title: Hide activity indicator
body: <p>On my main storyboard I created an Activity Indicator. </p>
  
  <p>I want to hide my activity indicator until the button has been pressed.
  Is there a way I can do that?</p>
  
  <p>When I press the button the activity indicator starts animating.  </p>
  
  <pre><code>self.indicator.hidden = NO;
  [self.indicator startAnimating];
  [self performSelector:@selector(showData) withObject:nil afterDelay:2.0f];
  </code></pre>
  
  <p>Can I hide the activity indicator until the button has been pressed, and then show this activity indicator?</p>