Yii::使用GridView::widget 定义系统增删改查按钮，和自定义按钮

['class' => 'yii\grid\ActionColumn'], //系统菜单操作//自定义功能按钮[    'label' =>'更多操作',    'format'=>'raw',    'value' => function($data){        $button = '' ;        $showUrl      = "/order-change/view?id=".$data->id   ; //查看详情        $button .= Html::a('查看详情', $showUrl, ['title' => '查看详情']).'<br>' ;        return $button;    }],