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)

Previewing a layout in a NavigationView

Some views are designed to be presented in a navigation stack but are not part of a NavigationView. 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 view UI change live without rebuilding 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 NavigationView.

Getting ready

Let's create a SwiftUI app called PreviewingInNavigationView.

How to do it

We will add a NavigationView and NavigationLink component to the ContentView struct. The NavigationLink opens up a second view that doesn't contain a NavigationView. Since the second view will always be displayed in a navigation stack, we will update the preview to always display our design within a NavigationView. The steps are as follows:

  1. Replace the Text view in ContentView with a NavigationView containing a VStack...