title: Opening Maps App with Current Location & Directions in iOS 5
body: <p>Hi I tried using this to open the maps app with current location and get directions to whatever I put for the directions. When I click the button on my iPhone nothing happens but it's being clicked. What am I doing wrong?</p>
  
  <pre><code>NSString *url = [NSString stringWithFormat: @"http://maps.google.com/maps?saddr=Current+Location&amp;daddr=%@ %@ %@ %@",
                       streetString , cityString, stateString, zipString];
      [[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]];
  </code></pre>