Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
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

Arrow left icon
Product type Paperback
Published in May 2024
Publisher Packt
ISBN-13 9781801813624
Length 446 pages
Edition 1st Edition
Languages
Tools
Concepts
Arrow right icon
Author (1):
Arrow left icon
Michele Fadda Michele Fadda
Author Profile Icon Michele Fadda
Michele Fadda
Arrow right icon
View More author details
Toc

Table of Contents (25) Chapters Close

Preface 1. Part 1: Simple Views
2. Chapter 1: Exploring the Environment – Xcode, Playgrounds, and SwiftUI FREE CHAPTER 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

Using CALayers in SwiftUI

SwiftUI does not support CALayers directly, the equivalent functionality has been essentially combined within Views themselves.

There is also no compelling reason to use CALayers to obtain further acceleration, as that has also been implemented by other means in SwiftUI; in particular, there is no need to use CALayers to render really complex hierarchies of views because SwiftUI does not use Auto Layout. In UIKit, that would have had a rendering cost that increases with the number of views to be rendered. There is not a “layer” abstraction on top of View in SwiftUI.

That said, there are times when you need to implement code that was originally developed for UIKit. SwiftUI provides a protocol, UIViewRepresentable, that can be used for this purpose and allows to basically embed a UIView within a SwiftUI view.

If you need to use a custom UIView within SwiftUI, bear in mind that it is faster to use CALayers rather than Core Graphics.

...
lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image