-(void)scrollViewDidScroll:(UIScrollView *)scrollView{ CGPoint offset = scrollView.contentOffset; // 当前滚动位移 CGRect bounds = scrollView.bounds; // UIScrollView 可视高度 CGSize size = scrollView.contentSize; // 滚动区域 UIEdgeInsets inset = scrollView.contentInset; float y = offset.y + bounds.size.height - inset.bottom; float h = size.height; float reload_distance = 10; if (y > (h + reload_distance)) { [self requestProductList]; } }