如何在不同的线程中执行 QTcpSocket?

IMO, putting your IO, including QTcpSocket in a thread other than the main thread is a best practice and must-do for any performant application. I use QTcpSocket in non-main threads all the time using the following idiom:

// Read data from a QTcpSocket in a thread. Assumes this is in some class.
m_thread = std::thread([this]
{
    QEventLoop eventLoop;
    QTcpSocket* socket = new QTcpSocket(&eventLoop);

    socket->connectToHost("localhost", 9999);

    // enqueue or process the data
    QObject::connect(socket, &QTcpSocket::readyRead, &eventLoop, [socket]
    {

        m_concurrentQueue.push_back(socket->readAll());
    });

    // Quit the loop (and thread) if the socket it disconnected. You could also try
    // reconnecting
    QObject::connect(socket, &QTcpSocket::disconnected, &eventLoop, [&eventLoop]
    {
        eventLoop.quit();
    });

    eventLoop.exec();

    delete socket;
});

其中 m_thread 是某个成员线程(基本上只是确保它的生命周期大于当前的直接作用域)，而 m_concurrentQueue 是某个线程安全队列，或者std 具有互斥保护的容器.