QT制作UDP通讯小软件

1，主界面

2，代码部分

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include    

 
 
QString MainWindow::getLocalIP()
{
    QString hostName=QHostInfo::localHostName();//本地主机名

    QHostInfo   hostInfo=QHostInfo::fromName(hostName);
    QString   localIP="";
 
    QList addList=hostInfo.addresses();//

 
    if (!addList.isEmpty())
    for (int i=0;icount();i++)

    {
        QHostAddress aHost=addList.at(i);
        if (QAbstractSocket::IPv4Protocol==aHost.protocol())
        {
            localIP=aHost.toString();
            break;
        }
    }
    return localIP;
}
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    LabSocketState=new QLabel("Socket状态：");//

    LabSocketState->setMinimumWidth(200);
    ui->statusBar->addWidget(LabSocketState);
 
    QString localIP=getLocalIP();//本机IP

    this->setWindowTitle(this->windowTitle()+"----本机IP："+localIP);
    ui->comboTargetIP->addItem(localIP);
 
    udpSocket=new QUdpSocket(this);//用于与连接的客户端通讯的QTcpSocket

 
    connect(udpSocket,SIGNAL(stateChanged(QAbstractSocket::SocketState)),
            this,SLOT(onSocketStateChange(QAbstractSocket::SocketState)));
    onSocketStateChange(udpSocket->state());
 
    connect(udpSocket,SIGNAL(readyRead()),
            this,SLOT(onSocketReadyRead()));
}
 
MainWindow::~MainWindow()
{
    udpSocket->abort();
    delete udpSocket;
    delete ui;
}
 
void MainWindow::onSocketStateChange(QAbstractSocket::SocketState socketState)
{
    switch(socketState)
    {
    case QAbstractSocket::UnconnectedState:
        LabSocketState->setText("scoket状态：UnconnectedState");
        break;
    case QAbstractSocket::HostLookupState:
        LabSocketState->setText("scoket状态：HostLookupState");
        break;
    case QAbstractSocket::ConnectingState:
        LabSocketState->setText("scoket状态：ConnectingState");
        break;
 
    case QAbstractSocket::ConnectedState:
        LabSocketState->setText("scoket状态：ConnectedState");
        break;
 
    case QAbstractSocket::BoundState:
        LabSocketState->setText("scoket状态：BoundState");
        break;
 
    case QAbstractSocket::ClosingState:
        LabSocketState->setText("scoket状态：ClosingState");

                                                        
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