[Solved] Does anyone know how to solve this error I get in c++

[mshefiti]

So, the errors that I get are:

symbol(s) not found for architecture x86_64

linker command failed with exit code 1 (use -v to see invocation)

These 2 errors I get after I declare/define the setters and getters in myControllerFactory CLASS. The problem is not there if I only declare the slot cppButtonSlot(buttonId).
Here is the complete code so far related to my problem.

If anyone could help, would be really really really helpful.
I am a beginner in C++, so I may have stupid mistakes in the code.

Thank you all for your help.

MAIN.CPP

@//set current configuration and workflow here
QString currentConfiguration = "declipseSPECTgrouped";
int currentWorkflow = 3;

//set current configuration and workflow in C++
controllerFactory myController;
myController.setCurrentConfiguration(currentConfiguration);
myController.setCurrentWorkflow(currentWorkflow);
@

controllerFactory.h

@#ifndef CONTROLLERFACTORY_H
#define CONTROLLERFACTORY_H

//include here
#include <QString>
#include <QObject>
#include <QDebug>

class controllerFactory : public QObject
{
Q_OBJECT

public:
//contructor
controllerFactory();

//getters
QString getCurrentConfiguration();
int getCurrentWorkflow();

//setters
void setCurrentConfiguration(QString currentConfiguration);
void setCurrentWorkflow (int currentWorkflow);

public slots:
//slots
void cppButtonSlot(QString &buttonId);
void cppSliderSlot(QString &sliderId);
void cppLabelSlot(QString &labelId);
void cppSwitchSlot(QString &switchId);

private:
int _currentWorkflow;
QString _currentConfiguration;
};

#endif // CONTROLLERFACTORY_
@

controllerFactory.CPP

@#include "controllerFactory.h"

//constructor ---------------------------------------------------------
controllerFactory::controllerFactory()
{
}

//getters -------------------------------------------------------------
QString controllerFactory::getCurrentConfiguration()
{
return _currentConfiguration;
}

int controllerFactory::getCurrentWorkflow()
{
return _currentWorkflow;
}

//setters -------------------------------------------------------------
void controllerFactory::setCurrentConfiguration(QString currentConfiguration)
{
if (_currentConfiguration != currentConfiguration)
{
_currentConfiguration = currentConfiguration;
qDebug() << "Configuration set to " << _currentConfiguration;
}
}

void controllerFactory::setCurrentWorkflow (int currentWorkflow)
{
if (_currentWorkflow != currentWorkflow)
{
_currentWorkflow = currentWorkflow;
qDebug() << "Workflow changed to " << _currentWorkflow;
}
}

//slots ---------------------------------------------------------------
void controllerFactory::cppButtonSlot(QString &buttonId)
{
qDebug() << "cppButtonSlot received button ID: "<< buttonId;

//NEXT workflow button, neccessary to manually switch phases
if (buttonId == "nextWorkflowButton")
{
_currentWorkflow ++;
qDebug() << "Current Workflow: "<< _currentWorkflow;
}
}
@