问题
Is it possible to call alert "Allow to use current location" manually when using CoreLocation framework?
回答1:
No, it's automatically displayed when the app accesses Core Location. If the user rejects it, it's displayed a second time at the next launch, then it keeps quiet and isn't shown anymore.
See this answer how to detect if the user rejected the request.
来源：https://stackoverflow.com/questions/3749648/is-it-possible-to-call-alert-allow-to-use-current-location-manually