Application/Admin/Controller/ThinkController.class.php里
获取数据展示字段$grids = preg_split('/[;\r\n]+/s', $model['list_grid']); 正则有问题会导致一个空的字段出现。
简单处理方法是
$grids = preg_split('/[;\r\n]+/s', $model['list_grid']);
foreach ($grids as &$value) {
if(empty($value)) continue;

增加 if(empty($value)) continue;