在Xcode真机调试开发过程中，无论是使用个人证书或者是企业证书，经常会遇到这样的问题：
The certificate used to
sign "XXX" has either expired or has been revoked. An updated
certificate is required to sign and install the application.

只需要将调试证书reset 一下即可。xcode - preference - 选中你的appleID - iOS Development  -  reset  搞定。