双向无限 UIScrollView [英] Infinite UIScrollView in both direction

问题描述

我想创建一个无限滚动视图(如老虎机)，但没有分页.当用户向下滚动时，很容易我只需要增加 contentSize 和 scrollView 无休止地滚动:

I would like to create an infinite scrollView (like a slot machine), but without paging. When the user scrolls down, it's easy i just have to increase the contentSize and the scrollView scroll endlessly :

- (void)scrollViewDidScroll:(UIScrollView *)theScrollView {
   theScrollView.contentSize = CGSizeMake(45, theScrollView.contentSize.height+45);
}

但是当用户向上滚动时，我如何创建相同的效果?我尝试使用 contentInset 但随后 contentOfsset 没有更新，我最终出现了奇怪的行为.

But how can i create the same effect when the user scrolls upward ? I tried to play with the contentInset but then the contentOfsset doesn't get updated and i end up having weird behaviour.

你知道我是怎么做到的吗?

Do you have any idea how i could achieve that ?

推荐答案

我需要同样的，所以我创建了这个:http://dev.doukasd.com/2011/04/infinite-scrolling-dial-control-for-ios/

I needed the same, so I created this: http://dev.doukasd.com/2011/04/infinite-scrolling-dial-control-for-ios/

看看视频，我相信这就是你要找的.包含源代码.

Have a look at the video, I believe it's what you're looking for. Source code is included.

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