您是在测试Safari的浏览器吗？我发现很多报告，这是在iPad或iPhone上的Safari的常见问题，但也与Internet Explorer，我已经解决了过去。

Is the browser you're testing for Safari? I found a lot of reports that this is a common problem with Safari on iPad or iPhone, but also with Internet Explorer, which I've solved in the past.

当我在过去在Internet Explorer中遇到过这个问题，我通过在config.php中设置以下选项来修复它：

When I encountered this in the past on Internet Explorer, I fixed it by setting the following option in config.php:

$config['sess_match_useragent'] = FALSE;

显然，问题是由于每次用户加载时重新生成session_id任何页面。显然，CodeIgniter的本地会话类不再执行特定的检查。

Apparently, the problem is caused by the fact that the session_id() is regenerated every time a user loads any page. By not checking for the useragent any more, apparently, CodeIgniter's native session class no longer performs that particular check-up.

让我知道如果它工作！