Disable UIScrollView bounce at the top of the screen

Question

I have UIScrollView in my app with vertical bounce enabled. I need the bounce at the bottom of the screen but not enabled at the top of the screen.

I no how to detect scrollview with the following:

  (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {

  // no bounce if scrollView has reached the top of the screen ??
  }

Answer 1

Try setting the bounces property as the scroll view scrolls, based on the content offset:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    scrollView.bounces = (scrollView.contentOffset.y > 100);
}

Answer 2

SWIFT

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    //disable bounce only at the top of the screen
    scrollView.bounces = scrollView.contentOffset.y > 100
}