基于QT的UDP协议的通信
#————————————————-## Project created by QtCreator 2014-05-22T21:39:26##————————————————-QT+= core guiQT += networkgreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsTARGET = udpchatTEMPLATE = appSOURCES += main.cpp\dialog.cppHEADERS += dialog.h#ifndef DIALOG_H#define DIALOG_H#include <QDialog>#include <QLabel>#include <QPushButton>#include <QLineEdit>#include <QUdpSocket>class Dialog : public QDialog{Q_OBJECTpublic:Dialog(QWidget *parent = 0);~Dialog();private:QLabel *label1, *label2, *label3, *label4;QLineEdit *edit1, *edit2, *edit3, *edit4;QPushButton *btn1, *btn2;QUdpSocket *udpsocket;private slots:void on_clicked1();void on_clicked2();void dataReceived();};#endif // DIALOG_H#include "dialog.h"#include <QMessageBox>#include <QVBoxLayout>#include <QGridLayout>#include <QByteArray>#include <QHostAddress>Dialog::Dialog(QWidget *parent): QDialog(parent){udpsocket = new QUdpSocket(this);setWindowTitle(tr("udp聊天"));//设置窗口标题label1 = new QLabel;label1->setText(tr("请输入bind端口号"));label2 = new QLabel;label2->setText(tr("请输入目的IP地址"));label3 = new QLabel;label3->setText(tr("请输入目的端口号"));label4 = new QLabel;label4->setText(tr("请输入发送消息"));edit1 = new QLineEdit;edit2 = new QLineEdit;edit3 = new QLineEdit;edit4 = new QLineEdit;btn1 = new QPushButton;btn1->setText(tr("bind"));//设置btn1标题btn2 = new QPushButton;btn2->setText(tr("发送"));//设置btn2标题QGridLayout *layout1 = new QGridLayout(this);layout1->addWidget(label1, 0, 0);//加入label1控件layout1->addWidget(edit1, 0, 1);//加入edit1控件layout1->addWidget(btn1, 1, 0);//加入btn1控件layout1->addWidget(label2, 2, 0);//加入label2控件layout1->addWidget(edit2, 2, 1);//加入edit2控件layout1->addWidget(label3, 3, 0);//加入label3控件layout1->addWidget(edit3, 3, 1);//加入label3控件layout1->addWidget(label4, 4, 0);//加入label4控件layout1->addWidget(edit4, 4, 1);//加入label4控件layout1->addWidget(btn2, 5, 0);//加入btn2控件connect(btn1, SIGNAL(clicked()), this, SLOT(on_clicked1()));connect(btn2, SIGNAL(clicked()), this, SLOT(on_clicked2()));connect(udpsocket, SIGNAL(readyRead()), this, SLOT(dataReceived()));}Dialog::~Dialog(){}void Dialog::on_clicked1(){udpsocket->close();udpsocket->bind(edit1->text().toInt());}void Dialog::on_clicked2(){QHostAddress addr;addr.setAddress(edit2->text());int port = edit3->text().toInt();udpsocket->writeDatagram(edit4->text().toUtf8(), addr, port);}void Dialog::dataReceived()//接收socket消息的槽函数{QHostAddress addr;char buf[1024];while(udpsocket->hasPendingDatagrams()){memset(buf, 0, sizeof(buf));udpsocket->readDatagram(buf, sizeof(buf), &addr);QMessageBox::information(this, tr("消息"), tr("来自") + addr.toString() + tr("的消息:\n") + buf);}}
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