Apple Development: The development certificate shows a workaround for "Invalid issuer of this certificate"

Over the years, it is estimated that a lot of people will encounter "the issuer of this certificate is invalid" problem, so start on the Apple Developer Center website, re-edit the certificate, and then delete the original expired certificate can be normal operation. But there is a situation is just the creation of a good certificate, installed on the prompt "the issuer of this certificate is invalid", at first thought it was a certificate problem, and then repeated attempts are this problem, the instant egg pain, there are wood. In fact, only because Apple worldwide Developer Relations Certification Authority certificate expiration, but this certificate is not usually displayed after expiration, we need to manually find, open the keychain, Show expired certificates (default is hidden), click Show-> Show expired certificates, and then search Apple Worldwide Developer Relations Certification Authority The certificate, delete and reinstall it, As follows:

Finally in the provision of a certificate download address: Https://developer.apple.com/certificationauthority/AppleWWDRCA.cer download, double-click to open the installation, and then reload we download a good development certificate, You will then find that the certificate becomes "This certificate is valid."