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)

Nesting and decoration

Just from the examples in the previous section, you've seen the immediate benefit of not only SwiftUI but how it uses the declarative syntax to create Views and add them to your application.

In this section, we are going to dive a little deeper down the rabbit hole and look at how declarative syntax makes use of modifiers to decorate our Views and how to best handle adding multiple Views inside each other without getting into too much trouble.


Modifiers in SwiftUI are a simple yet effective way of rendering custom interactions and decoration. Let's take our previous example, add some basic modifiers, and see what we get:

struct ContentView: View {
var body: some View {