var div=document.querySelector("div");
        var startX,startY,moveX,moveY,distanceX,distanceY;
        // 開始觸控
        div.addEventListener("touchstart",function(e){
            startX=e.targetTouches[0].clientX;
            startY=e.targetTouches[0].clientY;

        })
        // 觸控滑動 持續觸發
        div.addEventListener("touchmove",function(e){
            moveX=e.targetTouches[0].clientX;
            moveY=e.targetTouches[0].clientY;
            distanceX=moveX-startX;
            distanceY=moveY-startY;
            div.style.transform="translate("+distanceX+"px,"+distanceY+"px)";
        });
        // 觸控結束
        div.addEventListener("touchend",function(e){

        })