Draw Route or Direction

iPhone SDK Tips & Tricks
Download http://blog.kadirpekel.com/wp-content/uploads/MapWithRoutes.zip

Include MapView, Place, PlaceMark, and RegexKitLite file (.h and .m) to your code

Target Info, find Other Linker Flags, add "-licucore"

code:

MapView* mapView = [[[MapView alloc] initWithFrame:
CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)] autorelease];

[self.view addSubview:mapView];

Place* home = [[[Place alloc] init] autorelease];
home.name = @"Home";
home.description = @"Sweet home";
home.latitude = 41.029598;
home.longitude = 28.972985;

Place* office = [[[Place alloc] init] autorelease];
office.name = @"Office";
office.description = @"Bad office";
office.latitude = 41.033586;
office.longitude = 28.984546;

[mapView showRouteFrom:home to:office];


source:
http://blog.kadirpekel.com/2010/05/30/drawing_routes_onto_mkmapview_using_unofficial_google_maps_directions_api/