解决微信下拉

var wrapper = document.getElementById("wrapper");

// wrapper.style.marginTop = window.innerHeight > 480 ? "19%" : "16%";

var myScroll = new iScroll('wrapper',{vScrollbar:false,hScroll:false,fixedScrollbar:true,checkDOMChanges:true});

document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false);