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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

iOS 17 changes in state management

State management is related to architecture in SwiftUI applications as, in a SwiftUI application, you need to bind state changes to the UI, as SwiftUI is declarative and does not have “methods” that you can call to determine changes in the UI. These changes need to be achieved by declaration and state binding. SwiftUI will automatically redraw the views affected by the changes in the underlying data.

With iOS 17 and Xcode 15, presented during the WWDC2023 conference, Apple introduced some variations to all the binding mechanisms we have just examined: @Observable is used rather than ObservableObject, while we are expected to use @Bindable to mark individual properties we would want to be able to bind. @Bindable usage is limited to classes marked as @Observable. If you deliberately want to avoid observing a property, you can use ObservationIgnored to mark that specific property.

The @Observable property wrapper is the easiest way...

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