外部较好的学习主题

1、关于响应者链和事件传递
https://segmentfault.com/a/1190000015060603
2、深入理解runloop
https://blog.ibireme.com/2015/05/18/runloop/
3、BOOL 的探讨
https://juejin.im/post/5b42e125f265da0f5d4cb577
https://nshipster.cn/bool/
4、为什么block 用copy
https://blog.csdn.net/huanglinxiao/article/details/79490585
5、NSOrderedSet
https://nshipster.com/nsorderedset/
6、ios 和js 交互原理
https://zhuanlan.zhihu.com/p/31368159
7、class-dump的使用
https://blog.csdn.net/vbirdbest/article/details/53520889
8、shell 脚本编程入门
https://github.com/qinjx/30min_guides/blob/master/shell.md
9、代码混淆
https://blog.csdn.net/yiyaaixuexi/article/details/29201699