今天早上 上班發現鑰匙串中的全部證書 都 提示此證書簽發者無效

Thanks for bringing this to the attention of the community and apologies for the issues you’ve been having. This issue stems from having a copy of the expired WWDR Intermediate certificate in both your System and Login keychains. To resolve the issue, you should first download and install the new

系統證書WWDR在2016年2月14日失效，須要更新WWDR系統證書。

解決的方法

1.下載證書，地址https://developer.apple.com/certificationauthority/AppleWWDRCA.cer

2.雙擊下載的證書。

3.在鑰匙串裏面的登錄 刪除 Apple Worldwide Developer Relations Certification Authority 證書

4.在鑰匙串裏面的系統 刪除 Apple Worldwide Developer Relations Certification Authority 證書

ps：假設這裏找不到Apple Worldwide Developer Relations Certification Authority 證書。點擊顯示-->顯示已過期的證書。

5.找到開始下載的Apple Worldwide Developer Relations Certification Authority 證書，雙擊。

ok 問題解決。

Missing iOS Distribution signing identity for …， 在打包的時候發現證書過期了。