GCD
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What is GCD?
Grand Central Dispatch (GCD) is a C-based system for dispatching work to queues managed by the operating system. The main queue runs tasks on the main thread for UI updates, while serial and concurrent dispatch queues run background work. GCD is lightweight and efficient, and remains widely used alongside Swift's async/await model.
Free resources to learn GCD
- Official docsDispatch
- ArticleGrand Central Dispatch (GCD) in iOS: The Developer's Guide
- ArticleGrand Central Dispatch in iOS
More in stage 21: Concurrency and Multithreading
GCD: common questions
Can I learn GCD in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain GCD in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this GCD tutorial for beginners?
It is lesson 119 of 170 in the free iOS roadmap, in stage 21, Concurrency and Multithreading. If you are new to iOS, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.