I am using external slot to change line edit value, after connecting this slot and run my application it crash.
I am runing in this issuse from the last 4 days, I try many thinks but it doesn't work to me.
I have tow classes, one for GUI, and one for changing widget values and other things:
getdata class:
Qt Code: 
  1. #ifndef GETDATA_H
  2. #define GETDATA_H
  3.  
  4. #include <QObject>
  5.  
  6. #include "store.h"
  7.  
  8. class QString;
  9.  
  10. class GetData : public QObject, private Ui::Store
  11. {
  12.     Q_OBJECT
  13.         public:
  14.             GetData();
  15.  
  16.         private slots:
  17.             void setItemCountity();
  18. };
  19.  
  20. #endif // GETDATA_H[/QTCLASS]
To copy to clipboard, switch view to plain text mode 

Qt Code: 
  1. #include <QString>
  2.  
  3. #include "getdata.h"
  4.  
  5. GetData::GetData() : Ui::Store()
  6. {
  7.  
  8. }
  9.  
  10. void GetData::setItemCountity()
  11. {
  12.   addressWholesaleAdd->setText("dddddddd");
  13. }
To copy to clipboard, switch view to plain text mode 

store class:
Qt Code: 
  1. #ifndef STORE_H
  2. #define STORE_H
  3.  
  4. #include <QMainWindow>
  5.  
  6. #include "ui_store.h"
  7.  
  8. class Store : public QMainWindow
  9. {
  10.     Q_OBJECT
  11.         public:
  12.             Store(QWidget *parent = 0);
  13.  
  14.         private:
  15.             Ui::Store ui;
  16.  
  17.         private slots:
  18. };
  19.  
  20. #endif // STORE_H
To copy to clipboard, switch view to plain text mode 

Qt Code: 
  1. #include "store.h"
  2. #include "getdata.h"
  3.  
  4. Store::Store(QWidget *parent) : QMainWindow(parent)
  5. {
  6.     ui.setupUi(this);
  7.  
  8.     .
  9.     .
  10.     .
  11.  
  12.     GetData *dd = new GetData;
  13.  
  14.     connect(ui.addWholesaleAdd, SIGNAL(clicked()), dd, SLOT(setItemCountity()));
  15. }
To copy to clipboard, switch view to plain text mode