how can thread receive data sent by main thread

[jpn]

label->moveToThread(thread)

label->moveToThread(thread)

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What are you trying to do? You must not touch GUI in a worker thread:

Although QObject is reentrant, the GUI classes, notably QWidget and all its subclasses, are not reentrant. They can only be used from the main thread.

[Myx]

What are you trying to do? You must not touch GUI in a worker thread:

just gave a guess but didnt try it this way...
i made something like this

class SerialThread : public QThread
{
    Q_OBJECT
 
    public:
        SerialThread(QObject *mainGUI, QObject *parent = 0)
        {
            GUI=mainGUI;
        } 
 
    protected:
        void run()
        {
            connect(GUI,SIGNAL(),this,SLOT());
            exec();
        }
 
    private:
        QObject *GUI;
 
    (...)
};

class SerialThread : public QThread
{
    Q_OBJECT
 
    public:
        SerialThread(QObject *mainGUI, QObject *parent = 0)
        {
            GUI=mainGUI;
        } 

    protected:
        void run()
        {
            connect(GUI,SIGNAL(),this,SLOT());
            exec();
        }
 
    private:
        QObject *GUI;

    (...)
};

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and while creating a thread

SerialThread *thread=new SerialThread(this);

SerialThread *thread=new SerialThread(this);

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