本文实例为大家分享了QTUDP实现简单消息传输的具体代码，供大家参考，具体内容如下这几天看了下Qt的udp，顺便实现了下简单的消息传输，看起来比较简单。UDP服务器：截图如下：代码：server.h...

本文实例为大家分享了QT UDP实现简单消息传输的具体代码，供大家参考，具体内容如下

这几天看了下Qt的udp，顺便实现了下简单的消息传输，看起来比较简单。

UDP服务器：

截图如下：

代码：

server.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include<QUdpSocket>
#include<QtNetwork>
#include<QLabel>
#include<QPushButton>
#include<QLineEdit>
#include<QGridLayout>
#include<QTimer>

class Widget : public QWidget
{
  Q_OBJECT

public:
  Widget(QWidget *parent = 0);
  ~Widget();
protected:
  QTimer* timer;
  QImage* image;
private slots:
  void send();
  void bordcaststart();
private:
  QPushButton* start_ptn;
  QPushButton* close_ptn;
  QPushButton* send_ptn;
  QLabel* label;
  QLineEdit* edit;
  QLabel* image_label;
  QGridLayout* layout;
  QUdpSocket* udpsocket;
};

#endif // WIDGET_H

server.cpp

#include "widget.h"

Widget::Widget(QWidget *parent)
  : QWidget(parent)
{
  start_ptn=new QPushButton("start");
  close_ptn=new QPushButton("quit");
  send_ptn=new QPushButton("send");
  label=new QLabel;
  label->setText("this is test!");
  edit=new QLineEdit;
  layout=new QGridLayout(this);
  layout->addwidget(label);
  layout->addWidget(edit);
  layout->addWidget(send_ptn,1,1);
  layout->addWidget(start_ptn,2,0);
  layout->addWidget(close_ptn,2,1);
  this->resize(400,400);

  timer=new QTimer(this);
  udpsocket=new QUdpSocket(this);
  connect(start_ptn,SIGNAL(clicked(bool)),this,SLOT(bordcaststart()));
  connect(close_ptn,SIGNAL(clicked(bool)),this,SLOT(close()));
//  connect(timer,SIGNAL(timeout()),this,SLOT(send()));
}

Widget::~Widget()
{

}

void Widget::send()
{

  QByteArray datagram= "Broadcast message " +edit->text().toUtf8();
  udpsocket->writeDatagram(datagram.data(),datagram.size(),QHostAddress::Broadcast,45454);
}

void Widget::bordcaststart()
{
 // timer->start(1000);
  start_ptn->setDisabled(true);
  connect(send_ptn,SIGNAL(clicked(bool)),this,SLOT(send()));
}

客户端

截图：

client.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include<QUdpSocket>
#include<QtNetwork>
#include<QLabel>
#include<QTimer>
#ijsnclude<QPushButton>
#include<QGridLayout>

class Widget : public QWidget
{
  Q_OBJECT

public:
  Widget(QWidget *parent = 0);
  ~Widget();
protected:

private:
  QGridLayout* layout;
  QPushButton* quit_ptn;
  QLabel* label;
  QUdpSocket* udpsocket;
private slots:
  void boarcast();
};

#endif // WIDGET_H

client.cpp

#include "widget.h"

Widget::Widget(QWidget *parent)
  : QWidget(parent)
{
  label=new QLabel;
  quit_ptn=new QPushButton("quit");

  layout=new QGridLayout(this);
  layout->addWidget(label);
  layout->addWidget(quit_ptn);
  this->resize(200,200);

  udpsocket=new QUdpSocket(this);
  udpsocket->bind(45454, QUdpSocket::ShareAddress);
  connect(udpsocket,SIGNAL(readyRead()),this,SLOT(boarcast()));
  connect(quit_ptn,SIGNAL(clicked(bool)),this,SLOT(close()));
}

Widget::~Widget()
{

}

void Widget::boarcast()
{
  while (udpsocket->hASPendingDatagrams()) {
      QByteArray datagram;
      datagram.resize(udpsocket->pendingDatagramSize());
      QHostAddress sender;
      quint16 senderPort;

      udpsocket->readDatagram(datagram.data(), datagram.size(),
                  &sender, &senderPort);

      label->setText(datagram);
  }
}

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