/**
* 初始化widget，设置form标签头部
*
* @see \yii\base\Object::init()
*/
public function init()
{
if (!isset($this->options['id'])) {
$this->options['id'] = $this->getId();
}
echo Html::beginForm($this->action, $this->method, $this->options);
echo $this->field('_csrf')->hiddenInput(['value' => Yii::$app->request->getCsrfToken()]);
parent::init();
}
