 func keyboardWillShow(notification: NSNotification)     {         var info:NSDictionary = notification.userInfo!         let keyboardFrame = info[UIKeyboardFrameEndUserInfoKey] as! NSValue         let keyboardSize = keyboardFrame.CGRectValue().size          var keyboardHeight:CGFloat = keyboardSize.height          let animationDurationValue = info[UIKeyboardAnimationDurationUserInfoKey] as! NSNumber          var animationDuration : NSTimeInterval = animationDurationValue.doubleValue          self.keyboardDelegate?.keyboardWill