iOS判断滚动

- (void)scrollViewDidScroll:(UIScrollView *)aScrollView {

CGPoint offset = aScrollView.contentOffset;

CGRect bounds = aScrollView.bounds;

CGSize size = aScrollView.contentSize;

UIEdgeInsets inset = aScrollView.contentInset;

float y = offset.y + bounds.size.height - inset.bottom;

 float h = size.height;

// NSLog(@"offset: %f", offset.y);

// NSLog(@"content.height: %f", size.height);

// NSLog(@"bounds.height: %f", bounds.size.height);

// NSLog(@"inset.top: %f", inset.top);

// NSLog(@"inset.bottom: %f", inset.bottom);

// NSLog(@"pos: %f of %f", y, h);

float reload_distance = 10;

if(y > h + reload_distance) {

        NSLog(@"load more rows");

}

}