关于苹果手机中，微信浏览器下拉弹动的解决

/*ios微信浏览器上下滚动兼容性问题解决 end*/$(function () {//DOM文档加载完执行    wxScrollSolve(document.querySelector('.MainCon'));});function wxScrollSolve(scrollWrapObj) {//Scrollobj要滚动的内容外部包裹的容器对象    if(scrollWrapObj==""||scrollWrapObj==undefined||scrollWrapObj==null){        return    }    var overscroll = function (el) {        el.addEventListener('touchstart', function () {            var top = el.scrollTop                , totalScroll = el.scrollHeight                , currentScroll = top + el.offsetHeight;            if (top === 0) {                el.scrollTop = 1;            } else if (currentScroll === totalScroll) {                el.scrollTop = top - 1;            }        });        el.addEventListener('touchmove', function (evt) {            if (el.offsetHeight < el.scrollHeight)                evt._isScroller = true;        })    };    overscroll(scrollWrapObj);    /*document.querySelector('.MainCon')*/    document.body.addEventListener('touchmove', function (evt) {        if (!evt._isScroller) {            evt.preventDefault();        }    });}/*ios微信浏览器上下滚动兼容性问题解决 end*/