How to draw routes on maps in ios 6?

Sayali picture Sayali · Nov 6, 2012 · Viewed 9.3k times · Source

I want to show maps & draw routes on maps. My application supports for ios 4 plus. So how should i use maps to work on ios 6 as well as before. Also i want to know sholud i use custom mapview in my app to display maps & routes or should i use

[[UIApplication sharedApplication] openURL:]

I have never user MapKits. So please provide if any tutorial. Also let me know if there are any rd party libraries that can be used.

Answer

Roland Keesom picture Roland Keesom · Dec 6, 2012

If you don't want an in-app map. Use the following:

NSString *destinationAddress = @"Amsterdam";

Class itemClass = [MKMapItem class];
if (itemClass && [itemClass respondsToSelector:@selector(openMapsWithItems:launchOptions:)]) {

    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder geocodeAddressString:destinationAddress completionHandler:^(NSArray *placemarks, NSError *error) {
        if([placemarks count] > 0) {

            MKPlacemark *placeMark = [[MKPlacemark alloc] initWithPlacemark:[placemarks objectAtIndex:0]];

            MKMapItem *mapItem = [[MKMapItem alloc]initWithPlacemark:placeMark];

            MKMapItem *mapItem2 = [MKMapItem mapItemForCurrentLocation];


            NSArray *mapItems = @[mapItem, mapItem2];

            NSDictionary *options = @{
        MKLaunchOptionsDirectionsModeKey:MKLaunchOptionsDirectionsModeDriving,
        MKLaunchOptionsMapTypeKey:
            [NSNumber numberWithInteger:MKMapTypeStandard],
        MKLaunchOptionsShowsTrafficKey:@YES
            };

            [MKMapItem openMapsWithItems:mapItems launchOptions:options];

        } else {
            //error nothing found
        }
    }];
    return;
} else {

    NSString *sourceAddress = [LocalizedCurrentLocation currentLocationStringForCurrentLanguage];

    NSString *urlToOpen = [NSString stringWithFormat:@"http://maps.google.com/maps?saddr=%@&daddr=%@",
                 [sourceAddress stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding],
                 [destinationAddress stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlToOpen]];
}

This opens the map application and checks if it is ios5 or ios6.

For ios5 I use the LocalizedCurrentLocation from this post http://www.martip.net/blog/localized-current-location-string-for-iphone-apps

For ios6 I use the CLGeocoder to get the placemark and then open the map with it and the current location.

Remember to add CoreLocation.framework and MapKit.framework