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The Ultimate iOS Interview Playbook

You're reading from   The Ultimate iOS Interview Playbook Conquer Swift, frameworks, design patterns, and app architecture for your dream job

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Product type Paperback
Published in Aug 2023
Publisher Packt
ISBN-13 9781803246314
Length 320 pages
Edition 1st Edition
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Author (1):
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Avi Tsadok Avi Tsadok
Author Profile Icon Avi Tsadok
Avi Tsadok
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Toc

Table of Contents (20) Chapters Close

Preface 1. Part 1: Everything about Interviews
2. Chapter 1: Before the Interview FREE CHAPTER 3. Chapter 2: Going through the Interview Process 4. Chapter 3: Developer Branding 5. Part 2: Swift Language and Coding
6. Chapter 4: Data Structures and Algorithms 7. Chapter 5: The Swift Programming Language 8. Chapter 6: Managing Your Code 9. Part 3: The Frameworks
10. Chapter 7: Building Great User Experiences with UIKit 11. Chapter 8: SwiftUI and Declarative Programming 12. Chapter 9: Understanding Persistent Memory 13. Chapter 10: Libraries Management 14. Part 4: Design and Architecture
15. Chapter 11: Design Patterns to Solve Complex Questions 16. Chapter 12: Drilling into App Architecture 17. Chapter 13: Acing the Coding Assessment 18. Index 19. Other Books You May Enjoy

Expertise with the SwiftUI life cycle

We can’t build UI screens without fully understanding the UI life cycle. States and modifiers such as onChange and onAppear are integral to the SwiftUI life cycle and essential to building a functional application.

We already went on some of the things related to the SwiftUI life cycle in the previous sections – for example, observed objects and states are part of the SwiftUI life cycle. Now, we must understand how they work when a view needs to reload, change, or move to a new screen.

“How does SwiftUI handle state changes during the view life cycle?”

Why is this question important?

SwiftUI’s approach to state management differs from traditional UIKit or AppKit approaches, and it’s crucial to understand how SwiftUI handles state changes and updates to avoid unexpected behavior in our app.

What is the answer?

SwiftUI generates the view hierarchy based on the current state. SwiftUI generates...

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