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)

Adding images from our library

For this section, we're going to use some boilerplate code in order to get our app to select images directly from our camera library (or camera roll as some may refer to it) and insert them into our app. While this is a useful way to integrate image lookup from within SwiftUI, it is a little advanced and out of scope for this book.

First of all, make sure you've downloaded the source code for this chapter. Once you've got this, you're looking for a file called ImageHelper.swift. Simply drag the file from Finder into your File Tree (place it just under your existing Helper.swift file).

The file we've added is a helper. It accesses the photo library and returns an image that has been selected by the user. We'll see shortly how that all hooks up.

If you are interested in how we achieve this, take a look at the links in...