Book Image

SwiftUI Cookbook - Second Edition

By : Giordano Scalzo, Edgar Nzokwe
Book Image

SwiftUI Cookbook - Second Edition

By: Giordano Scalzo, Edgar 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)

Displaying popovers

A popover is a view that can be displayed on screen to provide more information about a particular item. They include an arrow pointing to the location where they originate from. You can tap on any other screen area to dismiss the popover. Popovers are typically used on larger screens such as iPads.

In this recipe, we will create and display a popover on an iPad.

Getting ready

Create a new SwiftUI project named DisplayingPopovers.

How to do it

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

  1. Just above the body variable in the ContentView.swift file, add a state variable that will be used to trigger the display of the popover:
    @State private var showPopover = false
    }
  2. Within the body variable, replace the Text...