如何使用GCD定期在后台运行代码块？ [英] How can I run code block in background periodically using GCD?

问题描述

如何使用GCD定期在后台运行代码块？
我正在尝试用几个子系统编写一个游戏引擎，比如渲染，物理，游戏逻辑等等。有些任务应该是事件驱动的，但是有些任务（比如物理系统）应该在后台以恒定时间周期性地调用（例如在1/100秒之后）。
我创建了一个代码块，但是如何在后台定期运行此块？这里是GCD正确的工具吗？

How can I run code block in background periodically using GCD? I am trying to write a game engine with several subsystems, like rendering, physics, game logic and so on. Some tasks should be event-driven, but some (like physics system) should be called periodically in the background with constant time (for example after 1/100 sec). I created a block of code, but how can I run this block periodically in background? Is GCD right tool here?

推荐答案

你想要的是一个GCD调度源。有关示例代码，请参阅创建计时器示例。

What you want is a GCD dispatch source. For sample code, see the Creating a Timer Example.

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