refactor:重构gridview的filter模块样式

vendor/iron/grid/GridView.php

@@ -216,6 +216,9 @@ class GridView extends BaseListView
     public $layout = <<< HTML
     <div class="card-body">
         <div id="example2_wrapper" class="dataTables_wrapper  dt-bootstrap4">
+            <div class="row">
+                {filter}
+            </div>
             <div class="row">
                 <div class="col-sm-12 col-md-6">
                     {batch}
@@ -226,9 +229,9 @@ class GridView extends BaseListView
 <!--                    <button type="button" id="export" class="btn btn-default"><i class="fa fa-file-excel-o"></i>导出</button>-->
                     {content}
                 </div>
-                <div class="col-sm-12 col-md-6">
-                            {filter}
-                </div>
+<!--                <div class="col-sm-12 col-md-6">-->
+<!--                            {filter}-->
+<!--                </div>-->
             </div>
             <div class="row">
                 <div class="col-sm-12">
@@ -316,6 +319,7 @@ HTML;
         $this->registerIcheckJs();
         $this->registerConfirmJs();
         $this->registerExportJs();
+        $this->registerCss();
         parent::run();
     }
 
@@ -745,4 +749,17 @@ SCRIPT;
         return Html::tag('div', $this->content, ['class' => 'btn-group']);
     }
 
+    /**
+     * 注册css
+     */
+    protected function registerCss()
+    {
+        $css =<<<CSS
+            .form-control{
+                width: 192px;
+            }
+        CSS;
+        $this->getView()->registerCss($css);
+    }
+
 }