public function index()
 {
     $model = new ArticleCategoryViewModel();
     $count = $model->count();
     $page = new Page($count);
     $show = $page->show();
     $list = $model->order('articleId DESC')->limit($page->firstRow . ',' . $page->listRows)->field('articleId,title,description,hits,createdAt,updateAt,status,sort,name,categoryId')->select();
     $this->assign('list', $list);
     $this->assign('page', $show);
     $this->display();
 }