ipad device debugging issues

When generating development certificate, ios development certificate and APNs development ios certificate What is the difference?
Furthermore, why ios app development option can not be selected when generating a certificate.

Finally, when generating development provisioning profiles, certificates can only choose iOS development but can not choose APNs development ios certificate, or even directly not show APNs types of certificates.


Want to know how a friend explained.

Reply:
Nobody reply, I reply on their own under the bar: My solution is to pre-existing configuration, certificates and so removed, you can re-build. I feel I could have built the number or order restrictions, so this problem. You can delete if you have encountered similar problems, determine before, try.