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SwiftUI Cookbook

You're reading from   SwiftUI Cookbook A guide to solving the most common problems and learning best practices while building SwiftUI apps

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Product type Paperback
Published in Nov 2021
Publisher Packt
ISBN-13 9781803234458
Length 616 pages
Edition 2nd Edition
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Authors (2):
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Giordano Scalzo Giordano Scalzo
Author Profile Icon Giordano Scalzo
Giordano Scalzo
Edgar Nzokwe Edgar Nzokwe
Author Profile Icon Edgar Nzokwe
Edgar Nzokwe
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Toc

Table of Contents (17) Chapters Close

Preface 1. Chapter 1: Using the Basic SwiftUI Views and Controls 2. Chapter 2: Going Beyond the Single Component with Lists and Scroll Views FREE CHAPTER 3. Chapter 3: Exploring Advanced Components 4. Chapter 4: Viewing while Building with SwiftUI Preview 5. Chapter 5: Creating New Components and Grouping Views with Container Views 6. Chapter 6: Presenting Extra Information to the User 7. Chapter 7: Drawing with SwiftUI 8. Chapter 8: Animating with SwiftUI 9. Chapter 9: Driving SwiftUI with Data 10. Chapter 10: Driving SwiftUI with Combine 11. Chapter 11: SwiftUI Concurrency with async await 12. Chapter 12: Handling Authentication and Firebase with SwiftUI 13. Chapter 13: Handling Core Data in SwiftUI 14. Chapter 14: Creating Cross-Platform Apps with SwiftUI 15. Chapter 15: SwiftUI Tips and Tricks 16. Other Books You May Enjoy

Presenting alerts

A common way of showing important information to users is by using alerts with a message and some buttons. In this recipe, we will create a simple alert that gets displayed when a button is pressed.

The way alerts are presented in iOS 13 and 14 has been deprecated. iOS 15 introduced a new way of presenting alerts. For the sake of being able to handle devices on earlier iOS versions, we'll go over both ways of presenting alerts, starting with iOS 15. The code for iOS 13 and 14 alerts is found in the oldAlerts.swift file while the newer iOS 15 version is located in ContentView.swift.

Getting ready

Create a new SwiftUI project called PresentingAlerts.

Set the project's iOS Deployment Target to iOS 15.0.

How to do it

We will add a Button or Text to the scene that can be used to display an alert containing a single button.

The iOS 15 steps are as follows:

  1. Create a @State variable that will be used to trigger the presentation of our...
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