最近在做微信开发，要实现微信公众号改版—-改成微官网形式，即移动web页面中实现公众号的主页面，包括了公众号的菜单在底部显示
本文针对仿公众号底部菜单这个功能实现进行总结。实现采用html和css、JavaScript。
html页面实现了布局方式：
<!DOCTYPE html">
<html>
<head>
<title>New Document</title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<link rel="stylesheet" type="text/css" href="menu.css" media="all">
</head>
<script>
var nav4 = (function() {
bindClick = function(els, mask) {
if (!els || !els.length) {
return;
}
var isMobile = "ontouchstart" in window;
for ( var i = 0, ci; ci = els[i]; i++) {
ci.addEventListener("click", evtFn, false);
} function evtFn(evt, ci) {
ci = this;
for ( var j = 0, cj; cj = els[j]; j++) {
if (cj != ci) {
console.log(cj);
cj.classList.remove("on");
}
}
if (ci == mask) {
mask.classList.remove("on");
return;
}
switch (evt.type) {
case "click":
var on = ci.classList.toggle("on");
mask.classList[on ? "add" : "remove"]("on");
break;
}
}
mask.addEventListener(isMobile ? "touchstart" : "click", evtFn,
false);
};
return {
"bindClick" : bindClick
};
})();
</script>
<body>
<div class="bg">
<img src="home-default17.jpg" width="100%" height="100%;">
</div>
<div data-role="widget" data-widget="nav4" class="nav4">
<nav>
<div id="nav4_ul" class="nav_4">
<ul class="box">
<li>
<a href=""><span>我的卡通</span></a>
</li>
<li>
<a href=""><span>通通精彩</span></a>
</li>
<li>
<a href="javascript:;"><span>贴心服务</span></a>
<dl>
<dt>
<a href="http://3g.weimob.com"><span>贴心服务</span></a>
</dt>
<dt>
<a href=""><span>网点查询</span></a>
</dt>
<dt>
<a href="#"><span>集团服务</span></a>
</dt>
<dt>
<a href=""><span>线路查询</span></a>
</dt>
</dl>
</li>
</ul>
</div>
</nav>
<script type="text/javascript">
nav4.bindClick(document.getElementById("nav4_ul").querySelectorAll("li>a"), document.getElementById("nav4_masklayer"));
</script>
</div> </body></html>
css实现控制样式和布局：
*{padding:0; margin:0;}
.bg {
position: absolute;
z-index: -1;
top: 0;
left: 0;
right: 0;
bottom: 0;
opacity: 0.8;
}
ul, ol, li, dl {
list-style-type: none;
}
.box {
width: 100%;
display: -webkit-box;
display: -moz-box;
-webkit-box-orient: horizontal;
-moz-box-orient: horizontal;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
}
.box > * {
-webkit-box-flex: 1;
-moz-box-flex: 1;
}
a:link, a:visited {
color: #575757;
text-decoration: none;
}
a {
text-decoration: none;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0.35);
}
a:link, a:visited {
color: #575757;
text-decoration: none;
}
a {
text-decoration: none;
-webkit-tap-highlight-color: rgba(0, 0, 0, 0.35);
}
.nav4{
height:45px;
}
.nav4 ul{
position:fixed;
z-index:200;
bottom:0;
left:0;
width:100%
}
.nav4 li{
border:1px solid rgba(190,190,190,1);
height:45px;
border-bottom:0;
border-right:0;
position:relative;
-webkit-box-shadow:inset 0 0 3px #fff;
}
.nav4 li:nth-of-type(1){border-left;0;}
.nav4 li>a{
font-size:15px;
-webkit-box-sizing:border-box;
box-sizing:border-box;
/*border:1px solid #f9f8f9;*/
-webkit-tap-highlight-color:rgba(0,0,0,0);
border-bottom:0;
display:block;
line-height:45px;
text-align:center;
background:-webkit-gradient(linear, 0 0, 0 100%, from(#f1f1f1), to(#dcdcdc), color-stop(35% ,#ededed), color-stop(50%, #e3e3e3) );
}
.nav4 li>a:only-child span{
background:none;
padding-left:0;
}
.nav4 li>a.on + dl{
display: block;
}
.nav4 li>a span{
color: #4f4d4f;
display: inline-block;
padding-left: 15px;
background: url(1.svg#2) no-repeat 4px 18px;
-webkit-background-size: 9px auto;
text-shadow:0px 1px 0px #ffffff;
}
/***********************/
.nav4 dl{
display:none;
position:absolute;
z-index:220;
bottom:60px;
left:50%;
width:100px;
margin-left:-50px;
background:red;
/*min-height:100px;*/
background:#e4e3e2;
/*border:1px solid #afaeaf;*/
border-radius:5px;
-webkit-box-shadow:inset 0 0 3px #fff;
background:url(2.svg#3) no-repeat center center;
-webkit-background-size:100%;
background-size:100%;
}
/*, .nav4 dl:after*/
.nav4 dl:before{
content:"";
display:inline-block;
position:absolute;
z-index:240;
bottom:0;
left:50%;
/*width:0;
height:0;
border:8px solid red;
border-color:#afaeaf transparent transparent transparent;
margin-left:-8px;
margin-bottom:-16px;*/
width:10px;
height:8px;
background: url(1.svg#2) no-repeat center -55px;
-webkit-background-size: 10px auto;
bottom: -7px;
margin-left: -5px;
}
/*.nav4 dl:after{
z-index:241;
border-color:#e4e3e2 transparent transparent transparent;
margin-bottom:-15px;
}*/
.nav4 dl dd{
line-height:45px;
text-align:center;
background:-webkit-gradient(linear, 0 0, 100% 0, from(rgba(194,194,194,0.8)), to(rgba(194,194,194,0.8)), color-stop(50%, rgba(194,194,194,0.8)));
background-size:80% 1px;
background-repeat:no-repeat;
background-position: center bottom;
/*background: url(3.svg#4) no-repeat center bottom;
-webkit-background-size:100px 1px;*/
}
.nav4 dl dd:last-of-type{
background:none;
}
.nav4 dl dd a{
font-size: 15px;
display:block;
color:#4f4d4f;
text-shadow:0px 1px 0px #ffffff;
white-space: pre;
overflow: hidden;
text-overflow: ellipsis;
}
.nav4 .masklayer_div{
display: none;
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 180;
background: rgba(0,0,0,0);
}
.nav4 .masklayer_div.on{display: block;}
.nav_4 ul{
list-style-type:none;
margin:0px;
padding:0;
}
.nav_4 ul li {
border: 1px solid rgba(190,190,190,1);
height: 45px;
width:33%;
border-bottom: 0;
border-right: 0;
position: relative;
float:left;
-webkit-box-shadow: inset 0 0 3px #fff;
}
.nav_4 dl {
display: none;
position: absolute;
z-index: 220;
bottom: 60px;
left: 50%;
width: 100px;
margin-left: -50px;
border-radius: 5px; /* 圆角边框 */
}
.nav_4 dl dt{
border:1px;
line-height: 45px;
text-align: center;
background: -webkit-gradient(linear, 0 0, 100% 0, from(rgba(194,194,194,0.8)), to(rgba(194,194,194,0.8)), color-stop(50%, rgba(194,194,194,0.8)));
background-size: 80% 1px;
background-repeat: no-repeat;
background-position: center bottom;
}
.nav_4 dl dt a{
font-size: 15px;
display: block;
color: #4f4d4f;
text-shadow: 0px 1px 0px #ffffff;
white-space: pre;
overflow: hidden;
text-overflow: ellipsis;
}
最后效果：
