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SwiftUI Cookbook

You're reading from   SwiftUI Cookbook Discover solutions and best practices to tackle the most common problems while building SwiftUI apps

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Product type Paperback
Published in Oct 2020
Publisher Packt
ISBN-13 9781838981860
Length 614 pages
Edition 1st Edition
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Authors (2):
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Edgar Nzokwe Edgar Nzokwe
Author Profile Icon Edgar Nzokwe
Edgar Nzokwe
Giordano Scalzo Giordano Scalzo
Author Profile Icon Giordano Scalzo
Giordano Scalzo
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Toc

Table of Contents (15) Chapters Close

Preface 1. Chapter 1: Using the Basic SwiftUI Views and Controls 2. Chapter 2: Going Beyond the Single Component with Lists and Scroll Views FREE CHAPTER 3. Chapter 3: Viewing while Building with SwiftUI Preview 4. Chapter 4: Creating New Components and Grouping Views in Container Views 5. Chapter 5: Presenting Extra Information to the User 6. Chapter 6: Drawing with SwiftUI 7. Chapter 7: Animating with SwiftUI 8. Chapter 8: Driving SwiftUI with Data 9. Chapter 9: Driving SwiftUI with Combine 10. Chapter 10: Handling Authentication and Firebase with SwiftUI 11. Chapter 11: Handling Core Data in SwiftUI 12. Chapter 12: Cross-Platform SwiftUI 13. Chapter 13: SwiftUI Tips and Tricks 14. Other Books You May Enjoy

Implementing asynchronous images in SwiftUI

Most of the app you are going to implement depends on a remote service that provides data.

Imagine an e-commerce app or a hotel booking app.

All the content is on the server, and the app must download it and present it smoothly, taking care of the possible delay, lag, error, and so on. An essential part of this content is images. We could download and synchronously present images, but that would mean blocking the UI waiting for the download, making the app clunky and unpleasant to use.

That said, implementing images that asynchronously download and present themselves is a valuable tool to have in our toolbox.

In this recipe, we are going to implement an AsyncImage component that you can reuse in your apps whenever you need this feature.

Getting ready

No external resources are needed in this recipe, so just create a SwiftUI project in Xcode called AsyncImageApp.

How to do it

Two ingredients make the recipe: an ImageFetcher...

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