Iphone google maps - direction using latitude and longitude

Question

I am working on an iphone application. I know my current location (latitude and longitude) and destination (latitude and longitude). How can I use Google Maps to find directions. The URL for Google Maps is something like http://maps.google.com/maps?daddr=San+Francisco,+CA&saddr=cupertino "
From the above URL, unlike sources and destinations, I I want to use latitude and longitude. How?

Answer 1

NSString* url = [NSString stringWithFormat: @"http://maps.google.com/maps?saddr=%f,%f&daddr=%f,%f",
                                            currentLocation.coordinate.latitude, currentLocation.coordinate.longitude, 
                                            destLocation.coordinate.latitude, destLocation.coordinate.longitude];

[[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]];

Answer 2

Rob is right.

- , ( )

http://maps.google.com/maps?daddr=-37.8218956215849,144.9599325656891

http://maps.google.com/maps?saddr=-37.8218956215849,144.9599325656891&daddr=-37.8218956215849,144.9599325656891

start end lat/langs.

http://maps.google.com/maps?saddr=start&daddr=end

Answer 3

Have you tried just sticking to latitude and longitude as parameters? In my experience, the Google API is pretty free of what you can invest in them. The Google Local API can accept almost everything, including lat lng as a request, for example.