QMessageBox

    QMessageBox msgbox;

    msgbox.setWindowTitle("Warning");

    msgbox.setText("you will remove all information Are you sure?");

    msgbox.setStandardButtons(QMessageBox::Cancel|QMessageBox::Ok);

    msgbox.setButtonText(QMessageBox::Cancel,"Cancel");

    msgbox.setButtonText(QMessageBox::Ok,"OK");

    int ret = msgbox.exec();

    switch (ret) {

    case QMessageBox::Ok:

        //删除

        m_model->remove(index);

        break;

    case QMessageBox::Cancel:

        //

        return ;

    default:

        break;

    }