smarty模版引擎嵌套循环的解决方案

    //设备权限;
    case "sensor";
        //读取传感器分组和设备记录;
        $row = $db->fetchall('category', 'category_name,jk_sn,category_sorting', '', ' category_sorting DESC,category_id DESC');

        //统计分组传感器设备编号;
        foreach ($row as $k => $v) {
            $sql_l = "select jk_serialnum from " . $db->table('sensor');
            $sql_l .= " WHERE jk_sn ='" . $v['jk_sn'] . "'";
            $sql_l .= " GROUP BY sen_id ASC";
            $row[$k]["sensor"] = $db->queryall($sql_l);
        }
        break;

    {section name=v loop=$data}
    
        
            
                
                    分组名称：{$data[v].category_name} - 序列号:{$data[v].jk_sn}
                    
                        
                            {section name=p loop=$data[v].sensor}
                            
                            {/section}
                        
                    
                
            
        
    
    {/section}

Done!