由 dawei 装cydia 装了个applocker 加密的东西 但是 密码忘记了 ，找了很多帖子没有找到方法,于是发邮件给源代码作者得到了一个回复 现在已经解决，希望能帮助到有需要的人。
作者原文
here's how to reset applocker's settings:
[align=-webkit-auto]
just delete this file:
/var/mobile/library/preferences/com.nnfyrbsnss.applocker.plist
doing this will revert all of you applocker settings (password, locked apps) so you can go to settings and make sure what password you type in this time.
i hope that helps you. if you need any more of assistance, email me. i'm trying to reply immediately (if i'm not sleeping).
let me know how this goes.
ori.
方法是用 ifunbox 删除 /var/mobile/library/preferences/com.nnfyrbsnss.applocker.plist