问题描述
我有一个 UIScrollView，我希望它能够双向滚动(目前可以)，但一次只能滚动一个.因此，例如，如果您开始水平滚动它，它根本不会垂直移动，直到您松开并开始垂直移动它.我该怎么做呢?
I have a UIScrollView and I want it to be able to scroll in both directions (it currently does) but only one at a time. So, for instance, if you start scrolling it horizontally, it won't move vertically at all until you let go and start moving it vertically. How could I go about doing this?
推荐答案
将 directionalLockEnabled 属性设置为 YES.来自 Apple 文档:
Set the directionalLockEnabled property to YES. From the Apple docs:
如果此属性为 NO，则允许在水平和垂直方向上滚动.如果此属性为 YES 并且用户开始沿一个大致方向(水平或垂直)拖动，则滚动视图将禁用在另一个方向上的滚动.如果拖动方向是对角线，则滚动不会被锁定，用户可以向任意方向拖动，直到拖动完成.默认值为否
If this property is NO, scrolling is permitted in both horizontal and vertical directions. If this property is YES and the user begins dragging in one general direction (horizontally or vertically), the scroll view disables scrolling in the other direction. If the drag direction is diagonal, then scrolling will not be locked and the user can drag in any direction until the drag completes. The default value is NO
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