private function _assignFollowState($fids = null)
{
// 批量获取与当前登录用户之间的关注状态
$follow_state = model('Follow')->getFollowStateByFids($this->mid, $fids);
$this->assign('follow_state', $follow_state);
// dump($follow_state);exit;
$union_state = model('Union')->getUnionStateByFids($this->mid, $fids);
$this->assign('union_state', $union_state);
// dump($union_state);exit;
}