qt获取本机ip

//获取本机IP
QString getIP(QString localHost)
{
    QString ipAddr;
#if 0
    QList<QHostAddress> AddressList = QNetworkInterface::allAddresses();
    foreach(QHostAddress address, AddressList){
        if(address.protocol() == QAbstractSocket::IPv4Protocol &&
                address != QHostAddress::Null &&
                address != QHostAddress::LocalHost){
            if (address.toString().contains("127.0.")){
                continue;
            }
            ipAddr = address.toString();
            break;
        }
    }
#else
    QHostInfo info = QHostInfo::fromName(localHost);
    info.addresses();//QHostInfo的address函数获取本机ip地址
    //如果存在多条ip地址ipv4和ipv6：
    foreach(QHostAddress address,info.addresses())
    {
        if(address.protocol()==QAbstractSocket::IPv4Protocol){//只取ipv4协议的地址
            qDebug()<<address.toString();
            ipAddr = address.toString();
        }
    }
#endif
    return ipAddr;
}