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)

Chapter 5: Presenting Extra Information to the User

In this chapter, we shall look at how to present extra information to the user using alerts, modals, context menus, and popovers.

When interacting with mobile applications, we expect a certain level of handholding. If we are about to perform an irreversible action such as delete a file, we expect an alert to pop up and ask for confirmation if we want to perform the requested action. Depending on our response, the file may be deleted or not. We also expect to click on certain buttons/links to see extra information regarding a topic.

Since SwiftUI is a declarative programming language, presenting extra information to the user involves adding modifiers to already existing views. It is possible to add one or several such modifiers to a view and set the conditions for each to be triggered.

The list of topics for this chapter is as follows:

  • Presenting alerts
  • Adding actions to alert buttons
  • Presenting multiple alerts...