[solved]He said "undefined reference to 'vtable for MyTask(class)' "

[joeQ]

Would you help me? Thank you!
My program is little,

mytask.h

#ifndef MYTASK_H
#define MYTASK_H
#include <QRunnable>
#include <QObject>
#include <QDebug>
class MyTask : public QObject,public QRunnable//inherit object and runnable
{
    Q_OBJECT
public:
    MyTask();
signals:
    void Result(int iNumber);//my signals

protected:
    void run();
};

#endif // MYTASK_H

mytask.cpp

#include "mytask.h"

MyTask::MyTask()//first error at here,it said: " error: undefined reference to `vtable for MyTask'"
{

}

void MyTask::run()
{
    qDebug()<<"Tesk Run...";
    int iNumber = 0;
    for(int i=0; i<100; ++i)
    {
        iNumber += i;
    }
    qDebug()<<"Task done!";
    emit Result(iNumber);//second at here it said:" error: undefined reference to `MyTask::Result(int)'"
}

[SGaist]

Hi,

Usually it's because you added/removed the Q_OBJECT macro without re-running qmake. Re-run it and you should be good to build.

[joeQ]

@SGaist Yes,it is ok! I ran qmake and ran all,it is ok! thank you very much!