var dd = $(".drag_bott").removeAttr('id').last().attr('id','drag_bott');
var drag = document.getElementById("drag_bott");
function moveButton(){
obj = this;
var intX = event.targetTouches[0].pageX;//点击的X坐标
var intY = event.targetTouches[0].pageY;//点击的Y坐标
var right = $(obj).css('left');
var bottom = $(obj).css('bottom');
obj.addEventListener('touchmove', function(){
event.preventDefault();
var moveX = event.targetTouches[0].pageX;//动态获取鼠的X坐标
var moveY = event.targetTouches[0].pageY;//动态获取鼠的Y坐标
var disX = intX-moveX;//差值
var disY = moveY-intY;//差值
var movX = parseInt(right)-disX+'px';//目标right值
var movY = parseInt(bottom)-disY+'px';//目标bottom值
$(obj).css('left',movX);
$(obj).css('bottom',movY);
});
};
drag.addEventListener('touchstart',moveButton,false);
var dd = $(".drag_bott").removeAttr('id').last().
阅读背景：
js 实现滑块效果
来源：互联网
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