你将如何在 react-native 中实现双指缩放? [英] How would you implement pinch-zoom in react-native?

问题描述

我一直在研究 PanResponder.我目前的工作假设是，我会检测是否有两个向外移动的触摸，如果是，则增加 onPanResponderMove 函数中的元素大小.

I've been looking into PanResponder. My current working hypothesis is that I would detect if there are two touches that are moving outwards and if so, increase the element size in the onPanResponderMove function.

这似乎是一种凌乱的方式.有没有更顺畅的方法?

This seems like a messy way to do it. Is there a smoother way?

推荐答案

如果您只需要简单的双指缩放功能，只需使用 ScrollView (文档在这里)

If you need only simple pinch zoom functionality just use ScrollView (doc here)

只需根据需要提供 ma​​ximumZoomScale(大于 1)和 minimumZoomScale.

Just give maximumZoomScale (greater than one) and minimumZoomScale as you wish.

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