Question

QT treewideget怎么实现显示一个文件及文件夹里面的子文件夹

显示的每个的子文件夹里面有2个txt文件

Answer 1

这个可以使用QTreeview和QFileSystemModel：官方文档例子如下：

It is simple to construct a tree view displaying data from a model. In the following example, the contents of a directory are supplied by a QFileSystemModel and displayed as a tree:
QFileSystemModel *model = new QFileSystemModel;
model->setRootPath(QDir::currentPath());
QTreeView *tree = new QTreeView(splitter);
tree->setModel(model);

如果要使用QTreeWidget 就要使用QFileInfo对文件夹进行遍历，挨个添加到QTreeWidget中。有关QFileInfo请参考帮助文档：http://qt-project.org/doc/qt-4.8/qfileinfo.html