make UIView in UIScrollView stick to the top when scrolled up

Question

So in a UITableView when you have sections the section view sticks to the top until the next section overlaps it and then it replaces it on top. I want to have a similar eff

Answer 1

Swift Solution based on EVYA's response:

var navigationBarOriginalOffset : CGFloat?

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)
    navigationBarOriginalOffset = navigationBar.frame.origin.y
}

func scrollViewDidScroll(scrollView: UIScrollView) {
    navigationBar.frame.origin.y = max(navigationBarOriginalOffset!, scrollView.contentOffset.y)
}