public function clearFolder($obj, $id)
{
$file_name = Img::getFileName($obj);
$key = Img::getKey($file_name);
$imgs = $this->getList($id);
if (empty($imgs[$key])) {
return true;
} else {
$obj = Img::trimImgHost($imgs[$key]);
$this->remove($obj);
}
return false;
}