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)

Navigating between multiple views with TabView

Navigation views are ideal for displaying hierarchical data because they allow users to drill down into the data. Navigation views, however, 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 where one displays the top games of 2020, while the other displays some world currencies. The steps are as follows:

  1. Create a SwiftUI view called HomeView:

    a. Press + N.

    b. Select SwiftUI View.

    c. Click Next.

    d. Click on the Save as field and enter the text HomeView.

  2. Before the struct HomeView line, create a string array containing the various games:
    let games = ["Doom", "Final F","Cyberpunk", "avengers",  "animal trivia", "sudoku", "snakes and ladders", "Power  &...