Swift Actors: The Complete Master Course (Swift 6 & Modern iOS)

Niraj Paul

10 min read

·

Sep 2, 2026

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📑 Table of Contents

1. Actor Fundamentals
2. Accessing Actor Properties
3. Actor Isolation Deep Dive
4. Actor Reentrancy
5. Actor vs @MainActor
6. Global Actors
7. Sendable Protocol & Concurrency Domains
8. Actor vs Lock vs Serial Queue vs Semaphore
9. Actors + Structured Concurrency (async/await, Task, TaskGroup)
10. Real Production Example: Thread-Safe Image Cache
11. Actor + SwiftUI Architecture
12. Actor-Based Networking (Class vs Actor)
13. Actor-Based Token Manager (Single-Flight Pattern)
14. 15 Common Actor Mistakes & How to Fix Them
15. Actor Performance & Actor Hops
16. Actor Reentrancy Deep Dive: 3 Production Bugs & Fixes
17. Actors & Swift 6 Strict Concurrency
18. ThenonisolatedKeyword
19. Unit Testing Actors with XCTest / Swift Testing
20. Comprehensive Interview Preparation (65 Q&As)
21. Visual Mental Models & ASCII Execution Diagrams
22. Production Architecture Blueprint
23. Hands-On Exercises (7 Progressive Levels)
24. One-Page Actor Cheat Sheet