How Connect signal slot correctly?

[isan]

I Connect signal and slot like this and I get this error (QObject::connect: No such slot) when run it , How can I fix it?

.h:

class RandomWalk : public QThread {
  Q_OBJECT
public:
  typedef void DataHandler(void *param, double elapsedTime, double series0,
                           double series1);

  RandomWalk(DataHandler *handler, void *param);
  virtual ~RandomWalk();


private:
  // Disable copying and assignment
  RandomWalk &operator=(const RandomWalk &);
  RandomWalk(const RandomWalk &);

  QSerialPort *serial;
};

.cpp:

RandomWalk::RandomWalk(RandomWalk::DataHandler *handler, void *param)
    : stopThread(false), handler(handler), param(param) {
  serial = new QSerialPort(this);
  connect(serial, SIGNAL(readyRead()), this, SLOT(readData()));
}

[eyllanesc]

@isan Where is readData defined? Also use connect(serial, &QSerialPort::readyRead, this, &RandomWalk::readData);

[Christian Ehrlicher]

Apart from @eyllanesc comments - you're using QThread wrong and for no reason - QSerialPort is async anyway without the need for a separate thread.

[BDC_Patrick]

as @eyllanesc mentioned..
you need to define your slot in the header first.
means:

private slots:
void readData();

And do the functionality in the source file.