iOS: EKEventStore sources / defaultCalendarForNewEvents / calendarsForEntityType all return nothing AFTER authorization

OK, it turns out there was a small line of code in a viewDidLoad that was before the [eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error code and that tried to access the eventStore. It was superfluous and did not need to be happening and I had not noticed it. Once I removed this code the stuff now works, so it does go back to needing to authorize, as even after authorization, the eventStore was already "bad" due to this previous access.

The problem can also be solved by recreating the EKEventStore instance in the callback once access is granted.