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An iOS Developer's Guide to SwiftUI

You're reading from  An iOS Developer's Guide to SwiftUI

Product type Book
Published in May 2024
Publisher Packt
ISBN-13 9781801813624
Pages 446 pages
Edition 1st Edition
Languages
Author (1):
Michele Fadda Michele Fadda
Profile icon Michele Fadda

Table of Contents (25) Chapters

Preface 1. Part 1: Simple Views
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

Iterating views

In this section, I will describe how you can display multiple views, as you previously would have done in UIKit using UITableViews and UICollectionViews.

In UIKit, you would have, for the purpose of visualizing tables and grids, created derived classes inheriting from UITableViewControllers and UICollectionViewControllers. To control their appearance and behavior, you would have used properties and delegate methods.

In SwiftUI, you have several ways to achieve this result. The first is iterating, that is, repeating views with a loop. You can achieve this with the specialized view called ForEach. ForEach does not have the limitation of 10 maximum views that affect views entered manually.

For example, the following fragment of code will create a form containing 90 subviews:

Form {
         ForEach (0..<90) { number in
             Text("Hello...
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