Qt获取本地ip地址

Qt提供相关获取ip地址的类，可以十分方便获取本机ip地址。

QString MainWindow::read_ip_address()
{
    QString ip_address;
    QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
    for (int i = 0; i < ipAddressesList.size(); ++i)
    {
        if (ipAddressesList.at(i) != QHostAddress::LocalHost &&  ipAddressesList.at(i).toIPv4Address())
        {
            ip_address = ipAddressesList.at(i).toString();
            qDebug()<<ip_address;  //debug
            //break;
        }
    }
    if (ip_address.isEmpty())
        ip_address = QHostAddress(QHostAddress::LocalHost).toString();
    return ip_address;
}