iOS keyboard scrollview tableview

ioskeyboard.swift

  override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        registerKeyboardNotifications()
    }
    
    override func viewWillDisappear(animated: Bool) {
        super.viewWillDisappear(animated)
        unregisterKeyboardNotifications()
    }
    
    func registerKeyboardNotifications() {
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardDidShow:", name: UIKeyboardDidShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
    }
    
    func unregisterKeyboardNotifications() {
        NSNotificationCenter.defaultCenter().removeObserver(self)
    }
    
    func keyboardDidShow(notification: NSNotification) {
        let userInfo: NSDictionary = notification.userInfo!
        let keyboardSize = userInfo.objectForKey(UIKeyboardFrameBeginUserInfoKey)!.CGRectValue.size
        let contentInsets = UIEdgeInsetsMake(0, 0, keyboardSize.height, 0)
        scrollView.contentInset = contentInsets
        scrollView.scrollIndicatorInsets = contentInsets
        
        var viewRect = view.frame
        viewRect.size.height -= keyboardSize.height
        if CGRectContainsPoint(viewRect, question.frame.origin) {
            let scrollPoint = CGPointMake(0, question.frame.origin.y - keyboardSize.height)
            scrollView.setContentOffset(scrollPoint, animated: true)
        }
    }
    
    func keyboardWillHide(notification: NSNotification) {
        scrollView.contentInset = UIEdgeInsetsZero
        scrollView.scrollIndicatorInsets = UIEdgeInsetsZero
    }