扩展UIScrollView添加一个scrollToBottom方法:

extension UIScrollView {
    func scrollToBottom(animated:Bool) {
        let offset = self.contentSize.height - self.visibleSize.height
        if offset > self.contentOffset.y {
            self.setContentOffset(CGPoint(x: 0, y: offset), animated: animated)
        }
    }
}

CGFloat yOffset = scrollView.contentOffset.y;

CGFloat height = scrollView.frame.size.height;

CGFloat contentHeight = scrollView.contentSize.height;

CGFloat distance = (contentHeight  - height) - yOffset;

if(distance < 0)
{
    return ;
}

CGPoint offset = scrollView.contentOffset;

offset.y += distance;

[scrollView setContentOffset:offset animated:YES];

将内容偏移设置为内容大小的高度是错误的:它将内容的底部滚动到滚动视图的顶部，因此看不到。

正确的解决方案是滚动内容的底部到滚动视图的底部，就像这样(sv是UIScrollView):

CGSize csz = sv.contentSize;
CGSize bsz = sv.bounds.size;
if (sv.contentOffset.y + bsz.height > csz.height) {
    [sv setContentOffset:CGPointMake(sv.contentOffset.x, 
                                     csz.height - bsz.height) 
                animated:YES];
}

滚动到顶部

- CGPoint topOffset = CGPointMake(0, 0);
- [scrollView setContentOffset:topOffset animated:YES];

滚动到底部

- CGPoint bottomOffset = CGPointMake(0, scrollView.contentSize.height - self.scrollView.bounds.size.height);
 - [scrollView setContentOffset:bottomOffset animated:YES];

Valdyr，希望这对你有帮助

CGPoint bottomOffset = CGPointMake(0, [textView contentSize].height - textView.frame.size.height);

if (bottomOffset.y > 0)
 [textView setContentOffset: bottomOffset animated: YES];

对我没用，当我在UITableViewController上使用它时。tableView (iOS 4.1)，添加footerView后。它滚动出边界，显示黑屏。

可选择的解决方案:

 CGFloat height = self.tableView.contentSize.height; 

 [self.tableView setTableFooterView: myFooterView];
 [self.tableView reloadData];

 CGFloat delta = self.tableView.contentSize.height - height;
 CGPoint offset = [self.tableView contentOffset];
 offset.y += delta;

 [self.tableView setContentOffset: offset animated: YES];