   
   var leftButton: UIButton!
   var rightButton: UIButton!
-  var prevDeviceOrientation: UIDeviceOrientation = UIDevice.currentDevice().orientation
   
   init(frame: CGRect) {
     super.init(frame: frame)

      self.layout(currentOrientation)
    default:
      break
    }
    
    switch currentOrientation {
    case .FaceDown, .FaceUp, .Unknown: break
    default: prevDeviceOrientation = currentOrientation
    }
  }
  

    case LowerRightCorner
  }
  
  let screenHeight = CGRectGetHeight(UIScreen.mainScreen().bounds)
  let screenWidth = CGRectGetWidth(UIScreen.mainScreen().bounds)
  let kButtonSize = CGSize(width: 60, height: 60)
  let kLeftButtonTag = 1
  let kRightButtonTag = 2
