public function clearcache(){

    $rtim=del_dir(APP_PATH.'Runtime');


    if($rtim){

        $this->success('清除成功');

        echo '<script language="javascript">';
        echo 'parent.location.reload();';
        echo '</script>';


        /*$this->assign('Index/index', "javascript:window.parent.location.reload();");
        $this->success('清除成功');*/


    }else{
        $this->error('清除失败');
    }
}