两个滚动视图工作同时一触即可 [英] Two scroll view work Simultaneous with one touch

问题描述

我正在处理它的应用程序我必须同时使用两个滚动视图同步。这意味着如果我同时滚动一个滚动视图，则另一个滚动视图必须滚动它。

I am working on application in it I have to work with two scroll view Simultaneous in one touch. It means if I scroll one scroll view at same time another scroll view must scroll with it.

如果可以，那么怎么办呢？

If this is possible then how can it be done?

推荐答案

在包含两个滚动视图的视图控制器中实现UIScrollViewDelegate协议。在：

Implement the UIScrollViewDelegate protocol in the view controller containing both scroll views. In the:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

委托方法，获取内容偏移量：

delegate method, get the content offset:

CGPoint offset = [scrollViewA contentOffset]; // or scrollViewB

然后将另一个控件设置为：

Then set the other control with:

- (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated

您可以通过在上面的委托方法中进行比较来确定要更改哪一个：

You can determine which one to change by comparing in the delegate method above:

if( scrollView == scrollViewA ) // change offset of B
else // change offset of A

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