Launching Map App on iOS to show route between source and destination location

+(void)showRouteOnMapFrom:(CLLocationCoordinate2D)sourceCoordinate to:(CLLocationCoordinate2D) destCoordinate
{
    NSString* urlString = [NSString stringWithFormat: @"http://maps.google.com/maps?saddr=%f,%f&daddr=%f,%f",
                           sourceCoordinate.latitude, sourceCoordinate.longitude,destCoordinate.latitude, destCoordinate.longitude];
    
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlString]];
}

Enable ARC in a Non ARC project

Small trick to enable ARC on a specific file in a non-ARC project by using the flag -fobjc-arc