Integrating SwiftUI into UIKit Apps

A detailed guide on gradually adopting SwiftUI in UIKit projects.

Discover all the possible ways to add SwiftUI views to an existing UIKit app
See how fast you can develop new components in SwiftUI and preview them instantly in Xcode canvas
Take your existing apps to the next level by adding new iOS 16 features, such as Swift Charts and Lock Screen widgets
Learn how to keep supporting older iOS versions at the same time
Migrate larger parts of your apps to SwiftUI while reusing views and controllers built in UIKit

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Please, contact us if you wish to purchase for more than 10 readers, and we will organize a special discount for you.

What is included

Online book access

High quality EPUB and PDF downloads

Over 200 pages of content

6 full projects with sample code

Free lifetime updates to the book

What it covers

Developing user interfaces with SwiftUI: state and data management, styling, layout, accessibility
Learning the fundamentals of the SwiftUI framework to use it and integrate it efficiently
Using Xcode previews when designing and building UI
Integrating SwiftUI inside UIKit views and controllers with UIHostingController
Presenting controllers containing SwiftUI hierarchy programmatically and in storyboards
Setting up data flow between UIKit and embedded Swift components
Sizing and positioning SwiftUI views inside a UIKit controller
Taking full advantage of the new iOS 16 features
Supporting multiple iOS version at the same time
Building custom collection view cell configurations in SwiftUI
Adding charts built with the new Swift Charts framework to existing UIKit apps
Making widgets with WidgetKit and SwiftUI including iOS 16 Lock Screen widgets
Migrating from UIKit to the SwiftUI app lifecycle
Bringing existing views and controllers built in UIKit into SwiftUI during migration
Wrapping UIKit views and controllers with UIViewRepresentable and UIViewControllerRepresentable to be used in SwiftUI
Previewing UIViewControllers and UIViews in Xcode previews
Setting up bidirectional data flow between wrapped UIKit components and the SwiftUI app

Who the book is for

This book is for UIKit developers who would like to use SwiftUI in their existing UIKit projects. You should have some experience using Xcode to build iOS applications with the Swift language and the UIKit framework. SwiftUI experience is welcome but not strictly required. The first chapter of the book that covers SwiftUI essentials should get you up to speed. You can also improve your SwiftUI knowledge as you progress through the book by following along with the code and studying additional materials from the further reading sections.

The book comes with sample code for each chapter. We provide starter projects with initial setup and assets, as well as final projects with completed examples.

To follow along you would need the latest version of Xcode 14.

About the author

Natalia PanferovaiOS and macOS engineer

Natalia has many years of experience building mobile apps working in both small startups and large companies. Before joining Nil Coalescing in April 2022 she was part of the core SwiftUI team at Apple designing and building SwiftUI APIs. She is passionate about the framework and enjoys sharing her SwiftUI knowledge with the community.

Full table of contents

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