狼人杀计时器，发言计时，流程计时
狼人杀计时器，发言计时，狼人杀游戏时间预估。
在工作日有限的休息时间内，控制每个人发言时间，把控游戏进度，从而在休息时间结束时结束游戏。
将手机投影在大屏幕上，倒计时会有 滴答 滴答 滴答的声音。 有需要还可以在夜晚播放背景音乐。
1个每秒执行1次的计时器 + 一个单例数据模型
DispatchSourceTimer创建最后10秒的滴答音效
因为每秒播放一次一个不足1秒的 m4a 文件
用 AudioServicesCreateSystemSoundID 播放再合适不过（最开始用AVPlayer和AVAudioPlayer没放出来。。。推测是内存消耗比较大，每秒执行就会出现一些问题）
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
Django
The Web framework for perfectionists with deadlines.
Laravel
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft
Open source projects and samples from Microsoft.
Google
Google ❤️ Open Source for everyone.
Alibaba
Alibaba Open Source for everyone
D3
Data-Driven Documents codes.
Tencent
China tencent open source team.