如何防止传递给UIView的superview的触摸事件？ [英] how to prevent a touch event passed to a UIView's superview?

问题描述

我制作了一个包含可以拖动以在屏幕上移动的图片的程序。
我也使用UIScrollView，因为空间比窗口大。
我将UIView子类化为图片视图以显示此类中的图片和处理触摸。
图片视图作为子视图添加到scrollView。
但现在我有一个问题：
当我拖动图片，scrollView随图片一起移动。
我想知道是否有一种方法来消耗图片类中的触摸，以防止它们传递给superview。

I've made a program which contains pictures that can be dragged to move on the screen. also I used UIScrollView since the space is larger than the window. I subclassed UIView as a pictures view to display the picture and handle touches in this class. picture views are added as subviews to the scrollView. but now I have a problem: when I drag the picture, the scrollView moves together with the picture. I'm wondering if there is a way to consume the touches in the picture class to prevent them from passing to superview.

推荐答案

你应该把你的代码放在你的UIView的touchesMoved：withEvent：方法中。如果您的View将自己处理此事件，那么它不应该冒泡到superview

You should to put your code in "touchesMoved:withEvent:" method of your UIView. If your View will handle this event by yourself, then it should not bubble to superview

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