pDialog->addSeparator();
    QAction *pmb2 = pDialog->addAction(QString::fromLocal8Bit("选择对话框"));
    connect(pmb2, &QAction::triggered,
        [this](){
            QMessageBox * mBox = new QMessageBox(this);
            mBox->setWindowTitle(QString::fromLocal8Bit("中文选择对话框标题"));
            mBox->setText(QString::fromLocal8Bit("中文选择对话框内容"));
            mBox->setStandardButtons(QMessageBox::StandardButton::Ok | QMessageBox::StandardButton::Cancel);
            mBox->setButtonText(QMessageBox::StandardButton::Ok, QString::fromLocal8Bit("确定"));
            mBox->setButtonText(QMessageBox::StandardButton::Cancel, QString::fromLocal8Bit("取消"));
            mBox->exec();
            QMessageBox::StandardButton ret = mBox->standardButton(mBox->clickedButton());
            switch (ret)
            {
            case QMessageBox::NoButton:
                qDebug() << QString::fromLocal8Bit("没有选择").toStdString().c_str();
                break;
            case QMessageBox::Ok:
                qDebug() << QString::fromLocal8Bit("确定").toStdString().c_str();
                break;
            case QMessageBox::Cancel:
                qDebug() << QString::fromLocal8Bit("取消").toStdString().c_str();
                break;
            default:
                break;
            }
            if (mBox != nullptr)
            {
                delete mBox;
                mBox = nullptr;
            }
        });

确定
取消
取消