Qt Code: 
  1. /*creating an QStandardItem & appending 2 new QStandardItems such that
  2.  
  3. nameItem
  4. |
  5. |-------cyName  //having a text to set at runtime
  6. |-------cll          //having a text to set at runtime
  7.  
  8. */
  9. QStandardItem*  MainWindow::createNewCRListItem(const QStringList &sList)
  10. {
  11.     nameItem=new QStandardItem(); 
  12.     nameItem->setFlags(Qt::NoItemFlags);
  13.     nameItem->setColumnCount(1);
  14.  
  15.     QIcon lIcon(":/images/contact.png");
  16.     nameItem->setIcon(lIcon);
  17.     nameItem->data(Qt::DisplayRole);
  18.     QStandardItem cyName;
  20.  
  21.  
  22.     if(sList.size()!=3)
  23.         Q_ASSERT("error in parsing string list ");
  24.  
  25.     for (int j=0;j<sList.size();j++)
  26.     {
  27.         if (j==0)
  28.         {
  29.             const QString str= sList.at(j);
  30.             nameItem->setText(str);
  31.             qDebug()<< str;
  32.         }
  33.         if(j==1)
  34.         {
  35.             const QString str= sList.at(j);
  36.             cyName.setText(str);
  37.             qDebug()<< str;
  38.         }
  39.         if(j==2)
  40.         {
  41.             const QString str= sList.at(j);
  42.             cll.setText(str);
  43.             qDebug()<< str;
  44.         }
  45.     }
  46.     nameItem->appendRow(&cyName);
  47.     nameItem->appendRow(&cll);
  48.     //emit nameItem->emitDataChanged();
  49.     return nameItem;
  50. }
  51.  
  52. /* get a QList<QStringList> from parsing object
  53.     create a QStandardItem (above func)
  54.     set that QStandaradItem to a QStandardModel
  55.     later .. set the QStandardItem to QTreeView as shown below
  56. */
  57. void MainWindow::getlistFromParse( parseClass &pObj)
  58. {
  59.  
  60.     list = pObj.getList();  //return the reference of list
  61.     int modelSize= list.size();
  62.     int itemRow;
  63.     qDebug()<< "Row cont "<< modelSize;
  64.     crItemModel.setRowCount(modelSize);
  65.     qDebug()<<"check row: "<<crItemModel.rowCount();
  66.     crItemModel.setColumnCount(1);
  67.     qDebug()<<"check col : "<<crItemModel.columnCount();
  68.  
  69.     QList<QStringList>::const_iterator i;
  70.     for(i=list.constBegin(),itemRow=0;i!=list.constEnd();itemRow++,i++)
  71.     {
  72.         const QStringList& subList=*i;
  73.         QStandardItem *item= MainWindow::createNewCRListItem(subList);
  74.  
  75.         crItemModel.appendRow(item);   //application closing unexpectedly 
  76.         //crItemModel.setItem(itemRow,1,item);
  77.     }
  78. }
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while the stack trace shows segmantation fault in crItemModel.appendRow(item);
crItemModel is of type QStandardModel
and
Qt Code: 
  1. tree = new QTreeView(parent);
  2.     tree->setModel(&crItemModel);
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