title: Google Analytics - Can anyone explain Dimensions and Metrics?
body: <p>I've implemented the new Google Analytics library (2.0) for iOS for app tracking. Tracking views etc is very simple, but I'm having trouble understanding how to use Dimensions and Metrics.</p>
  
  <p>I've read the documentation multiple times but I'm having trouble wrapping my head around it.</p>
  
  <p>Basically, I want to check how many of my users have a specific setting enabled when using the app.</p>
  
  <p>In semipseudo-code, this is what I'd like to do:</p>
  
  <pre><code>- (void)applicationLaunched
  {
      id&lt;GAITracker&gt; tracker = [[GAI sharedInstance] trackerWithTrackingId:@"My ID"];
  
      if (_mySettingIsEnabled) {
          [tracker setUserValue:@"Enabled" forKey:@"My Setting"];
      } else {
          [tracker setUserValue:@"Disabled" forKey:@"My Setting"];
      }
  }
  </code></pre>
  
  <p>Can anyone explain to me how I would do this per user with Dimensions and Metrics?</p>