I am using Google Places API to pull a list of resturants, and I am displaying them on map. However, since Apple has switched there map services over from Google in iOS 6.0, I
I decided to use Google Maps JavaScript API. Although, it is a little more difficult to deal with, mainly the JavaScript through Objective-C, it is a solution. The map is displayed through a web view, and I use JavaScript to interact with the map.
https://developers.google.com/maps/documentation/javascript/tutorial#api_key
I will wait to accept this answer, to see if anyone else has any thoughts. I just wanted to post this, in case it helps someone else.
Edit:
Google recently released a Maps SDK for iOS, this is the better solution now.
https://developers.google.com/maps/documentation/ios/