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SwiftUI Cookbook

SwiftUI Cookbook

By : Giordano Scalzo, Nzokwe
4.3 (20)
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SwiftUI Cookbook

SwiftUI Cookbook

4.3 (20)
By: Giordano Scalzo, 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)
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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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