移动开发滑动隐藏导航条功能

window.addEventListener('touchmove',function(e) {

if(e.targetTouches[0].pageY<windowTop){

if(e.targetTouches[0].pageY>50)
{
$('.shop_top').css('display','none');
$('.shop_second').css('display','none');
}
windowTop=e.targetTouches[0].pageY;
}
else if(e.targetTouches[0].pageY>windowTop){
if($('.shop_top').css('display')=='block')
{
windowTop=e.targetTouches[0].pageY;
return;
}
$('.shop_top').css('display','block');
$('.shop_second').css('display','block');
windowTop=e.targetTouches[0].pageY;

$('.swiper-container1').css('height',$(window).height()-$('.shop_three').height()-$('.swiper-container2').height());
$('.swiper-container1').css('overflow','scroll');

}