qt入门，Qt 是一个跨平台的C++应用程序框架，支持Windows、Linux、Mac OS X、Android、iOS、Windows Phone、嵌入式系统等。也就是说，Qt 可以同时支持桌面应用程序开发、嵌入式开发和移动开发，覆盖了现有的所有主流平台。你只需要编写一次代码，发布到不同平台前重新编译即可(Qt is a cross-platform C ++ application framework that supports Windows, Linux, Mac OS X, Android, iOS, Windows Phone, and embedded systems. In other words, Qt can support both desktop application development, embedded development and mobile development, covering all existing mainstream platforms. You only need to write a code, published to different platforms can be re-compiled before)