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An iOS Developer's Guide to SwiftUI

You're reading from   An iOS Developer's Guide to SwiftUI Design and build beautiful apps quickly and easily with minimum code

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Product type Paperback
Published in May 2024
Publisher Packt
ISBN-13 9781801813624
Length 446 pages
Edition 1st Edition
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Author (1):
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Michele Fadda Michele Fadda
Author Profile Icon Michele Fadda
Michele Fadda
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Table of Contents (25) Chapters Close

Preface 1. Part 1: Simple Views FREE CHAPTER
2. Chapter 1: Exploring the Environment – Xcode, Playgrounds, and SwiftUI 3. Chapter 2: Adding Basic UI Elements and Designing Layouts 4. Chapter 3: Adding Interactivity to a SwiftUI View 5. Part 2: Scrollable Views
6. Chapter 4: Iterating Views, Scroll Views, FocusState, Lists, and Scroll View Reader 7. Chapter 5: The Art of Displaying Grids 8. Part 3: SwiftUI Navigation
9. Chapter 6: Tab Bars and Modal View Presentation 10. Chapter 7: All About Navigation 11. Part 4: Graphics and Animation
12. Chapter 8: Creating Custom Graphics 13. Chapter 9: An Introduction to Animations in SwiftUI 14. Part 5: App Architecture
15. Chapter 10: App Architecture and SwiftUI Part I: Practical Tools 16. Chapter 11: App Architecture and SwiftUI Part II – the Theory 17. Part 6: Beyond Basics
18. Chapter 12: Persistence with Core Data 19. Chapter 13: Modern Structured Concurrency 20. Chapter 14: An Introduction to SwiftData 21. Chapter 15: Consuming REST Services in SwiftUI 22. Chapter 16: Exploring the Apple Vision Pro 23. Index 24. Other Books You May Enjoy

Creating a Core Data project

The easiest way to create a project that includes Xcode is by choosing a template and checking the Use Core Data option box.

The following screenshot shows this:

Figure 12.2 – Creating a project and enabling Core Data

Figure 12.2 – Creating a project and enabling Core Data

By following this approach, the project template will create an @main App struct that instantiates PersistenceController as a singleton. The name you choose for the project in Xcode will be pre-pended to the app to determine the default name for that struct, and this will match the corresponding swift file generated by the template. The project creation template will create code inside that file that passes this PersistenceController and the public managedObjectContext, using .environment at the Composition Root so that they can be accessed globally by any view in the app. Note that .environment is used instead of .environmentObject, as these are system- rather than user-defined.

The ”Composition...

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