带有头文件c ++的getter和setter

Question

Getter and Setter method not working in Qt thread.

I set QString value from main function and I want to get that value from QThread .

My codes

main.cpp

#include "networkthread.h"
#include <QCoreApplication>
#include "msg.h"
#include <QString>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QString str = argv[1];

    QString strb = argv[2];

    msge myObj;
    myObj.setstra(str);

    myObj.setstrb(strb);

    NetworkThread networkThread;

    networkThread.start();
    int result = a.exec();

    networkThread.requestInterruption();
    networkThread.exit();
    networkThread.wait(2000);

    return 0;
}

msg.h

#include <iostream>
#include <QString>
using namespace std;

class msge
{
private:
    QString stra;
    QString strb;

public:
    void setstra(QString s)
    {
        stra = s;
    }

    QString getstra()
    {
        return stra;
    }

    void setstrb(QString s)
    {
        strb = s;
    }

    QString getstrb()
    {
        return strb;
    }
};

networkthread.cpp

#include "networkthread.h"
#include "msg.h"
#include <QDebug>
#include <QString>
#include <iostream>
#include <QCoreApplication>

void NetworkThread::run()
{

    while (!isInterruptionRequested())
    {
        msge myObj;
        QString str = myObj.getstra();
        QString strb = myObj.getstrb();
        qDebug() << str + "str first";
        qDebug() << strb + "str second";
        break;
    }

    QCoreApplication::quit();
}

networkthread.h

#ifndef NETWORKTHREAD_H
#define NETWORKTHREAD_H

#include <QThread>
#include <QString>

class NetworkThread : public QThread
{
public:
    void run();

private:
};

#endif // NETWORKTHREAD_H

output

C:\Users\prade\Documents\untitled2\release>untitled2 hello hai
"str first"
"str second"

the getter method not worked.

What I did wrong in this?

How can I solve this?

Answer 1

In NetworkThread you create a new msge object

void NetworkThread::run()
{

  while(!isInterruptionRequested()) {

 msge myObj;   <<<<<<<<<<<<<<<
 
 QString str = myObj.getstra();

This is a different object than you called the setters ( setstra() ) on in main.cpp .

The msge myObj; in main.cpp is not used or passed to NetworkThread in anyway.

You will need to pass your values to the NetworkThread object and call the setters on its version of the msge object first.