title: Generate walking directions with Maps app iOS
body: <p>As of now, I successfully generate directions with Maps app from my app with the following code :</p>
  
  <pre><code>NSString *formattedGroceryAddress = [[NSString stringWithFormat:@"%@",((EnhancedUIActionSheet *)actionSheet).grocery.address] stringByReplacingOccurrencesOfString:@" " withString:@"+"];
  NSString *routeString = [NSString stringWithFormat:@"http://maps.google.com/maps?saddr=%f,%f&amp;daddr=%@",localDataHelper.userLocation.coordinate.latitude,localDataHelper.userLocation.coordinate.longitude,formattedGroceryAddress];
  [[UIApplication sharedApplication] openURL:[NSURL URLWithString:routeString]];
  </code></pre>
  
  <p>It opens the Maps app with the appropriate <strong>driving</strong> directions. The thing is, I'd like to open Maps with the <strong>walking</strong> directions by default. Maybe I can pass another parameter in my request to do that.</p>
  
  <p>Anybody knows how ?</p>
  
  <p>Thanks !</p>