Yii2 分页

    public function actionList($class_id = '') {
        $data = Article::find();
        if ($class_id) {
            $data->andWhere([ 'class_id' => $class_id ]);
        }
        $pages = new Pagination([ 'totalCount' => $data->count(), 'pageSize' => 30 ]);
        $model = $data->offset($pages->offset)->limit($pages->limit)->all();

        return $this->render('list', [
            'model' => $model,
            'pages' => $pages,
        ]);
    }