tweaks to our RecipeModel...