判断QmessageBox点击的按钮

int r = QMessageBox::information(this, tr("提示"),

                                     tr("数值超出范围,是否保存修改?"),

                                     QObject::tr(("确认")) , QObject::tr(("取消")));

        if (r == QObject::tr(("确认")).toInt()) {

            writePara(GlobalVariables::selectWindow);

            this->close();

        }