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 a hero view transition with .matchedGeometryEffect

Do you know what a hero transition is? If you don't know the term, you have still probably seen it many times.

Maybe in an e-commerce app, where with a list of products where each product has a thumbnail to show the product, selecting an item flies it to a details page, with a big image of the same product. The smooth animation from the thumbnail to the big image is called a "hero transition."

Another example is the cover image animation in the Apple Music player, transitioning from the mini-player to the full-player.

In iOS 14, SwiftUI introduced a modifier, .matchedGeometryEffect, which makes it very easy to implement this kind of animation almost without any effort.

Getting ready

This recipe uses a few images courtesy of Pixabay (

You can find the images in the GitHub repo at