License to use Google Maps app that comes with iOS

In my application I have "get directions" from the user's current location. When a user taps the location he wants to go to. I do

[[UIApplcation sharedApplication]openURL:googleMapsURL];

Do I need some sort of signing identity, license from Google to send the user to the native Google Maps app when t开发者_JS百科he user wants directions if I want to send the App in to the Appstore?

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No need of any Licence from Google or any Signing identity to get approved from AppStore. You can show direction in Native Google Maps app. by opening the following URL string:

http://maps.google.com/maps?saddr=SOURCE_COORDINATES&daddr=DESTINATION_COORDINATES.