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You're reading from  SwiftUI Cookbook - Third Edition

Product typeBook
Published inDec 2023
Reading LevelIntermediate
PublisherPackt
ISBN-139781805121732
Edition3rd Edition
Languages
Swift
Tools
SwiftUI
Concepts
Design
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Author (1)
Juan C. Catalan
Juan C. Catalan
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Juan C. Catalan

Juan C. Catalan is a software engineer with more than 18 years of professional experience. He started mobile development back in the days of iOS 3. Juan has worked as a professional iOS developer in many industries, including medical devices, financial services, real estate, document management, fleet tracking and industrial automation. He has contributed to more than 30 published apps in the App Store, some of them with millions of users. Juan gives back to the iOS development community with technical talks, mentoring developers, reviewing technical books and now as a book author. He lives in Austin, Texas, with his wife Donna, where they spend time with their kids.
Read more about Juan C. Catalan

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Using mock data for previews

So far, we’ve built apps using our own data. However, when dealing with large projects, data is usually obtained by making API calls. However, that can be time-consuming and quickly become a bottleneck for our previews. The better option is to make some mock data available for previews only. We can tell Xcode not to bundle the data and resources used for previews with our app when we submit the app to the App Store.

In this recipe, we will store some mock JavaScript Object Notation (JSON) data on insects in our Preview Content folder and fetch our data from the file, instead of making API calls. JSON is a lightweight format used to store and transfer data.

Getting ready

Create a new SwiftUI project called UsingMockDataForPreviews.

To get access to the files used here, clone/download this project from GitHub: https://github.com/PacktPublishing/SwiftUI-Cookbook-3rd-Edition/.

How to do it…

We will add a JSON file with...

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SwiftUI Cookbook - Third Edition
Published in: Dec 2023Publisher: PacktISBN-13: 9781805121732
© 2023 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Juan C. Catalan

Juan C. Catalan is a software engineer with more than 18 years of professional experience. He started mobile development back in the days of iOS 3. Juan has worked as a professional iOS developer in many industries, including medical devices, financial services, real estate, document management, fleet tracking and industrial automation. He has contributed to more than 30 published apps in the App Store, some of them with millions of users. Juan gives back to the iOS development community with technical talks, mentoring developers, reviewing technical books and now as a book author. He lives in Austin, Texas, with his wife Donna, where they spend time with their kids.
Read more about Juan C. Catalan

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