QT实现TCP通讯代码

好的，下面是在 Qt 中实现 TCP 通讯的一些示例代码：

1. 建立一个简单的 TCP 服务器：

#include <QTcpServer>
#include <QTcpSocket>
#include <QDebug>

int main(int argc, char *argv[])
{
    QTcpServer server;
    if (!server.listen(QHostAddress::Any, 1234)) {
        qDebug() << "Failed to start the server";
        return -1;
    }

    qDebug() << "Server is running on port" << server.serverPort();

    while (true) {
        if (server.waitForNewConnection(-1)) {
            QTcpSocket *client = server.nextPendingConnection();
            qDebug() << "New client connected:" << client->peerAddress().toString();

            while (client->waitForReadyRead(-1)) {
                QByteArray data = client->readAll();
                qDebug() << "Received data:" << data;

                client->write(data);
            }

            qDebug() << "Client disconnected:" << client->peerAddress().toString();
            delete client;
        }
    }

    return 0;
}

2. 建立一个简单的 TCP 客户端：

#include <QTcpSocket>
#include <QDebug>

int main(int argc, char *argv[])
{
    QTcpSocket socket;
    socket.connectToHost("127.0.0.1", 1234);
    if (!socket.waitForConnected(-1)) {
        qDebug() << "Failed to connect to the server";
        return -1;
    }

    qDebug() << "Connected to the server";

    socket.write("Hello, server!");
    if (!socket.waitForBytesWritten(-1)) {
        qDebug() << "Failed to write to the server";
        return -1;
    }

    qDebug() << "Data written to the server";

    if (!socket.waitForReadyRead(-1)) {
        qDebug() << "Failed to read from the server";
        return -1;
    }

    qDebug() << "Received data:" << socket.readAll();

    socket.disconnectFromHost();
    if (!socket.waitForDisconnected(-1)) {
        qDebug() << "Failed to disconnect from the server";
        return -1;
    }

    qDebug() << "Disconnected from the server";

    return 0;
}

这些代码是极其简单的示例，仅供参考。在实际应用中，你需要处理更多的细节，如错误处理、断开