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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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Showing a PDF in SwiftUI

Since iOS 11, Apple has provided PDFKit, a robust framework to display and manipulate PDF documents in your applications.

As you can imagine, PDFKit is based on UIKit. However, in this recipe, we'll see how easy it is to integrate it with SwiftUI.

Getting ready

Let's create a new SwiftUI app in Xcode called PDFReader.

For this, we need a PDF document to present. We provide an example in the https://github.com/PacktPublishing/SwiftUI-Cookbook-2nd-Edition-/blob/main/Resources/Chapter15/recipe3/PDFBook.pdf repository but feel free to use the PDF document of your choice.

Copy the document into the project:

Figure 15.13 – PDF document in the Xcode project

With the PDF document in the project, we are ready to implement our PDF viewer in SwiftUI.

How to do it…

PDFKit provides a class called PDFView to render a PDF document.

Because the PDFView class is a subclass of UIView, it must be encapsulated...

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