确定触摸移动的垂直方向 [英] Determine vertical direction of a touchmove

问题描述

我正在尝试为平板电脑实现一个触摸监听器来触发一些动作，具体取决于触摸是向上还是向下移动.

i'm trying to implement a touch listener for tablets to trigger some actions depending whether it touchmoved upwards or downwards.

我尝试了本地监听器:

($document).bind('touchmove', function (e)
{
    alert("it worked but i don't know the direction");
});

但我不知道如何确定方向.

But i don't know how to determine the direction.

这可能吗?

或者我是否需要使用touchstart/touchend，如果我需要这个，我可以在触摸移动停止之前确定方向吗?

Or do i need to use touchstart/touchend, if I need this can I determine the direction before the touch movement stops?

如果我只能使用外部库来做到这一点，最好的方法是什么?

If I can only do this with an external library, what's the best one?

谢谢.

推荐答案

我在 Ipad 中遇到了一些问题，通过两个事件解决了

I had some issues in Ipad and solved it with two events

var ts;
$(document).bind('touchstart', function (e){
   ts = e.originalEvent.touches[0].clientY;
});

$(document).bind('touchend', function (e){
   var te = e.originalEvent.changedTouches[0].clientY;
   if(ts > te+5){
      slide_down();
   }else if(ts < te-5){
      slide_up();
   }
});

这篇关于确定触摸移动的垂直方向的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！