use yii\data\Pagination;

function actionFenye(){
    $data = Field::find(); //Field为model层,在控制器刚开始use了field这个model,这儿可以直接写Field,开头大小写都可以,为了规范,我写的是大写
    $pages = new Pagination(['totalCount' =>$data->count(), 'pageSize' => '2']);  //实例化分页类,带上参数(总条数,每页显示条数)
    $model = $data->offset($pages->offset)->limit($pages->limit)->all();
    return $this->renderPartial('fenye',[
      'model' => $model,
      'pages' => $pages,
    ]);
}