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SwiftUI Cookbook

SwiftUI Cookbook

By : Giordano Scalzo, Nzokwe
4.8 (10)
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SwiftUI Cookbook

SwiftUI Cookbook

4.8 (10)
By: Giordano Scalzo, 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)
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Presenting multiple alerts

We have reviewed the process for displaying single alerts in a view. What happens if we have multiple alerts in a single view? When multiple alerts are attached to a view, only one of them works. To create a view with multiple alerts that work, we need to make sure each alert is tied to a different view.

Getting ready

Create a SwiftUI app named PresentingMultipleAlerts.

How to do it

We will create a VStack that holds two structs, with a .alert() modifier attached to each struct. We will use a button click and a Toggle struct to display alerts. The steps are as follows:

  1. Create the @State variable that will trigger the alerts. The variables should be declared immediately below the ContentView struct declaration and before the body variable:
    @State private var showTwoButtonsAlert = false
    @State private var showSimpleAlert = false
  2. Replace the Text struct with a VStack to hold the other structs. We will add the following:
    VStack{
    //The rest...
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