1. WebSocket
    https://www.cnblogs.com/jingmoxukong/p/7755643.html

  2. HTTPS
    https://blog.csdn.net/zxh2075/article/details/80738583
    https://www.cnblogs.com/zhangsanfeng/p/9125732.html

  3. 线程间通信、同步方式+进程间通信方式
    https://blog.csdn.net/qq_32621445/article/details/78635951

  4. iOS设计模式
    https://www.jianshu.com/p/e5c69c7b8c00
    https://www.cnblogs.com/wangbinios/p/7882082.html
    https://blog.csdn.net/shihuboke/article/details/72817169