Xcode/iOS: How to hide Navigation- AND ToolBar on scroll down?

Question

I would like to hide both bars on scroll down on my iPhone. When I scroll up, they should appear again.. How can I handle this?

Answer 1

Here's my solution in Swift; it works beautifully

func scrollViewDidScroll(scrollView: UIScrollView) {
    let navController: UINavigationController = self.navigationController!
    if self.collectionView.panGestureRecognizer.translationInView(self.view).y <= 0.0 {
        defaultCenter.postNotificationName("stuffShouldHide", object: self)
    } else {
        defaultCenter.postNotificationName("stuffShouldUnhide", object: self)
    }
}