Qt的正则匹配

if (!file.open(QIODevice::ReadOnly))
    {
        qDebug()<<"readIniComment open"<<fileName<<"failed!: error"<<file.error();

    } else {
        qDebug() << "file opened!";
    }

    QTextStream inStream(&file);
    inStream.setCodec("UTF-8");
    QString data = inStream.readAll();

    QRegExp regExpString(QString("\\[%1\\]\\s*KeyboardLayoutList=([^\n]*)").arg(username));
    int pos = data.indexOf(regExpString);
    if (pos > -1) {
        QString tmpRegExpString = regExpString.cap(0);
        QString str = tmpRegExpString.section("=", 1, 1);

        QStringList originkeyboardList = str.split(";");

        for (int j = 0; j < originkeyboardList.length(); j++) {
            if (!originkeyboardList[j].isEmpty()) {
                keyboardLayoutFiltered << originkeyboardList[j];
            }
        }

    }