Xcode Revoke certificate

problem ：

Xcode Here are some situations ：

Certificate installation failed
No signing certificate "iOS Development" found
No "iOS Development" signing certificate matching team ID "xxxxx" with a private key was found.

Revoke certificate
Your account already has an Apple Development signing certificate for this machine, 
but its private key is not installed in your keychain. 
Xcode can create a new one after revoking your existing certificate.

Click on Revoke Then there will be failures , The following is the failure prompt , And the above screenshot problem will appear below the prompt
I have handled it here , Screenshot disappears , Unable to provide screenshot

Installing a certificate in the keychain failed (Error Domain=DVTSecErrorDomain Code=100021 "UNIX[Is a directory]" UserInfo={NSLocalizedDescription=UNIX[Is a directory]})

Question why

To configure Jenkins when （ Probably in operation Code signing & OS X keychain options To configure ）, Result in certificate invalidation

The main reason is ： All stored information in the key chain has disappeared , You can restart mac look down , Can pop up all kinds of pop ups without finding the key chain
I'm here ：
1、 Boot fingerprint disappears
2、chrome The password in the browser disappears , Cannot record again
3、 Certificate invalidation , And the most important thing you can't revoke certificate success

resolvent ：

Open the keychain --> preferences --> Restore the default Keychain
Then use it again xcode Sign in Developer account , Problem solving

ending

On the day of its launch , Self configuring Jenkins Occurs when , Suddenly it made my mind go dark , So be careful ！ brothers , As long as the code and people can run together , Don't do these fancy things every day ！ Take warning ！
But fortunately, the problem is solved , It does not affect the packaging , But my Jenkins collocation fastlane To pack , But it's OK to run , What kind of motorcycle do you want