title: Simple animation working on iOS 8 but not iOS 7
body: <p>I have a simple animation code below. It is supposed to move a UILabel from 250point below of its current location to its current location. It works fine in simulator on iOS 8.1 but when I try to test it on iOS 7.1 in simulator, the animation does not start from -250 , instead it starts from current location and moves upward. Any ideas why?</p>
  
  <pre><code>UIView.animateWithDuration(0.4, delay: 0, options: .CurveEaseOut, animations:{
      var animateLabel = self.signLabel.frame
      animateLabel.origin.y -= 250
      self.signLabel.frame = animateLabel
      }, completion: {finsihed in
      self.doAfterAnimation()
      })
  </code></pre>