QThread工作类发出的信号不会到达

class MyCustomObject {
};

class DeviceConnection : public QObject {
    Q_OBJECT

    public:
        explicit DeviceConnection(QObject* const parent = nullptr);

    signals:
        void readFinished(MyCustomObject result);

    public slots:
        void readFromDevice();
};

DeviceConnection::readFromDevice() {
    /* ... */
    emit readFinished(MyCustomObject());
}

void MainWindow::on_actionRead_triggered() {
    QThread* const thread = new QThread(this);
    DeviceConnection* const connection = new DeviceConnection();
    connection->moveToThread(thread);
    thread->start();

    connect(connection, &DeviceConnection::readFinished, this, [=](MyCustomObject data) {
        /* This never runs. */
        connection->deleteLater();
        thread->quit();
    });

    QTimer::singleShot(0, connection, &DeviceConnection::readFromDevice);
}

开始读起来还不错。我可以在调试器中看到我正在到达 emit 线,我就要到了。但是我也可以在调试器和代码的行为中看到 readFinished

Edit:当我不使用额外的线程时,这个代码运行得很好,但是当然它会在运行时阻塞主线程 readFromDevice()