Qt获取本机IP地址和名称

在学习Qt，想尝试一下用Qt获取IP地址和名称，代码如下：

QLabel *label = new QLabel(this);
    QString localName = QHostInfo::localHostName();

    label->setGeometry(QRect(50,50,200,40));
    label->setText("PC-Name: "+localName);

    QLabel *label_IP = new QLabel(this);
    label_IP->setGeometry(QRect(50,100,200,40));
    QHostInfo info = QHostInfo::fromName(localName);
    //遍历地址获取IPV4地址
    foreach(QHostAddress address,info.addresses())
    {
        if(address.protocol()==QAbstractSocket::IPv4Protocol)
        {
            label_IP->setText("IP: "+address.toString());
        }
    }

需添加头文件如下：

#include <QtNetwork/QHostInfo>
#include <QLabel>

运行结果

刚开始运行出错缺少运行