Find the number of routes between two places

Question

I need to find out the number of routes from source to destination using the Google Maps API, and then find among them the one that is the shortest route.

I can get one route using this code

-(NSArray*) calculateRoutesFrom:(CLLocationCoordinate2D) f to: (CLLocationCoordinate2D) t {
    NSString* saddr = [NSString stringWithFormat:@"%f,%f", f.latitude, f.longitude];
    NSString* daddr = [NSString stringWithFormat:@"%f,%f", t.latitude, t.longitude];

    NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.google.com/maps?output=dragdir&saddr=%@&daddr=%@", saddr, daddr];
    NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];
    NSLog(@"api url: %@", apiUrl);
    NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl];
    NSString* encodedPoints = [apiResponse stringByMatching:@"points:\\\"([^\\\"]*)\\\"" capture:1L];

    return [self decodePolyLine:[encodedPoints mutableCopy]];
}

but i can't get some routes.

I am new to using the Google Maps API; I followed this tutorial .

How can i do this? Can someone post some sample code or tutorial?

Answer 1

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API Google Directions API

alternatives = true

Answer 2

google. , api, .. , ( ). : http://maps.googleapis.com/maps/api/directions/xml?origin=srcLatitude,srcLongitude&destination=destLatitude,destLongitude& mode=driving&sensor=false < > , , , .