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2024/04/28/iOS/深入解析 iOS-RunLoop：事件驱动的核心机制 Expand file tree Collapse file tree Original file line number Diff line number Diff line change 1616 hexoVersion : '6.3.0'
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2.</ span > < span class ="toc-text "> 什么是 Even Loop</ span > </ a > </ li > < li class ="toc-item toc-level-2 "> < a class ="toc-link " href ="#RunLoop-%E7%9A%84%E5%B7%A5%E4%BD%9C%E5%8E%9F%E7%90%86 "> < span class ="toc-number "> 3.</ span > < span class ="toc-text "> RunLoop 的工作原理</ span > </ a > </ li > < li class ="toc-item toc-level-2 "> < a class ="toc-link " href ="#RunLoop-%E7%9A%84%E5%AE%9E%E7%8E%B0%E7%BB%86%E8%8A%82 "> < span class ="toc-number "> 4.</ span > < span class ="toc-text "> RunLoop 的实现细节</ span > </ a > < ol class ="toc-child "> < li class ="toc-item toc-level-3 "> < a class ="toc-link " href ="#RunLoop-%E5%85%A5%E5%8F%A3 "> < span class ="toc-number "> 4.1.</ span > < span class ="toc-text "> RunLoop 入口</ span > </ a > </ li > < li class ="toc-item toc-level-3 "> < a class ="toc-link " href ="#RunLoop-%E6%A0%B8%E5%BF%83 "> < span class ="toc-number "> 4.2.</ span > < span class ="toc-text "> RunLoop 核心</ span > </ a > </ li > </ ol > </ li > < li class ="toc-item toc-level-2 "> < a class ="toc-link " href ="#RunLoop-%E4%B8%8E-RunLoopMode "> < span class ="toc-number "> 5.</ span > < span class ="toc-text "> RunLoop 与 RunLoopMode</ span > </ a > </ li > < li class ="toc-item toc-level-2 "> < a class ="toc-link " href ="#%E5%85%B3%E4%BA%8E-CommonModes "> < span class ="toc-number "> 6.</ span > < span class ="toc-text "> 关于 CommonModes</ span > </ a > </ li > < li class ="toc-item toc-level-2 "> < a class ="toc-link " href ="#RunLoop-%E4%B8%8E%E7%BA%BF%E7%A8%8B%E7%9A%84%E5%85%B3%E7%B3%BB "> < span class ="toc-number "> 7.</ span > < span class ="toc-text "> RunLoop 与线程的关系</ span > </ a > </ li > < li class ="toc-item toc-level-2 "> < a class ="toc-link " href ="#%E8%8B%B9%E6%9E%9C%E5%88%A9%E7%94%A8-RunLoop-%E5%AE%9E%E7%8E%B0%E7%9A%84%E5%8A%9F%E8%83%BD "> < span class ="toc-number "> 8.</ span > < span class ="toc-text "> 苹果利用 RunLoop 实现的功能</ span > </ a > < ol class ="toc-child "> < li class ="toc-item toc-level-3 "> < a class ="toc-link " href 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19- < p > 由 布多(budo) 发布于 2024-04-28 • 最后更新于 2025-02-27 </ p >
19+ < p > 由 布多(budo) 发布于 2024-04-28 • 最后更新于 2025-03-21 </ p >
2020</ blockquote >
2121< h2 id ="前言 "> < a href ="#前言 " class ="headerlink " title ="前言 "> </ a > 前言</ h2 > < p > RunLoop 是 iOS 开发中的一个基础概念，苹果有许多功能都依赖于 RunLoop，例如线程中的自动释放池、NSTimer、系统事件响应、屏幕刷新等。本文将深入剖析 iOS 中 RunLoop 的内部实现细节，帮助你更好地理解这一机制。</ p >
2222< h2 id ="什么是-Even-Loop "> < a href ="#什么是-Even-Loop " class ="headerlink " title ="什么是 Even Loop "> </ a > 什么是 Even Loop</ h2 > < p > 在讨论 RunLoop 之前，先了解一下线程的基本概念。通常，线程执行完一个任务后就会退出，要重新执行任务只能再创建一个新线程。但如果我们希望线程在处理完任务后不退出，而是等待并处理新的任务，就需要一种机制来保持线程的活动状态，这就是 < a target ="_blank " rel ="noopener " href ="https://en.wikipedia.org/wiki/Event_loop "> Even Loop</ a > （事件循环）。</ p >
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