触屏touch 手机端的操作手势

http://blog.csdn.net/wangjiaohome/article/details/49364177
基本事件:
touchstart //手指刚接触屏幕时触发
touchmove //手指在屏幕上移动时触发
touchend //手指从屏幕上移开时触发
touchcancel //触摸过程被系统取消时触发(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>

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