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)

Navigating between multiple views with TabView

Navigation views are ideal for displaying hierarchical data because they allow users to drill down into data. However, navigation views don't work well with unrelated data. We use SwiftUI's TabView struct for that purpose.

Getting ready

Create a new SwiftUI iOS app named UsingTabViews.

How to do it…

We will create an app with two TabView structs. One will display the made-up best games of 2021, while the other displays various currencies used around the world. The steps are given here:

  1. Create a new SwiftUI view file named HomeView:

    a. Press Command ()+ N.

    b. Select SwiftUI View.

    c. Click Next.

    d. Enter HomeView in the Save as field.

    e. Click Finish.

  2. Update HomeView.swift to display a list of games from a string array named games:
    let games = ["Doom", "Final F","Cyberpunk",
      "avengers", "animal trivia", "sudoku", "snakes and
    &...