qt(对话框 QMessageBox)

//        QMessageBox::information(this,"消息框","文件已经打开!",QMessageBox::Ok,QMessageBox::NoButton);
//        QMessageBox::warning(this,"信息对话框","你到底有问题没");
        auto result = QMessageBox::question(this,"询问对话框","文件是否已经修改",QMessageBox::Save,QMessageBox::No);
        if(result  == QMessageBox::Save)
            qDebug()<<"点击的是save";
        else if(result == QMessageBox::No)
            qDebug()<<"点击的是No";