qt 取得ipv4的值

    QHostInfo hostinfo = QHostInfo::fromName(QHostInfo::localHostName());

    QList<QHostAddress> addressList = hostinfo.addresses();

    QString ip = "0.0.0.0";

    if (!addressList.isEmpty())

    {

        for(int i = 0; i < addressList.size(); i++)

        {

            QHostAddress add = addressList.at(i);

            if (QAbstractSocket::IPv4Protocol == add.protocol())

            {

                ip = add.toString();

                break;

            }

        }

    }

    return ip;