微信页面弹出键盘后iframe内容变空白的解决方案

//整体高
var win = $(window).height();
//搜索栏
var header = $('header').height();
//导航栏
var nav = $('.navdivwrap').height();
//页底
var footer = $('footer').height();
//iframe
$('#main').height(win -header + nav - footer);

//导入
<script src="jquery.cookie.js"></script>
var win = $(window).height();
//获取cookie里
var winCookie = $.cookie("win1",{path: '/' });
//若cookie里无，则填充；若cookie里有，则取出
if(!winCookie){
 $.cookie("win1", win,{path: '/' });
}else{
 win = winCookie;
}