给一个元素绑定 touchstart, touchmove, touchend, click
如果只是触摸一下这个元素，按理是只触发 touchstart touchend click，如果滚动的话，应该就是多了一个 touchmove 而已
但是安卓机的某些浏览器（如 UC）在滚动的时候不会触发 touchend（偶尔也会触发），touchmove 可能也只是触发一次，见 demo
解决方法：
- 在
touchstart设置e.preventDefault()，页面不能滚动，链接不能跳转，不会触发click事件 - 在
touchmove设置e.preventDefault()，页面不能滚动以及不能pinch-room
Since calling preventDefault() on a touchstart or the first touchmove event of a series prevents the corresponding mouse events from firing, it’s common to call preventDefault() ontouchmove rather than touchstart. That way, mouse events can still fire and things like links will continue to work.
参考 Preventing the touch default
The default of all actions is prevented when you return false (or call preventDefault()) ontouchstart. The touchmove event is trickier: only scroll and pinch-zoom are prevented when you return false on that event.
Refer
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