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)

Presenting ActionSheet views

The SwiftUI ActionSheet and Alert views are both used to request additional information from the user by interrupting the normal flow of the app to display a message. ActionSheet provides the user with additional choices related to an action they are currently taking, whereas the Alert view informs the user if something unexpected happens or they are about to perform an irreversible action.

In this recipe, we will create an action sheet that gets displayed when the user taps some text in the view.

Getting ready

Create a SwiftUI app named PresentingActionSheet.

How to do it

We will implement an action sheet by adding a .actionSheet() modifier to a view as well as a trigger that changes the value of a variable used to determine if the sheet is shown or not. The steps are as follows:

  1. Below the ContentView struct but above the body variable, add an @State variable to store the state of the action sheet:
    @State private var showSheet =...