Upload to appstore错误90034解决方案

最近在Upload to appstore出现的一个错误,ERROR ITMS-90034: "Missing or invalid signature. The bundle 'xxxxxx' at bundle path 'Payload/xxxxxx.app' is not signed using an Apple submission certificate."

网上找了半天也没找到,最后在stackoverflow找到一半的解决方案,并在朋友的帮助下终于解决了
http://stackoverflow.com/questions/33775122/error-itms-90034-missing-or-invalid-signature

原因原来是苹果的证书过期了,原因系统证书失效 需要到https://developer.apple.com/certificationauthority/AppleWWDRCA.cer
从新下载一个安装并复制到钥匙串中的系统中。解决了