http://blog.csdn.net/wangjiaohome/article/details/49364177
基本事件：
touchstart //手指剛接觸屏幕時觸發(fā)
touchmove //手指在屏幕上移動時觸發(fā)
touchend //手指從屏幕上移開時觸發(fā)
touchcancel //觸摸過程被系統(tǒng)取消時觸發(fā)（少用）
<div id="box"></div>
<script>
var box = document.querySelector("#box");
box.addEventListener("touchstart", function(en){
//console.log("touchstart");
console.log(en);
console.log(en.targetTouches);
}, false)
box.addEventListener("touchend", function(){
console.log("touchend");
}, false)
box.addEventListener("touchmove", function(){
console.log("touchmove");
}, false)
</script>
