免证书xcode环境提示证书过期

参考:http://kqwd.blog.163.com/blog/static/4122344820117191351263/

真机调试提示如下：

The identity used to sign the executable is no longer valid.

Please verify that your device’s clock is properly set, and that your signing certificate is not expired.

如果操作无误，那就确认一下自己越狱的设备是否安装了cydia appsync.这个是破解itunes传输的。