如何在Qt中Qtextedit的标准菜单上方插入项目

QMenu* menu = new QMenu(this);

QAction* action1 = new QAction("项目1", this);
QAction* action2 = new QAction("项目2", this);
menu->addAction(action1);
menu->addAction(action2);

QMenu* standardMenu = textEdit->createStandardContextMenu();
standardMenu->insertMenu(standardMenu->actions().first(), menu);
textEdit->setContextMenuPolicy(Qt::CustomContextMenu);
textEdit->setContextMenuPolicy(Qt::ActionsContextMenu);
textEdit->addActions(standardMenu->actions());