$('.ruler ul').on("touchstart",function(e){
startY = e.originalEvent.changedTouches[0].pageY;
}
$('.ruler ul').on("touchmove",function(e){
moveY= e.originalEvent.changedTouches[0].pageY;
}
Y = moveY - startY;
var scroll_offset = $('body,html').offset();
if(Y<0){
myscrollTop = $(window).scrollTop();
$('body').animate({
scrollTop:myscrollTop-Y+'px' //让body的scrollTop等于pos的top,就实现了滚动
},0);
console.log(myscrollTop)
}else{
myscrollTop = $(window).scrollTop();
$('body').animate({
scrollTop:myscrollTop-Y+'px' //让body的scrollTop等于pos的top,就实现了滚动
},0);
}