How to invoke iPhone Maps for Directions with Current Location as Start Address

Question

I know it\'s possible to start the iPhone maps application by calling openURL on a google maps URL with parameters saddr and daddr wit

Answer 1

For iOS6 the apple docs recommend using the equivalent maps.apple.com URL Scheme

so use

http://maps.apple.com/maps?saddr=%f,%f&daddr=%f,%f

instead of

http://maps.google.com/maps?saddr=%f,%f&daddr=%f,%f

to be backwards compatible the code would be

    NSString* versionNum = [[UIDevice currentDevice] systemVersion];
    NSString *nativeMapScheme = @"maps.apple.com";
    if ([versionNum compare:@"6.0" options:NSNumericSearch] == NSOrderedAscending)
        nativeMapScheme = @"maps.google.com";
    }
    NSString* url = [NSString stringWithFormat: @"http://%@/maps?saddr=%f,%f&daddr=%f,%f", nativeMapScheme
             startCoordinate.latitude, startCoordinate.longitude,
             endCoordinate.latitude, endCoordinate.longitude];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];

there is a whole load of other supported parameters for the Apple Maps URL scheme : Apple URL Scheme Reference

you can use these iOS version detection macros if you have conditional code in other parts of your code. iOS version macros