Qt打开文件夹

注意一定要用斜杠，用反斜杠和双反斜杠都打开失败

QPushButton* openPath = new QPushButton(ui->treeWidget_2);
　　openPath->setToolTip(path);
　　openPath->setText("打开路径");
　　QObject::connect(openPath, &QPushButton::clicked, [=](){
　　　　QDesktopServices::openUrl(QUrl("D:/Work/QtSpace/QualityCheck/cfg"));
});