how to stop thread while thread is running?

I have a Class DeviceManager:

Code:

---

DeviceManager(QObject *parent) :
    QObject(parent)
{
    thread = new QThread();
    this->moveToThread(thread);
    connect(thread, SIGNAL(started()), this, SLOT(autoDetect()));
    thread->start();
}
 
void autoDetect()
{
    ...
    emit addDevice();
    ... 
}

---

Class MainForm:

Code:

---

MainForm(QObject *parent) :
    QObject(parent)
{
    this->manager = new DeviceManager();
    connect(manager, SIGNAL(addDevice()), this, SLOT(slot()));
 
}
 
void refresh()
{
     this->manager->deleteLater();
     this->manager = new DeviceManager();
     connect(manager, SIGNAL(addDevice()), this, SLOT(slot()));
}

---

I have a problem is manager don't disconnect. When mainForm call refresh many time (eg: 3 times), then when slot() is executed 4 times.
I think that the older manager's connect is disconnect or object can't deleted.
I tried delete thread but I got message:

Quote:

---

QThread: Destroyed while thread is still running

---

How to stop thread while thread is still running?

For disconnect: QObject has also a function for disconnecting signals & slots
For thread: The thread has to leave the run() method. If you did not reimplement them, calling QThread::exit() should suffice. Then you must wait until the thread has finished - see QThread documentation