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 custom view transitions

SwiftUI has a nice feature that gives us the possibility to add an animation when a view appears or disappears.

It is called Transition, and it can be animated with the usual degree of customization.

In this recipe, we'll see how to create custom appearing and disappearing transitions, combining different transitions.

Getting ready

This recipe uses two images courtesy of Erika Wittlieb (https://pixabay.com/users/erikawittlieb-427626/) from Pixabay (https://pixabay.com/).

You can find the images in the GitHub repo at https://github.com/PacktPublishing/SwiftUI-Cookbook/tree/master/Resources/Chapter07/recipe7, but you can also use your own images for this recipe.

Create a new SwiftUI project in Xcode called CustomViewTransitionApp, and copy the ch7-r7-i1.jpg and ch7-r7-i2.jpg images in the Assets catalog:

Figure 7.8 – Adding the images to the Assets catalog

How to do it…

We are going to...