超简单的套接字使用

#include <QtNetwork>
QUdpSocket *sender;
sender = new QUdpSocket(this);

QByteArray datagram = “hello------------world!”;

//UDP广播
sender->writeDatagram(datagram.data(),datagram.size(),QHostAddress::Broadcast,6665);

//向特定IP发送
QHostAddress serverAddress = QHostAddress("10.21.11.66");
sender->writeDatagram(datagram.data(), datagram.size(),serverAddress, 6665);

/* writeDatagram函数原型，发送成功返回字节数，否则-1
qint64 writeDatagram(const char *data,qint64 size,const QHostAddress &address,quint16 port)
qint64 writeDatagram(const QByteArray &datagram,const QHostAddress &host,quint16 port)
*/







//控制台

#include <QtNetwork>
QUdpSocket *receiver;

//信号槽