/**
  * 保存数据
  *
  * @return array
  */
 public function actionSave()
 {
     $config = \Yii::$app->request->post('config');
     if ($config) {
         foreach ($config as $name => $value) {
             DpConfig::replaceByName($name, $value, 1);
         }
         // logo上传
         $uploadModel = new ConfigUploadForm();
         $uploadModel->imageFile = UploadedFile::getInstance($uploadModel, 'logo_file');
         if ($uploadModel->upload()) {
             DpConfig::replaceByName('website.logo', $uploadModel->savePath, 1);
         } elseif (!$this->getConfig('website.logo')) {
             foreach ($uploadModel->getErrors() as $error) {
                 foreach ($error as $message) {
                     return $this->renderError($message);
                 }
             }
         }
         // 二维码上传
         $uploadModel = new ConfigUploadForm();
         $uploadModel->imageFile = UploadedFile::getInstance($uploadModel, 'qr_file');
         if ($uploadModel->upload()) {
             DpConfig::replaceByName('website.qr', $uploadModel->savePath, 1);
         } elseif (!$this->getConfig('website.qr')) {
             foreach ($uploadModel->getErrors() as $error) {
                 foreach ($error as $message) {
                     return $this->renderError($message);
                 }
             }
         }
         return $this->renderSuccess('保存成功');
     } else {
         return $this->renderError('数据不能为空');
     }
 }