带有“圆形"的 UIScrollView滚动

I've implemented this method, but it requires paging enabled. Lets assume you have five elements A,B,C,D and E. When you set up your view, you add the last element to the beginning and the first element to the end, and adjust the content offset to view the first element, like this E,[A],B,C,D,E,A. In the UIScrollViewDelegate, check if the user reach any of the ends, and move the offset without animation to the other end.

想象一下 [ ] 表示正在显示的视图:

Imagine the [ ] indicates the view being shown:

E,A,B,C,[D],E,A

用户向右滑动

E,A,B,C,D,[E],A

用户向右滑动

E,A,B,C,D,E,[A]

然后，自动设置内容偏移到第二个元素

Then, automatically set the content offset to the second element

E,[A],B,C,D,E,A

通过这种方式，用户可以双向滑动创建无限滚动的错觉.

This way the user can swipe both ways creating the illusion of an infinite scroll.

E,A,[B],C,D,E,A

更新

我已经上传了该算法的完整实现.这是一个非常复杂的类，因为它还具有点击选择、无限循环滚动和单元格重用.您可以按原样使用代码，修改它或提取您需要的代码.最有趣的代码在 TCHorizo​​ntalSelectorView 类中.

Update

I've uploaded a complete implementation of this algorithm. It's a very complicated class, because it also has on-click selection, infinite circular scroll and cell reuse. You can use the code as is, modify it or extract the code that you need. The most interesting code is in the class TCHorizontalSelectorView.

文件链接

尽情享受吧！

UICollectionView 现在是实现此目的的推荐方法，它可用于获得完全相同的行为.本教程详细描述了如何去实现它.

UICollectionView is now the recommended way to achieve this and it can be used to obtain the very same behavior. This tutorial describes in details how to achieve it.

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