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)

Previewing the layout in a navigation view

Some views are designed to be presented in a navigation stack but are not themselves part of a navigation view. One solution to this problem would be to run the application and navigate to the view in question. However, previews provide a time-saving way to figure out how the view would be displayed without running the app.

In this recipe, we will create an app with a view that is part of the navigation stack and preview it in a navigation view.

Getting ready

Let's create a SwiftUI app called PreviewingInNavigationView.

How to do it…

We will add a NavigationView and NavigationLink components to ContentView that lead to a second view. The second view will not contain a navigation view but will be previewed in one. The steps are as follows:

  1. Replace the Text view in ContentView with a navigation view containing a VStack component and NavigationLink to a view called SecondView:
     NavigationView {