Question

the google maps API require parameters like this :

NSString *urlString=@"http://maps.google.com/maps?saddr=43.2923,5.45427&daddr=43.4697,5.65427";
    [[UIApplication sharedApplication]openURL:[NSURL URLWithString:urlString]];

in that example i have gived directly values of longitude/latitude but when i try to it as variables like this :

     float latStation=topStation.sstationLatitude;
    float longStation=topStation.sstationLongitude;
NSString *urlString=@"http://maps.google.com/maps?saddr=43.2923,5.45427&daddr=latStation,longStation";
        [[UIApplication sharedApplication]openURL:[NSURL URLWithString:urlString]];

this doesn’t work, how can i do please, thx in advance 🙂

Answer 1

You can use stringWithFormat: like this:

NSString *urlString = [NSString stringWithFormat:@"http://maps.google.com/maps?saddr=43.2923,5.45427&daddr=%f,%f",latStation,longStation];

You might want to have a look at the String Programming Guide.