YII2框架中ActiveDataProvider与GridView的配合使用操作

<?php

namespace app\models;

use yii\db\ActiveRecord;
use yii\data\ActiveDataProvider;

class MyUser extends ActiveRecord
{

  //返回要操作的表名
  public static function tableName()
  {
    return '{{%user}}';
  }

  //设置规则
  //注意，如果没有给字段设置规则，GridView的筛选项是不会出现的
  public function rules()
  {
    return [
      [['id', 'name', 'sex', 'age'], 'trim'],
      [['id', 'sex', 'age'], 'integer'],
      ['name', 'string'],
    ];
  }

  //查询
  public function search($params)
  {
    //首先我们先获取一个ActiveQuery
    $query = self::find();
    //然后创建一个ActiveDataProvider对象
    $provider = new ActiveDataProvider([
      //为ActiveDataProvider对象提供一个查询对象
      'query' => $query,
      //设置分页参数
      'pagination' => [
        //分页大小
        'pageSize' => 3,
        //设置地址栏当前页数参数名
        'pageParam' => 'p',
        //设置地址栏分页大小参数名
        'pageSizeParam' => 'pageSize',
      ],
      //设置排序
      'sort' => [
        //默认排序方式
        'defaultOrder' => [
          'id' => SORT_DESC,
        ],
        //参与排序的字段
        'attributes' => [
          'id', 'name', 'sex', 'age'
        ],
      ],
    ]);

    //如果验证没通过，直接返回
    if (!($this->load($params) && $this->validate())) {
      return $provider;
    }

    //增加过滤条件
    $query->andFilterWhere(['id' => $this->id])
      ->andFilterWhere(['like', 'name', $this->name])
      ->andFilterWhere(['sex' => $this->sex])
      ->andFilterWhere(['age' => $this->age]);

    return $provider;
  }
}

<?php

namespace app\controllers;

use YII;
use yii\web\Controller;
use app\models\MyUser;

class TestController extends Controller
{
  public function actionTest()
  {

    $user = new MyUser();
    //调用模型search方法，把get参数传进去
    $provider = $user->search(YII::$app->request->get());

    return $this->render('test', [
      'model' => $user,
      'provider' => $provider,
    ]);
  }
}

<?php
use yii\helpers\Url;
use yii\helpers\Html;
use yii\grid\GridView;
?>

<div id="page-wrapper">
  <div class="row">
    <div class="col-lg-12">
      <button class="btn btn-primary" id="showSelBtn">显示我选中的</button>
    </div>
  </div>
  <div class="row">
    <div class="col-lg-12">
      <?php echo GridView::widget([
        //设置GridView的ID
        'id' => 'myUserGridView',
        //设置数据提供器
        'dataProvider' => $provider,
        //设置筛选模型
        'filterModel' => $model,
        'columns' => [
          //复选框列
          ['class' => 'yii\grid\CheckboxColumn'],
          //显示序号列
          ['class' => 'yii\grid\SerialColumn'],
          [
            //设置字段显示标题
            'label' => 'ID',
            //字段名
            'attribute' => 'id',
            //格式化
            'format' => 'raw',
            //设置单元格样式
            'headerOptions' => [
              'style' => 'width:120px;',
            ],
          ],
          [
            'label' => '姓名',
            'attribute' => 'name',
            'format' => 'raw',
          ],
          [
            'label' => '头像',
            'attribute' => 'head_img',
            'format' => 'raw',
            //通过该返回值，我们可以任意控制列数据的显示
            //$data指向的是当前行的数据结果集
            'value' => function ($data) {
              return '<img src="' . '/' . ltrim($data->head_img, '/') . '" width="60px">';
            },
          ],
          [
            'label' => '性别',
            //设置筛选选项
            'filter' => [0 => '男', 1 => '女'],
            'attribute' => 'sex',
            'format' => 'raw',
            'value' => function ($data) {
              return ($data->sex == 0) ? '男' : '女';
            }
          ],
          [
            'label' => '年龄',
            'attribute' => 'age',
            'format' => 'raw',
          ],
          [
            'header' => '操作',
            'class' => 'yii\grid\ActionColumn',
            //设置显示模板
            'template' => '{upd} {del}',
            //狼蚁网站SEO优化的按钮设置，与上面的模板设置相关联
            'buttons' => [
              'upd' => function ($url, $model, $key) {
                return '<a href="' . Url::toRoute(['test/upd', 'id' => $key]) . '" rel="external nofollow" class="btn btn-warning">修改</a>';
              },
              'del' => function ($url, $model, $key) {
                return '<a href="' . Url::toRoute(['test/del', 'id' => $key]) . '" rel="external nofollow" class="btn btn-danger">删除</a>';
              },
            ],
          ],
        ],
      ]); ?>
    </div>
  </div>
</div>

<?php echo Html::jsFile('@web/js/jquery-3.3.1.min.js'); ?>
<script type="text/javascript">
  $("#showSelBtn").on("click", function () {
    var keys = $("#myUserGridView").yiiGridView('getSelectedRows');
    alert(keys);
  });
</script>