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

scrollView.panGestureRecognizer translationInView:scrollView doesn't report anything useful in scrollViewWillBeginDragging in iOS 7.

This does:

In the @interface

BOOL scrollDirectionDetermined;

and:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (!scrollDirectionDetermined) {
        if ([scrollView.panGestureRecognizer translationInView:scrollView.superview].x > 0) {
            //scrolling rightwards
        } else {
             //scrolling leftwards
       }
    scrollDirectionDetermined = YES;
    }
}

and:

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
    scrollDirectionDetermined = NO;
}