Book Image

SwiftUI Cookbook

By : Giordano Scalzo, Edgar Nzokwe
Book Image

SwiftUI Cookbook

By: Giordano Scalzo, Edgar Nzokwe

Overview of this book

SwiftUI is an innovative and simple way to build beautiful user interfaces (UIs) for all Apple platforms, right from iOS and macOS through to watchOS and tvOS, using the Swift programming language. In this recipe-based book, you’ll work with SwiftUI and explore a range of essential techniques and concepts that will help you through the development process. The recipes cover the foundations of SwiftUI as well as the new SwiftUI 2.0 features introduced in iOS 14. Other recipes will help you to make some of the new SwiftUI 2.0 components backward-compatible with iOS 13, such as the Map View or the Sign in with Apple View. The cookbook begins by explaining how to use basic SwiftUI components. Then, you’ll learn the core concepts of UI development such as Views, Controls, Lists, and ScrollViews using practical implementation in Swift. By learning drawings, built-in shapes, and adding animations and transitions, you’ll discover how to add useful features to the SwiftUI. When you’re ready, you’ll understand how to integrate SwiftUI with exciting new components in the Apple development ecosystem, such as Combine for managing events and Core Data for managing app data. Finally, you’ll write iOS, macOS, and watchOS apps while sharing the same SwiftUI codebase. By the end of this SwiftUI book, you'll have discovered a range of simple, direct solutions to common problems found in building SwiftUI apps.
Table of Contents (15 chapters)

Creating an iOS app in SwiftUI

Before going Cross-Platform with your development, we will first create an iOS app. This app will be similar to the app created during our work on the Using mock data for previews recipe in Chapter 3, Viewing while Building with SwiftUI Preview. The version created for this recipe will be made more modular to allow for code reuse across platforms and the resources will not be stored in the preview section of the app.

The app will display a list of insects where you can click on any insect in the list to see more details about it. The data regarding the insects will be read from a JSON file and made available to our views through the use of an @Environment variable.

Getting ready

Let's create a new single-view iOS app in SwiftUI named Cross-Platform.

How to do it

We will set up the model and data source used in this recipe and then proceed to create the views and subviews needed to display the list of insects and the details of each...