本文共 1771 字，大约阅读时间需要 5 分钟。
一、服务器
1、声明一个QTcpServer对象
QTcpServer* serverListener;
2、new出对象
this->serverListener = new QTcpServer();
3、服务器监听
QHostAddress ipAddress(“192.168.1.1”);
quint16 ipPort = 8080;
serverListener->listen(ipAddress,ipPort);
4、声明一个QList对象用于存客户端
QList<QTcpSocket*> clientList;
5、连接信号与槽
QObject::connect(this->serverListener,SIGNAL(newConnection()),this,SLOT(newConnection()));//newConnection是自定义槽函数,用于管理clientList列表
6、实现newConnection函数，保存客户端至clientList
void TcpServer::newConnection()
{
QTcpSocket* serverClient = this->serverListener->nextPendingConnection();//new出客户端对象
this->clientList.append(serverClient);//保存
QObject::connect(serverClient,SIGNAL(readyRead()),this,SLOT(rcvData()));//当此客户端有数据时在自定义rcvData函数里接收
QObject::connect(serverClient,SIGNAL(disconnected()),this,SLOT(removeClient()));//当此客户端断开连接时,会发出disconnected信号，在自定义removeClient里去除客户端
}
7、实现removeClient函数，去除客户端
void TcpServer::removeClient()
{
for(int i=0;i<this->clientList.length();i++)
{
if(clientList.at(i)->socketDescriptor() == -1)//用于判断当前客户端是否有效
clientList.removeAt(i);
}
}
8、实现rcvData函数，接收数据
void TcpServer::rcvData()
{
QByteArray ba;
for(int i=0;i<this->clientList.length();i++) { if(clientList.at(i)->atEnd() == true) continue; ba = clientList.at(i)->readAll();//
}}
9、发送数据
clientList.at(n)->write(QByteArray ba);
10、停止
serverListener->close();
二、客户端
1、声明一个QTcpSocket对象
QTcpSocket* tcpClient;
2、new出对象
this->tcpClient = new QTcpSocket();
3、连接服务器,连接信号与槽
tcpClient->connectToHost("192.168.1.1","8080");
QObject::connect(this->tcpClient,SIGNAL(readyRead()),this,SLOT(rcvData()));//rcvData是自定义接收槽函数
4、实现rcvData函数，接收数据
void TcpClient::rcvData()
{
QByteArray ba = tcpClient->readAll();
}
5、发送数据
tcpClient->write(QByteArray ba);
6、关闭
tcpClient->close();
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