title: UIApplication openUrl not working with formatted NSString
body: <p>I have the following code to open google maps:</p>
  
  <pre><code>NSString *urlString = [NSString stringWithFormat:@"http://maps.google.com/maps?q=%@, Anchorage, AK",addressString];
  [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlString]];
  </code></pre>
  
  <p>But it doesn't work and there is no error. It just doesn't open.</p>