The QHeaderView class provides a header row or header column for item views.
    QHeaderView类为项目视图提供标题行或标题列。

    A QHeaderView displays the headers used in item views such as the QTableView and QTreeView classes. It takes the place of Qt3’s QHeader class previously used for the same purpose, but uses the Qt’s model/view architecture for consistency with the item view classes.
    QHeaderView显示项目视图中使用的标题,比如QTableView和QTreeView类。它取代了Qt3的QHeader类,而QHeader类以前用于相同的目的,但是为了与项目视图类保持一致,它使用了Qt的模型/视图架构。