keyboardWillShow how to apply to only 1 textView in Swift iOS

We have an app which looks like this: App here We have UITextViews in the top and in the bottom of the view and I had been asking for some help in order to move the screen up when the keyboard appears. It actually works perfect but I'm wondering how to apply this only for the UITextView (textViewInteriorDos) in the bottom of the screen, which was touching the keyboard before. How to apply correctly the if/ else statement in this methods guys?? The top UITextView is not covered with the keyboard, so we don't need it. class viewControllerCuatro: UIViewController, UITextViewDelegate { @IBOutlet weak var textViewInteriorUno: UITextView! @IBOutlet weak var textViewInteriorDos: UITextView! override func viewDidLoad() { self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "Atrás", style: UIBarButtonItemStyle.Plain, target: nil, action: nil) **NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: self.view.window) NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: self.view.window)** } func keyboardWillShow(sender: NSNotification) { // 1 let userInfo: [NSObject : AnyObject] = sender.userInfo! // 2 let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size let offset: CGSize = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue.size // 3 if keyboardSize.height == offset.height { UIView.animateWithDuration(0.1, animations: { () -> Void in self.view.frame.origin.y -= keyboardSize.height }) } else { UIView.animateWithDuration(0.1, animations: { () -> Void in self.view.frame.origin.y += keyboardSize.height - offset.height }) } } func keyboardWillHide(sender: NSNotification) { let userInfo: [NSObject : AnyObject] = sender.userInfo! let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size self.view.frame.origin.y += keyboardSize.height } override func viewWillDisappear(animated: Bool) { NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: self.view.window) NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: self.view.window) } override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { if textViewInteriorUno.text == "" || textViewInteriorUno.text.isEmpty == true || textViewInteriorDos.text == "" || textViewInteriorDos.text.isEmpty == true { textViewInteriorUno.resignFirstResponder() textViewInteriorDos.resignFirstResponder() } else{ self.textViewInteriorUno.resignFirstResponder() self.textViewInteriorDos.resignFirstResponder() } } func textView(textView: UITextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool{ var shouldReplace = true // For most cases, return true, only modify if we have a special case // If the textView is 'textViewInteriorUno' if textView.isEqual(textViewInteriorUno) { let newLength = textViewInteriorUno.text.utf16.count + text.utf16.count - range.length shouldReplace = newLength <= 12 // will be true if the length is <= 12 } else if textView.isEqual(textViewInteriorDos) { let newLength = textViewInteriorDos.text.utf16.count + text.utf16.count - range.length shouldReplace = newLength < 13 // Will be true if the length > 6 } return shouldReplace }