说明：  QT学习电子书，包括QT学习的基础知识，QT部件熟悉，QT应用程序开发介绍等，还有QT Designer学习的详细介绍，是QT学都不可多得的资料
(QT learning e-books, including the basic knowledge QT study, QT familiar components, QT introduced, such as application development, as well as the QT Designer detailed study is QT study data are rare)