+You need to do something like:
//Scroll Up:
-(IBAction)scrollContentUp:(id)sender {
if(_webView.scrollView.contentOffset.y - 40 >= 0) {
[_viewWeb.scrollView setContentOffset:CGPointMake(0,
_viewWeb.scrollView.contentOffset.y - 40.0)
animated:YES];
}
}
//Scroll down:
-(IBAction)scrollContentDown:(id)sender {
if(_webView.scrollView.contentOffset.y + _webView.frame.size.height + 40 <= _viewWeb.scrollView.contentSize.height ) {
[_viewWeb.scrollView setContentOffset:CGPointMake(0,
_viewWeb.scrollView.contentOffset.y + 40.0)
animated:YES];
}
}