Auto-Scroll in Swift, wherever you want, everywhere - not perfect but works like a charm

AutoScroll.swift

extension UIView {

    //MARK: - AutoScroll Stuff -
    private func autoScroll(view: UIView, kbFrame: CGRect, animated: Bool) {

        let offset            = kbFrame.height + 20
        let deltaOffset       = CGRectGetMinY(view.convertRect(view.bounds, toView: self.view)) - offset

        autoScrollOffset      = deltaOffset < 0 ? 0 : deltaOffset
        totalAutoScrollOffset = autoScrollOffset

        if autoScrollOffset > 0 {
            UIView.animateWithDuration(animated ? 0.3 : 0, animations: {
                self.view.transform(y: -self.autoScrollOffset)
                }, completion: { (finished) -> Void in
                  self.autoScrollAnimating = false
            })

        }else {
            autoScrollAnimating = false
        }

    }

    private func resetAutoScroll(animated: Bool) {
        if totalAutoScrollOffset > 0 {
            UIView.animateWithDuration(animated ? 0.3 : 0, animations: {
                self.view.transform(y: self.autoScrollOffset)
                }, completion: { (finished) -> Void in
                    self.autoScrollAnimating = false
            })
        }else {
            autoScrollAnimating = false
        }
        totalAutoScrollOffset = 0
    }

    func willautoScrollOffset(notification: NSNotification){
        if !inhibitAutoScroll {
            guard let kbInfo = notification.userInfo else { return }
            guard let kbFrame = kbInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue else { return }
            guard let firstRespView = self.view.findFirstResponder() else { return }

            keyboardFrame = kbFrame.CGRectValue()

            if !autoScrollAnimating {
                autoScrollAnimating = true
                autoScroll(firstRespView, kbFrame: keyboardFrame, animated: true)
            }
        }
    }

    func willautoScrollReset(notification: NSNotification){
        if !inhibitAutoScroll {
            autoScrollAnimating = true
            resetAutoScroll(true)
        }
    }
    
        func findFirstResponder() -> UIView? {
        if self.isFirstResponder() {
            return self
        }
        for subview in subviews {
            if let respView = subview.findFirstResponder() {
                return respView
            }
        }

        return self
    }


    func transform(x: CGFloat? = 0, y: CGFloat? = 0, width: CGFloat? = 0, height: CGFloat? = 0){
        self.frame = CGRectMake(self.frame.origin.x + x!, self.frame.origin.y + y!, self.frame.width + width!, self.frame.height + height!)
    }
    
}

// Place this into your viewWillAppear() motherBaseViewController:
    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "willautoScrollOffset:", name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "willautoScrollReset:", name: UIKeyboardWillHideNotification, object: nil)
    }
//Place this into your viewWillDisappear motherBaseViewController
    override func viewWillDisappear(animated: Bool) {
        super.viewWillDisappear(animated)
         NSNotificationCenter.defaultCenter().removeObserver(self)
    }
    
//Why viewWillAppear/Disappear instead of viewDidLoad/deinit ?
//because with this method, you avoid glitch-scrolling when you push another view containing a scrollView