iOS-CALayer和手势/滑动识别器 [英] iOS - CALayer and Gesture/Swipe Recognizer

问题描述

我在视图中添加了一层以创建渐变背景色，但是我需要在视图中使用 UISwipeGestureRecognizer 。问题在于，现在，对于图层，滑动识别器不起作用！我能怎么做？？我可以将滑动识别器添加到图层吗？
谢谢。

I added a layer to my view to create gradient background color, but I need to use UISwipeGestureRecognizer in my view. The problem is that now, with the layer, the swipe recognizer doesn't work! How can I do?? Can I add a swipe recognizer to a layer? Thanks.

推荐答案

CALayer 及其子代不会支持 UIGestureRecognizer ，只有 UIView 支持。这意味着您必须将手势识别器附加到某些封闭视图并调用-[CALayer hitTest：] 或-[CALayer pointInside：] 来查看被哪个层击中特定的触摸或事件。

CALayer and its children do not support UIGestureRecognizer's, only UIView does. This means that you must attach gesture recognizers to some enclosing view and call -[CALayer hitTest:], or -[CALayer pointInside:] to see which layer has been hit by a particular touch or event.

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