解决移动端 footer fixd 定位被键盘顶起来的方案

直接上代码：

$(document).ready(function () {
　　var u = navigator.userAgent;
　　var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1; //android终端
　　var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端
　　var h=$(window).height(); //获取窗口高度
　　$(window).resize(function() { //检测窗口高度变化
　　if($(window).height()<h){ //判断
　　　　$('#footer').hide();
　　}
　　if($(window).height()>=h){
　　　　if(isAndroid){
　　　　$('#footer').show();
　　　　$("input").blur();
　　}else if(isiOS){

　　　　$('#footer').show();
　　}
}

});
});

---------------------------------

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<meta content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no,minimal-ui" name="viewport"/>

<title>解决ios 微信 input 获取焦点时fixed失效 | 方法1 -幸凡学习网</title>

<style>

html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video{margin:0;padding:0;border:0;vertical-align:baseline;}

article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block;}

body,html{color:#333;}

html{font-size:20px;}

h1,h2,h3,h4,h5,h6,h7{font-size:16px;font-weight:normal;}

b{font-weight:normal;}

ol,ul{list-style:none;}

blockquote,q{quotes:none;}

blockquote:before,blockquote:after,q:before,q:after{content:''content:none;}

input,textarea{outline:0;resize:none;padding:0;}

body,html,input,textarea,select{font-family:"Microsoft YaHei",Arial,Helvetica,sans-serif;}

select{appearance:none;-moz-appearance:none; /* Firefox */-webkit-appearance:none; /* Safari 和 Chrome */font-size:14px;background:url(../images/arrow_dowm2_ico.png) no-repeat right center;background-size:18px auto;}

i,em,b{font-style:normal;font-weight:normal;}

body{background:#eee;font-size:0.7rem;}

.clearfix:after{content:'.'height:0;display:block;clear:both;visibility:hidden;}

.clearfix{*zoom:1;}

a,a:hover,a:active,a:visited{text-decoration:none;color:#333;}

.header{position:fixed;height:40px;line-height:40px;padding:10px 0;left:0;top:0;width:100%;background:#fff;z-index:3;}

.header .search_txt{margin-left:10px;margin-right:90px;border:1px solid #e6e6e6;padding:0 10px;background:#fafafa;}

.header .search_txt input{width:100%;border:none;height:38px;line-height:38px;background:none;}

.header .search_submit{position:absolute;right:10px;top:10px;width:70px;height:40px;}

.header .search_submit input{height:40px;width:70px;border:none;background:#f60;color:#fff;}

.h60{display:block;height:60px;}

.item{margin-top:10px;}

.item p{height:40px;line-height:40px;padding:0 10px;border-bottom:1px solid #e6e6e6;background:#fff;}

</style>

</head>

<body>

<!-- 防止重叠-->

<div class="h60"></div>

<!-- 置顶搜索框 -->

<div class="header">

    <div class="search_txt"><input type="text" placeholder="请输入你要搜索的内容" /></div>

    <div class="search_submit"><input type="submit" value="搜索" /></div>

</div>

<!-- 数据容器 -->

<div class="item">

</div>

<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>

<script>

var scrollh=0;//保存滚动条的位置

$(function(){

    //填充数据

    var itemhtml="";

    for(var i=0;i<50;i++)

    {

        itemhtml+="<p>我是第"+  parseInt(i+1)+"条数据</p>";

    }

    $(".item").html(itemhtml);

    //判断是ios终端 才执行这个下面的FIXED

    var u = navigator.userAgent;

    var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端

    if(isiOS)

    {

        $(".header .search_txt input").focus(function(e){

            $(".header").css({"position":"relative","margin-top":"-60px"});

            scrollh=$(window).scrollTop();

            $("body").scrollTop(0);

            $("body").css("overflow","hidden");

            $('body').bind("touchmove",function(e){

              e.preventDefault();

            });

        });

        $(".header .search_txt input").blur(function(e){

            $(".header").removeAttr("style");

            $("body").css("overflow","auto");

            $('body').bind("touchmove",function(e){

                $("body").unbind("touchmove");

            });

            $("body").scrollTop(scrollh);

        });

    }

});

 </script>

</body>

</html>

---------------------第二种------------------------------

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<meta content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no,minimal-ui" name="viewport"/>

<title>解决ios 微信 input 获取焦点时fixed失效 | 方法2 -幸凡学习网</title>

<style>

html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video{margin:0;padding:0;border:0;vertical-align:baseline;}

article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block;}

body,html{color:#333;}

html{font-size:20px;}

h1,h2,h3,h4,h5,h6,h7{font-size:16px;font-weight:normal;}

b{font-weight:normal;}

ol,ul{list-style:none;}

blockquote,q{quotes:none;}

blockquote:before,blockquote:after,q:before,q:after{content:''content:none;}

input,textarea{outline:0;resize:none;padding:0;}

body,html,input,textarea,select{font-family:"Microsoft YaHei",Arial,Helvetica,sans-serif;}

select{appearance:none;-moz-appearance:none; /* Firefox */-webkit-appearance:none; /* Safari 和 Chrome */font-size:14px;background:url(../images/arrow_dowm2_ico.png) no-repeat right center;background-size:18px auto;}

i,em,b{font-style:normal;font-weight:normal;}

body{background:#eee;font-size:0.7rem;}

.clearfix:after{content:'.'height:0;display:block;clear:both;visibility:hidden;}

.clearfix{*zoom:1;}

a,a:hover,a:active,a:visited{text-decoration:none;color:#333;}

.header{position:fixed;height:40px;line-height:40px;padding:10px 0;left:0;top:0;width:100%;background:#fff;z-index:3;}

.header .search_txt{margin-left:10px;margin-right:90px;border:1px solid #e6e6e6;padding:0 10px;background:#fafafa;}

.header .search_txt input{width:100%;border:none;height:38px;line-height:38px;background:none;}

.header .search_submit{position:absolute;right:10px;top:10px;width:70px;height:40px;}

.header .search_submit input{height:40px;width:70px;border:none;background:#f60;color:#fff;}

.item{position:absolute;top:70px;left:0;right:0;bottom:0;

    /* 使之可以滚动 */

    overflow-y: scroll;

    /* 增加该属性，可以增加弹性 */

    -webkit-overflow-scrolling: touch;

}

.item p{height:40px;line-height:40px;padding:0 10px;border-bottom:1px solid #e6e6e6;background:#fff;}

</style>

</head>

<body>

<!-- 置顶搜索框 -->

<div class="header">

    <div class="search_txt"><input type="text" placeholder="请输入你要搜索的内容" /></div>

    <div class="search_submit"><input type="submit" value="搜索" /></div>

</div>

<!-- 数据容器 -->

<div class="item">

</div>

<script src="http://code.jquery.com/jquery-2.1.1.min.js"></script>

<script>

var scrollh=0;//保存滚动条的位置

$(function(){

    //填充数据

    var itemhtml="";

    for(var i=0;i<50;i++)

    {

        itemhtml+="<p>我是第"+  parseInt(i+1)+"条数据</p>";

    }

    $(".item").html(itemhtml);

});

 </script>

</body>

</html>

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解决移动端 footer fixd 定位被键盘顶起来的方案

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