title: Place UIView back to the original y coordinate when tapped again.
body: <p>So I have a simple application set up to teach myself animations in iOS. So all I have currently is a UIView that's hooked up to a tap gesture recognizer. So when you tap the view, it implements this method: </p>
  
  <pre><code>-(IBAction)startAnimation:(id)sender
  {
      [UIView animateWithDuration:3.0 animations:^{
            tabView.center = CGPointMake(tabView.center.x, tabView.center.y + 60);
      }];
    //if tapped again, go back to original y coordinate 
  }
  </code></pre>
  
  <p>My question is how do I set it back to the original y coordinate position it came from upon an additional tap? </p>