多线程运行的示例程序，实现了如何在见面上元素运行的时候，不会导致界面锁死。-a multi-thread sample code. the GUI will not stop responding during the app is processing other task

用C++编写底层代码，用objective –c 编写UI界面，实现有UI界面的串口通信工具。-Underlying code written in C++, using objective-c write GUI interface, implementation has UI interface serial communication tool.