QT UDP SOCKET编程.doc

QT建立控制台项目,还是用最简单的c/s 模式.
client端:

 
#ifndef UDP_UDPclient_H
#define UDP_UDPclient_H
#include <work/QUdpSocket>
#include <QHostAddress>
#include <QThread>
#pragma once
 
class UDPclient: public QObject
{
  Q_OBJECT 
public:
 void InitSocket();
private slots:
    void Recv();
};
#endif

 
#include ""
QUdpSocket  *udpSocket;   //套接字对象
void UDPclient::InitSocket()
{
  udpSocket = new QUdpSocket(this);
  udpSocket->bind(QHostAddress::Any,2002);
  connect(udpSocket, SIGNAL
(readyRead()),
   this, SLOT(Recv()));
}
void UDPclient::Recv()
{
  while (udpSocket->hasPendingDatagrams())
 {
        QByteArray datagram;
        (udpSocket->pendingDatagramSize());
        udpSocket->readDatagram((), ());                            
  for (int i = 0; i < (); ++i)
  {
   printf( " %x",(i));
  }
  printf("\n");
    }
}
函数解释:pendingDatagramSize  当有数据包读入时返回true.
         resize 为datageam设置大小
         pendingDatagramSize 返回udosocket第一个数据包的大小
         readDatagram 读数据包
 
server端,顺便学****写下个多进程QThread:

 
#include <QtGui/QApplication>
#include ""
int main(int argc, char *argv[])
{  
 UDP_QT Server;
 QCoreApplication a(argc, argv);
 ();
 ();//进程开始
    return ();
}

 
#ifndef UDP_QT_H