初始化菜单和菜单项 m_menu = new QMenuui-tw_process; m_actionReRecord = new QAction重选录制 this; m_actionDeleteSelected = new QAction删除选中 this; m_actionSelectOnlyThis = new QAction只选这个 this; m_actio

需要在CustomContextMenuRequested信号的槽函数中显示菜单，代码如下：

connect(ui->tw_process, &QTreeWidget::customContextMenuRequested, this, &MainWindow::onCustomContextMenuRequested);

// ...

void MainWindow::onCustomContextMenuRequested(const QPoint &pos) { QModelIndex index = ui->tw_process->indexAt(pos); if (index.isValid()) { m_menu->exec(ui->tw_process->viewport()->mapToGlobal(pos)); } }

其中，QModelIndex index = ui->tw_process->indexAt(pos)用于获取右键位置对应的节点的索引，如果索引有效，就显示菜单。