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copied!<h2>Pre iOS 6</h2> <p>You need to use Core Location to get the current location, but with that lat/long pair, you can get Maps to route you from there, to a street address or location. Like so:</p> <pre class="lang-objc prettyprint-override"><code>CLLocationCoordinate2D currentLocation = [self getCurrentLocation]; // this uses an address for the destination. can use lat/long, too with %f,%f format NSString* address = @"123 Main St., New York, NY, 10001"; NSString* url = [NSString stringWithFormat: @"http://maps.google.com/maps?saddr=%f,%f&daddr=%@", currentLocation.latitude, currentLocation.longitude, [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; [[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]]; </code></pre> <p>Finally, if you do want to avoid using CoreLocation to explicitly find the current location, and want to use the <code>@"http://maps.google.com/maps?saddr=Current+Location&daddr=%@"</code> url instead, then <a href="http://www.martip.net/blog/localized-current-location-string-for-iphone-apps" rel="noreferrer">see this link that I provided in comments below</a> for how to localize the <strong>Current+Location</strong> string. However, you are taking advantage of another undocumented feature, and as Jason McCreary points out below, it may not work reliably in future releases.</p> <hr> <h2>Update for iOS 6</h2> <p>Originally, <strong>Maps</strong> used Google maps, but now, Apple and Google have separate maps apps. </p> <p><strong>1)</strong> If you wish to route using the Google Maps app, use <a href="https://developers.google.com/maps/documentation/ios/urlscheme#directions" rel="noreferrer">the comgooglemaps URL scheme</a>:</p> <pre class="lang-objc prettyprint-override"><code>NSString* url = [NSString stringWithFormat: @"comgooglemaps://?daddr=%@&directionsmode=driving", [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; BOOL opened = [[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]]; </code></pre> <p><strong>2)</strong> To use Apple Maps, you can use the new <code>MKMapItem</code> class for iOS 6. <a href="https://developer.apple.com/library/ios/#documentation/MapKit/Reference/MKMapItem_class/Reference/Reference.html" rel="noreferrer">See the Apple API docs here</a></p> <p>Basically, you will use something like this, if routing to destination <em>coordinates</em> (<code>latlong</code>):</p> <pre class="lang-objc prettyprint-override"><code> MKPlacemark* place = [[MKPlacemark alloc] initWithCoordinate: latlong addressDictionary: nil]; MKMapItem* destination = [[MKMapItem alloc] initWithPlacemark: place]; destination.name = @"Name Here!"; NSArray* items = [[NSArray alloc] initWithObjects: destination, nil]; NSDictionary* options = [[NSDictionary alloc] initWithObjectsAndKeys: MKLaunchOptionsDirectionsModeDriving, MKLaunchOptionsDirectionsModeKey, nil]; [MKMapItem openMapsWithItems: items launchOptions: options]; </code></pre> <p>In order to support both iOS 6+ and pre iOS 6 in the same code, I'd recommend using something like this code that Apple has on the <code>MKMapItem</code> API doc page:</p> <pre class="lang-objc prettyprint-override"><code>Class itemClass = [MKMapItem class]; if (itemClass && [itemClass respondsToSelector:@selector(openMapsWithItems:launchOptions:)]) { // iOS 6 MKMapItem available } else { // use pre iOS 6 technique } </code></pre> <p>This would assume that your Xcode Base SDK is iOS 6 (or <strong>Latest iOS</strong>).</p>

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