gistfile1.m

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    CGFloat maxY = scrollView.contentSize.height+scrollView.contentInset.bottom;
    CGFloat botY = scrollView.contentOffset.y+scrollView.frame.size.height;
    NSLog(@"y = %f, maxY = %f", botY, maxY);
    
    if(botY >= maxY) {
        // load next page
    } 
}