UIButton传递到UIScrollView的直击式滚动手势 [英] UIButton pass-through tap-and-scroll gesture to UIScrollView

问题描述

我有一个水平分页的 UIScrollView 和一个 UIButton 部分覆盖了滚动视图。

I have a horizontal paginated UIScrollView with a UIButton partially covering the scroll view.

就像这样：

UIView
|
|- UIScrollView
|
|- UIButton

我要制作 UIButton 不会在 tap-scroll-and-relase-above-the-button 上触发（我希望 UIScrollView 滚动）。我希望按钮仅响应轻按并释放，而不会移动。

I want to make the UIButton to not trigger on tap-scroll-and-relase-above-the-button (I want the UIScrollView to scroll instead). I want the button to only respond to tap-and-release-without-moving.

可以轻松，快速地完成此操作吗？还是应该将 UIButton 子类化并覆盖 -touchesBegan：等，以将触摸手动传递给 scrollView 在适当的时候？

Can this easy and quickly done? Or should I subclass the UIButton and override -touchesBegan:, etc., to manually pass the touches to the scrollView when appropriate?

推荐答案

经过一些额外的研究，我找到了一个合理的解决方案。这里的问题是 UIScrollView 和 UIButton 不在同一响应者链层次结构中：两者的下一个响应者是父 UIView ，因此默认情况下它们不会相互发送事件。

After some additional research I found a reasonable solution. The problem here is that UIScrollView and UIButton are not in the same responder-chain hierarchy: the next responder for both is the parent UIView, so they don't send events to each other by default.

解决方案是子类 UIButton 并实现

- (UIResponder *)nextResponder

方法，以便它返回 UIScrollView 。

另一种解决方案是使 UIButton 成为<$的子代c $ c> UIScrollView 。但是，如果无论单元格滚动如何都希望将按钮保持在固定位置，那将无法正常工作。

An alternate solution is to make the UIButton a child of the UIScrollView. However, that doesn't work great if you want to keep the button at a fixed position regardless of cell scrolling.

令人烦恼的是，没有更简单的方法可以做到这一点。 ：-）

It's somewhat annoying that there's no simpler way of doing this. :-)

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