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响应JavaScript中的单个触摸事件

[英]Respond to individual touch events in javascript

原文 2012-08-06 15:30:15 5 1 javascript/ iphone/ webkit

Consider the scenario where a user touches the screen, holding the first finger down. 考虑用户触摸屏幕并按住第一根手指的情况。 The user then taps the screen sequentially in two separate locations with a second finger. 然后，用户用第二根手指在两个单独的位置依次点按屏幕。 I want to respond to this as three independent taps, and all I really care about are the initial tap locations. 我想用三个独立的水龙头来回应这个问题，我真正关心的只是最初的水龙头位置。

I have tried using touchstart, but I can't figure out how to not reuse the first touch. 我尝试使用touchstart，但是我不知道如何不重用第一次触摸。 If I look for changes in the length of event.touches, I don't pick up the second (final) tap. 如果我想更改event.touches的长度，则不会拿起第二个（最终）拍子。

Can someone suggest a strategy for responding to each touch individually? 有人可以提出一种策略来单独响应每个触摸吗？ I am guessing it is quite simple, but I can't quite figure it out. 我猜这很简单，但我不太清楚。

1 个解决方案

If you're using JQuery or Zepto JQTouch is a good plugin that wraps up touch events nicely for you. 如果您使用的是JQuery或Zepto，则JQTouch是一个很好的插件，可以很好地包装触摸事件。 If you're interested in doing this at a lower level, you could always take a look at how they've done it. 如果您对较低级别的操作感兴趣，可以随时查看他们的操作方式。