private function fileImageUpload($option)
 {
     if (empty($option['width'])) {
         $option['width'] = 600;
     }
     if (!empty($_FILES['file']['name'])) {
         $ret = Utility::upload($_FILES['file']);
         if (is_error($ret)) {
             $this->frameCallback($ret);
         }
         File::imageThumb($ret['abs'], $ret['abs'], $option['width']);
         $result = array();
         $result['filename'] = $ret['filename'];
         $result['url'] = $ret['url'];
         $result['error'] = 0;
         $this->frameCallback($result);
     } else {
         $this->frameCallback(error(-1, '请选择要上传的图片!'));
     }
 }