说明：  学习，使用Qt已经将近两年了，最开始的时候用Qt3，后来升级到Qt4.1，自认为对Qt的GUI编程部分还是很熟悉的。遗憾的是Qt的参考书少之又少，一般就是看文档和C++ GUI Programming with Qt 3，这本书是免费提供的
(Study, using Qt for nearly two years, most beginning with Qt3, then upgrade to Qt4.1, since that part of the Qt' s GUI programming is still very familiar. Unfortunately, very few reference books Qt in general is to see documentation and C++ GUI Programming with Qt 3, this book is provided free of charge)