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Date
Sep. 8th, 2024
 
2024年 8月 6日

Post: iOS 面试题: GCD Queue

iOS 面试题: GCD Queue

Published 12:10 Oct 14, 2015.

Created by @ezra. Categorized in #Programming, and tagged as #iOS.

Source format: Markdown

Table of Content

最近遇到和看到的一些面试题。

GCD里面有哪几种Queue?你自己建立过串行queue吗?背后的线程模型是什么样的?

  • 主队列 dispatch_main_queue(); 串行 ,更新UI
  • 全局队列 dispatch_global_queue(); 并行,四个优先级: background,low,default,high
  • 自定义队列 dispatch_queue_t queue; 可以自定义是并行: DISPATCH_QUEUE_CONCURRENT 或者串行 DISPATCH_QUEUE_SERIAL
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