Undefined reference to `vtable for MyClass'

[lytze]

Hello, I'm newbie, practicing qt code. I'm trying to call c++ function from qml. But I have a problem, maybe there are few mistakes from code.
with QT 5.2.0 on Ubuntu

Let's check;

I got these issues(3)

@
In function 'MyClass::MyClass()':
undefined reference to `vtable for MyClass'
home/oak/aeiou/myclass.cpp
collect2: error: Id returned 1 exit status
@

And here's my source codes

aeiou.pro
@

Add more folders to ship with the application, here

folder_01.source = qml/aeiou
folder_01.target = qml
DEPLOYMENTFOLDERS = folder_01

Additional import path used to resolve QML modules in Creator's code model

QML_IMPORT_PATH =

The .cpp file which was generated for your project. Feel free to hack it.

SOURCES += main.cpp
myclass.cpp

Installation path

target.path =

Please do not modify the following two lines. Required for deployment.

include(qtquick2applicationviewer/qtquick2applicationviewer.pri)
qtcAddDeployment()

HEADERS +=
myclass.h
@

myclass.h
@
#ifndef MYCLASS_H
#define MYCLASS_H
#include <QObject>

class MyClass : public QObject
{
Q_OBJECT

public:
MyClass();
void helloMethod(const QString &msg);
};

#endif // MYCLASS_H
@

main.cpp
@#include <QtGui/QGuiApplication>
#include "qtquick2applicationviewer.h"
#include <QtDebug>
#include <QQmlContext>
#include <myclass.h>

int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);

QtQuick2ApplicationViewer viewer;

viewer.rootContext()->setContextProperty("myObject",new MyClass);

viewer.setMainQmlFile(QStringLiteral("qml/aeiou/main.qml"));
viewer.showExpanded();
return app.exec();

}
@

myclass.cpp
@
#include <myclass.h>
#include <QDebug>

MyClass::MyClass(){
}

void MyClass::helloMethod(const QString &msg) {
qDebug() << "c++ method called " << msg;
}
@

main.qml
@
import QtQuick 2.0

Rectangle {
width: 100; height: 200
color: "#ad0505"

MouseArea {

    anchors.fill: parent
    onClicked: {
        myObject.helloMethod("hi");
}

}
}
@
Thanks for helping newbie : )

[lytze]

Oh I finally solved the problem

myclass.h
@
#ifndef MYCLASS_H
#define MYCLASS_H
#include <QObject>

class MyClass : public QObject
{
Q_OBJECT
public:
explicit MyClass(QObject *parent = 0);

signals:

public slots:
void helloMethod(const QString &msg);
};

#endif
@

myclass.cpp
@
#include "myclass.h"
#include <QDebug>

MyClass::MyClass(QObject *parent) :
QObject(parent)
{
}
void MyClass::helloMethod(const QString &msg) {
qDebug() << "Called the C++ slot with message:" << msg;
}
@