有一个简单的方法使水平分页的UIScrollView包围？ [英] Is there an easy way to make a horizontally paged UIScrollView wrap around?

问题描述

可能重复：

UIScrollView。关于实现无限的任何想法滚动/缩放？

我注意到在股票应用程序中，小图绕回，例如：当您到达滚动视图的结尾并再次向右滑动时，您回到开始。在我开始编写代码之前，有没有一个简单的方法来做到这一点在SDK？我找不到任何属性或方法来实现这一点？

I notice that in the stocks application, the small graph wraps around, eg: when you get to the end of the scroll view and swipe right again, you go back to the beginning. Before I go ahead and code this myself is there an easy way to do this in the SDK? I can't find any properties or methods that would enable that?

我有一个分页的UIScrollView水平滚动，几乎完全像股票应用程序。 p>

I have a paged UIScrollView that scrolls horizontally, pretty much exactly like the stocks application one does.

推荐答案

我不认为有一个属性。我伪造它通过在每一端添加一个额外的页面，所以对于5页UIScrollView您可以设置contentSize为7页，并加载它们像这样：

I don't think there's a property to do this. I've faked it by adding an extra page on each end, so with for a 5 page UIScrollView you'd set the contentSize for 7 pages and load them like this:

5 1 2 3 4 5 1

5 1 2 3 4 5 1

然后在scrollViewDidEndDecelerating：中检查你是否在任一端，如果是这样，调用scrollRectToVisible：animated：在你的UIScrollView上跳转到真实页面1或5的位置（无动画）。

Then in scrollViewDidEndDecelerating:, check if you're at either end and if so call scrollRectToVisible:animated: on your UIScrollView to jump it to the "real" page 1 or 5 position (without animation).

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