QT socket相关

#include<QtNetwork/QTcpSocket>
#include<QtNetwork/QTcpServer>

1.服务器端

void About::init_tcp()
{
    //server
    this->tcpServer = new QTcpServer(this);
    this->tcpSocket = new QTcpSocket(this);
    if(!tcpServer->listen(QHostAddress::Any,6666))
   {
      qDebug()<<tcpServer->errorString();
      close();
      return;
    }
    connect(tcpServer,SIGNAL(newConnection()),this,SLOT(acceptConnection()));
}
void About::acceptConnection()

{
  tcpSocket = tcpServer->nextPendingConnection();
  qDebug() << "a client connect!!";
  connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(revData()));
}

void About::tcp_write(const char* data)
{
    tcpSocket->write(data);
}

2. 客户端，加入自动重连

void About::init_tcp()
{
    //client
    QString ip = getIP();
    this->tcpSocket = new QTcpSocket(this);
    tcpSocket->abort();
    tcpSocket->connectToHost(ip,6666);
    connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(revData()));

    connect(tcpSocket, SIGNAL(connected()), this, SLOT(OnSocketConnected()));
    connect(tcpSocket, SIGNAL(disconnected()), this, SLOT(OnSocketDisconnected()));
    connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(OnSocketError(QAbstractSocket::SocketError)));

    connect(&m_timer, SIGNAL(timeout()), this, SLOT(ConnectServer()));
    m_timer.setInterval(3000);
    m_timer.start();
}

QString About::getIP()
{
    QString local_ip;
    QString str;
    QList<QHostAddress> list = QNetworkInterface::allAddresses();
        foreach (QHostAddress address, list)
        {
            if(address.protocol() == QAbstractSocket::IPv4Protocol)
            {
                //IPv4地址
                if (address.toString().contains("127.0."))
                {
                    continue;
                }
                local_ip = address.toString();
            }
        }
        if (local_ip == "127.0.0.1")
        {
            qDebug() << "get local ip fail";
            return 0;
        }
        else
        {
            return local_ip;
        }
}

void About::OnSocketConnected()
{
    qDebug() << "connected to server";
    m_bServerConnected = true;
}

void About::OnSocketDisconnected()
{
    qDebug() <<"Server disconnected";
    m_bServerConnected = false;
}

void About::OnSocketError(QAbstractSocket::SocketError error)
{
    //emit ShowStatus(m_pTcpSocket->errorString());
    qDebug() << tcpSocket->errorString();
}

void About::ConnectServer()
{
    if(!m_bServerConnected)
    {
        QString ip = getIP();
        tcpSocket->connectToHost(ip, 6666);
        //m_pTcpSocket->waitForConnected(2000);//如果调用这句，界面会卡死
    }
}
void About::revData()
{
   //server
    QString datas = tcpSocket->readAll();
    qDebug()<<datas;
}
void About::tcp_write(const char* data)
{
    tcpSocket->write(data);
}