Book Image

SwiftUI Cookbook - Second Edition

By : Giordano Scalzo, Edgar Nzokwe
Book Image

SwiftUI Cookbook - Second Edition

By: Giordano Scalzo, Edgar Nzokwe

Overview of this book

SwiftUI provides an innovative and simple way to build beautiful user interfaces (UIs) for all Apple platforms, from iOS and macOS through to watchOS and tvOS, using the Swift programming language. In this recipe-based cookbook, you’ll cover the foundations of SwiftUI as well as the new SwiftUI 3 features introduced in iOS 15 and explore a range of essential techniques and concepts that will help you through the development process. The cookbook begins by explaining how to use basic SwiftUI components. Once you’ve learned the core concepts of UI development, such as Views, Controls, Lists, and ScrollViews, using practical implementations in Swift, you'll advance to adding useful features to SwiftUI using drawings, built-in shapes, animations, and transitions. 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 by 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 encountered when building SwiftUI apps.
Table of Contents (17 chapters)

Adding SwiftUI to an existing app

In this recipe, we will learn how to navigate from a UIKit view to a SwiftUI view while passing a secret text to our SwiftUI view.

We'll be making use a UIKit storyboard, a visual representation of the UI in UIKit. The Main.storyboard file is to UIKit what the ContentView.swift file is to SwiftUI. They are both the default home views that are created when you start a new project.

We start off this project with simple UIKit project that contains a button.

Getting ready

Get the following ready before starting out with this recipe:

  1. Clone or download the code for this book from GitHub: https://github.com/PacktPublishing/SwiftUI-Cookbook-2nd-Edition-/tree/main/Chapter01-Using-the-basic-SwiftUI-Views-and-Controls/10-Adding-SwiftUI-to-UIKit.
  2. Open the StartingPoint folder and double-click on AddSwiftUIToUIKit.xcodeproj to open the project in Xcode.

How to do it…

We will add a NavigationController to the UIKit ViewController...