Use of IOS GCD

GCD Grand Central Dispatch pure C language writing

1. GCD is Apple's solution for multi-core parallel computing

GCD will automatically take advantage of more CPU cores (such as dual-core, quad-core)

GCD automatically manages the life cycle of threads (create threads, schedule tasks, destroy threads)

Programmers just need to tell gcd what tasks they want to perform, without having to write any thread management code

2. Using GCD is a sentence: Add the task you want to perform to the task queue

3. Serial queue, parallel queue, synchronous task, asynchronous task. Asynchronous tasks will open up threads

Use of IOS GCD