Qt中树形结构显示目录结构

void LoadFiles(QString path, QTreeWidget *treewidget, QTreeWidgetItem *item)
{
QDir dir(path);
if (!dir.exists()) return;

dir.setFilter(QDir::Dirs | QDir::Files | QDir::NoSymLinks);
QFileInfoList list = dir.entryInfoList();
int size = list.size();
for (int i = 0; i < size; i++) {
QFileInfo info = list.at(i);
if (info.fileName() == "." || info.fileName() == "..") continue;

if (info.isDir()) {
QTreeWidgetItem *fileItem = new QTreeWidgetItem(QStringList() << info.fileName(), 0);  //0表示目录
if (treewidget == NULL) item->addChild(fileItem);
else treewidget->addTopLevelItem(fileItem);
LoadFiles(info.filePath(), NULL, fileItem);
} else {
QTreeWidgetItem *fileItem = new QTreeWidgetItem(QStringList() << info.fileName(), 1);   //1表示是文件
if (treewidget == NULL) item->addChild(fileItem);
else treewidget->addTopLevelItem(fileItem);
}
}
}

QDirModel *model = new QDirModel();
ui.treeView->setModel(model);
ui.treeView->setRootIndex(model->index("c:/"));