qt中udp和tcp的通信流程API
时间: 2023-08-13 11:08:14 浏览: 117
在Qt中进行UDP和TCP通信的流程和API如下:
UDP通信流程:
1. 创建QUdpSocket对象
2. 绑定本地IP地址和端口号
3. 发送数据:使用QHostAddress和quint16参数创建目标地址,使用QUdpSocket的writeDatagram()函数发送数据
4. 接收数据:使用QUdpSocket的readyRead()信号和readDatagram()函数接收数据
UDP通信API:
1. 创建QUdpSocket对象:QUdpSocket *udpSocket = new QUdpSocket(this);
2. 绑定本地IP地址和端口号:udpSocket->bind(QHostAddress::AnyIPv4, port);
3. 发送数据:udpSocket->writeDatagram(data, QHostAddress(targetIP), targetPort);
4. 接收数据:connect(udpSocket, &QUdpSocket::readyRead, this, &MyClass::processPendingDatagrams);
void MyClass::processPendingDatagrams()
{
while (udpSocket->hasPendingDatagrams()) {
QByteArray datagram;
datagram.resize(udpSocket->pendingDatagramSize());
udpSocket->readDatagram(datagram.data(), datagram.size());
// 处理接收到的数据
}
}
TCP通信流程:
1. 创建QTcpServer对象
2. 监听端口号:使用QTcpServer的listen()函数监听端口号
3. 接受连接:使用QTcpServer的newConnection()信号和nextPendingConnection()函数接受连接请求,创建QTcpSocket对象
4. 发送数据:使用QTcpSocket的write()函数发送数据
5. 接收数据:使用QTcpSocket的readyRead()信号和read()函数接收数据
TCP通信API:
1. 创建QTcpServer对象:QTcpServer *tcpServer = new QTcpServer(this);
2. 监听端口号:tcpServer->listen(QHostAddress::AnyIPv4, port);
3. 接受连接:
connect(tcpServer, &QTcpServer::newConnection, this, &MyClass::processNewConnection);
void MyClass::processNewConnection()
{
QTcpSocket *clientSocket = tcpServer->nextPendingConnection();
connect(clientSocket, &QTcpSocket::readyRead, this, &MyClass::processReadyRead);
}
4. 发送数据:clientSocket->write(data);
5. 接收数据:
void MyClass::processReadyRead()
{
QTcpSocket *clientSocket = qobject_cast<QTcpSocket *>(sender());
QByteArray data = clientSocket->readAll();
// 处理接收到的数据
}