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)

Implementing a popover

A popover is a transient view that appears above other content onscreen when you tap a control area. Popovers typically include an arrow pointing to the location from where it emerged and are dismissed by tapping another part of the screen or a button on the popover.

Popovers are typically used on larger screens and can contain a wide variety of elements. Anything from navigation bars, tables collections, or any other views. The Apple Human Interface guidelines recommend using popovers on iPads only and not iPhones.

In this recipe, we will create a simple popover with a text and display it on an iPad.

Getting ready

Create a new SwiftUI app named PopoverApp.

How to do it

Following the pattern we've used so far in this chapter, we shall first create an @State variable whose value triggers the displaying or hiding of a popover, and then add a .popover() modifier that displays the popover when the @State variable is true. The steps are as...