/**
  **显示重设密码的表单(get),重新设置登陆密码(post).
  * @return string whether or not the password has been reset successfully
  */
 public function actionResetPassword()
 {
     if (Yii::$app->request->isGet) {
         $csrf = Yii::$app->request->csrfToken;
         return $this->render('reset-password', ['csrf' => $csrf]);
     }
     $model = new ResetPasswordForm();
     if ($model->load(Yii::$app->request->post(), '') && $model->reset()) {
         AjaxResponse::success();
     }
     AjaxResponse::fail(null, $model->errors);
 }