qt 中使用正則表達式去除匹配到的內容

    string strMsg = "MainWindow::createMeasurePage(): dvctype=DvcMisc,cmd=WELCM,logonuser=adf";
    QTextCodec * codec = QTextCodec::codecForName("UTF-8");
    QString qstr = codec->toUnicode(strMsg.c_str(), strMsg.length());

    QString strRx("^[a-zA-Z][a-zA-Z0-9_]*::[a-zA-Z][a-zA-Z0-9_]*\\(\\):\\s");
    QRegExp rxlen(strRx);
    int pos = rxlen.indexIn(qstr);
    if (pos > -1) {
        QString value = rxlen.cap(0); //
        QString unit = rxlen.cap(1);  //
        qDebug() << value << unit << pos <<"match over";
    }
    //*/
   // QString strTmp = "MainWindow::createMeasurePage(): dvctype=DvcMisc,cmd=WELCM,logonuser=adf";
    qstr.replace(rxlen, "");
    qDebug() << qstr << "return" << endl;