Detect direction of UIScrollView scroll in scrollViewWillBeginDragging

Question

I did google enough, & I did check posts like these ( Finding the direction of scrolling in a UIScrollView? ) in stackoverflow before posting this. I have a dynamic numb

Answer 1

There seem to be issues with detecting scroll direction based on the translation of the scrollView's pan recognizer in iOS 7+. This seems to be working pretty seamlessly for my purposes

func scrollViewDidScroll(scrollView: UIScrollView) {
    if !scrollDirectionDetermined {
        let translation = scrollView.panGestureRecognizer.translationInView(self.view)
        if translation.y > 0 {
            println("UP")
            scrollDirectionDetermined = true
        }
        else if translation.y < 0 {
            println("DOWN")
            scrollDirectionDetermined = true
        }
    }
}

func scrollViewWillBeginDragging(scrollView: UIScrollView) {
    scrollDirectionDetermined = false
}

func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
    scrollDirectionDetermined = false
}