Operation Queues

Lesson in the iOS Roadmap · Stage 21: Concurrency and Multithreading

Last updated 14 September 2026

What is Operation Queues?

Operation Queues manage collections of NSOperation objects and execute them concurrently or serially. Operations support dependencies on each other, cancellation, and priority settings. Operation Queues provide a higher-level abstraction than GCD and are useful when tasks have complex interdependencies or need explicit cancellation logic.

Study this in the interactive course See the whole iOS roadmap

Free resources to learn Operation Queues

Official docsOperationQueue
ArticleGetting started with Operations and OperationQueues in Swift
ArticleWorking with Operation Queue in Swift: Managing Multithreading and Cancelling Operations

Operation Queues: common questions

Can I learn Operation Queues 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 Operation Queues 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 Operation Queues tutorial for beginners?

It is lesson 120 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.