Qt tcp传输简单使用

pro添加模块与includ头文件

QT += network

#include <QList>
#include <QTcpSocket>
#include <QTcpServer>
#include <QNetworkInterface>

client端

socket = new QTcpSocket;
socket -> connectToHost(serverIP, 8888);
connect(socket, SIGNAL(connected()), this, SLOT(connectedSlot()));
connect(socket, SIGNAL(readyRead()), this, SLOT(readyReadSlot()));
connect(socket, SIGNAL(disconnected()), this, SLOT(disconnectedSlot()));
connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(errorSlot(QAbstractSocket::SocketError)));

socket -> write(data);

qDebug() << socket -> errorString();
qDebug() << socketError;

server端

server = new QTcpServer;
connect(server, SIGNAL(newConnection()), this, SLOT(newConnectionSlot()));
bool ok = server -> listen(QHostAddress::Any, 8888);
qDebug() << "listen: " << ok;

void SyncFileServer::newConnectionSlot()
{
    QTcpSocket* socket = server -> nextPendingConnection();
    socketList.append(socket);
    qDebug() << "new connectd: " << socket;

    connect(socket, SIGNAL(connected()), this, SLOT(connectedSlot()));
    connect(socket, SIGNAL(readyRead()), this, SLOT(readyReadSlot()));
    connect(socket, SIGNAL(disconnected()), this, SLOT(disconnectedSlot()));
    connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(errorSlot(QAbstractSocket::SocketError)));
}

QTcpSocket* s = qobject_cast<QTcpSocket*>(this -> sender());
while (!s -> atEnd())
{
    QByteArray lineData = s -> readLine();
    // ...
}

QTcpSocket* s = qobject_cast<QTcpSocket*>(this -> sender());
socketList.removeAll(s); 

socketList.clear();