QThreads - Why allocate memory inside a constructor rather than having a normal class member?

Question

http://doc.qt.io/qt-5/qthread.html

class Controller : public QObject
{
    Q_OBJECT
    QThread workerThread;
public:
    Controller() {
        Worker *worker = new Worker;
        worker->moveToThread(&workerThread);
        connect(&workerThread, &QThread::finished, worker, &QObject::deleteLater);
        connect(this, &Controller::operate, worker, &Worker::doWork);
        connect(worker, &Worker::resultReady, this, &Controller::handleResults);
        workerThread.start();
    }

My way:

class Controller: public QObject
{
    Q_OBJECT
public:
    Worker  objWorker;
    QThread objQThread;

    Controller();
    ~Controller();

public slots:
    void receiveImage();
};

and

Controller::Controller()
{
    objWorker.moveToThread( &objQThread );

    connect( &objWorker, &Worker::imageReady, this, &Controller::receiveImage );

    objQThread.start();
}

Is their method better than mine in some way? Which should be preferred in which case?

Answer 1

From: http://doc.qt.io/qt-5/qthread.html

From Qt 4.8 onwards, it is possible to deallocate objects that live in a thread that has just ended, by connecting the finished() signal to QObject::deleteLater().

This can be achieved only by making a pointer object of the Worker class and allocating memory to it.