Qt 比对TreeItem节点

 void TreeModel::settingsUpdate(const QStringList &lines){
      QList<TreeItem*> parents;
      TreeItem* it1,* item1 = new TreeItem(rootItem->itemData);
      TreeItem* it2,* item2 = rootItem;
      QList<int> indexs;
      int i1 = ,i2 = ;
      setupModelData(lines,item1);
  _repeat:
      for(; i1 < item1->childCount() ; ++i1)
          for(; i2 < item2->childCount() ; ++i2)
          {
              it1 = item1->child(i1);
              it2 = item2->child(i2);
              if( it1->data().toString() == it2->data().toString() )
              {
                  if(it1->childCount() ==  )
                  {
                      QModelIndex index = createIndex(it2->childNumber(), , it2);
                      if (it2->setData(index.column(), it1->data()))
                          emit dataChanged(index, index);
                     settingItem.enqueue(it2);
                     ++i2;
                     break;
                  }
                  else if(it2->childCount() > )
                  {
                      parents << item1 << item2;
                      indexs  << i1 +  << i2 + ;
                      item1 = it1;
                      item2 = it2;
                      i1 =  ;
                      i2 =  ;
                      goto _repeat;
                  }
              }
          }
      if(!parents.isEmpty())
      {
          item2 = parents.last();
          parents.pop_back();
          item1 = parents.last();
          parents.pop_back();

          i2 = indexs.last();
          indexs.pop_back();
          i1 = indexs.last();
          indexs.pop_back();
          goto _repeat;
      }
      delete item1;
      optMode = OptWrite;
 }