我想创建一个简单的移动菜单，单击时会打开和关闭。我还希望它只显示父母而不是孩子猫，直到点击父母。
我四处研究并找到了这两个问题的好答案。但是，当结合起来时，我没有得到想要的结果。
具体来说，我正在使用的 jquery 切换依赖于将 nav ul 设置为“display:none”作为它们的起始状态，但这在某种程度上干扰了我的其他 jquery 函数来隐藏其父级是顶级 ul 类的元素。
一切都按预期工作，除了在菜单初始加载时没有显示任何子项的部分。但是，一旦我删除了最初完全隐藏我的 nav ul 的 css 行，那么子项就会被隐藏（当然，当我希望隐藏时，我的导航会在加载时展开。
我正在尝试解决的页面：[http://saks-jewelers.com/mobile-nav/mobile_nav.html#]
这是我的html代码和jquery：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Responsive Header Nav</title>
<meta name="description" content="Responsive Header Nav">
<meta name="author" content="Treehouse">
<meta name="viewport" content="width=device-width; initial-scale=1; maximum-scale=1">
<link rel="stylesheet" href="styles.css">
<!--[if IE]> <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script><![endif]-->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("#menu-icon").click(function(){
$("nav ul").toggle(200);
});
$('#nav>li>ul').each(function(){
if($(this).parent().hasClass("level0"))
{
$(this).hide();
} else {
$(this).show();
}
});
$('#nav>li').click(function(){
// check that the menu is not currently animated
if ($('#nav ul:animated').size() == 0) {
// create a reference to the active element (this)
// so we don't have to keep creating a jQuery object
$heading = $(this);
// create a reference to visible sibling elements
// so we don't have to keep creating a jQuery object
$expandedSiblings = $heading.siblings().find('ul:visible');
if ($expandedSiblings.size() > 0) {
$expandedSiblings.slideUp(200, function(){
$heading.find('ul').slideDown(200);
});
}
else {
$heading.find('ul').slideDown(200);
}
}
});
});
</script>
<body>
<header>
<a href="#" id="logo"></a>
<nav>
<a href="#" id="menu-icon"></a>
<ul id="nav">
<li class="level0 nav-1 first level-top parent">
<a href="#" class="level-top"><span>Rings</span></a>
<ul class="level0">
<li class="level1 nav-1-1 first"><a href="#" class=""><span>CZ Fashion</span></a></li>
<li class="level1 nav-1-2"><a href="#" class=""><span>Gemstone Fashion</span></a></li>
<li class="level1 nav-1-3"><a href="#" class=""><span>Silver & Gold Fashion</span></a></li>
<li class="level1 nav-1-4"><a href="#" class=""><span>Pearl</span></a></li>
<li class="level1 nav-1-5"><a href="#" class=""><span>Moissanite™</span></a></li>
<li class="level1 nav-1-6"><a href="#" class=""><span>Religious & Symbolic</span></a></li>
<li class="level1 nav-1-7"><a href="#" class=""><span>Youth</span></a></li>
<li class="level1 nav-1-8"><a href="#" class=""><span>Promise Rings</span></a></li>
<li class="level1 nav-1-9 last"><a href="#" class=""><span>Wedding</span></a></li>
</ul>
</li>
<li class="level0 nav-2 level-top parent"><a href="#" class="level-top"><span>Earrings</span></a>
<ul class="level0">
<li class="level1 nav-2-1 first"><a href="#" class=""><span>CZ Fashion</span></a></li>
<li class="level1 nav-2-2"><a href="#" class=""><span>Gemstone Fashion</span></a></li>
<li class="level1 nav-2-3"><a href="#" class=""><span>Silver & Gold Fashion</span></a></li>
<li class="level1 nav-2-4"><a href="#" class=""><span>Pearl</span></a></li>
<li class="level1 nav-2-5"><a href="#" class=""><span>Moissanite™</span></a></li>
<li class="level1 nav-2-6"><a href="#" class=""><span>Religious & Symbolic</span></a></li>
<li class="level1 nav-2-7 last"><a href="#" class=""><span>Youth</span></a></li>
</ul>
</li>
</ul>
</nav>
</header>
<section>
<img src="featured.png" alt="Respond" />
<h1>Respond to Your Surroundings</h1>
<p>...Filler Text</p>
<p>...Filler Text</p>
<p>Filler Text</p>
</section>
</body>
</html>
这是我的CSS：
/*RESET*/
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, font, 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 {margin:0; padding:0; border:0; outline:0; font-size:100%; vertical-align:baseline; background:transparent;} body {line-height: 1;}ol, ul{list-style:none;} blockquote, q{quotes:none;} blockquote:before, blockquote:after, q:before, q:after{content:'';content:none;} :focus{outline:0;} ins{text-decoration:none;} del{text-decoration:line-through;} table{border-collapse:collapse; border-spacing:0;}
/*MAIN*/
body {
font-size: 1.05em;
line-height: 1.25em;
font-family: Helvetica Neue, Helvetica, Arial;
background: #f9f9f9;
color: #555;
}
a {
color: #4C9CF1;
text-decoration: none;
font-weight: bold;
}
a:hover { color: #444; }
img { width: 100%; }
header {
background: #fff;
width: 100%;
height: 76px;
position: fixed;
top: 0;
left: 0;
border-bottom: 4px solid #4C9CF1;
z-index: 100;
}
#logo{
margin: 20px;
float: left;
width: 200px;
height: 40px;
background: url(nav-logo.png) no-repeat center;
display: block;
}
nav { float: right; padding: 20px; }
#menu-icon {
display: hidden;
width: 40px;
height: 40px;
background: #4C8FEC url(nav-menu-icon.png) center;
}
a:hover#menu-icon {background-color: #444; border-radius: 4px 4px 0 0; }
ul { list-style: none; }
li {
display: inline-block;
float: left;
padding: 10px
}
.current {color: #2262AD;}
section {
margin: 80px auto 40px;
max-width: 980px;
position: relative;
padding: 20px
}
h1 {
font-size: 2em;
color: #2262AD;
line-height: 1.15em;
margin: 20px 0 ;
}
p {line-height: 1.45em; margin-bottom: 20px;}
/*MEDIA QUERY*/
@media only screen and (max-width : 640px) {
header {position: absolute; }
#menu-icon { display:inline-block; }
nav ul, nav:active ul {
display: none;
position: absolute;
padding: 20px;
background: #fff;
right: 20px;
top: 60px;
width: 50%;
}
nav li {
text-align: left;
width: 100%;
padding: 10px 0;
margin: 0;
}
如果这只是一种愚蠢的方式来做我想做的事情，我愿意接受更简单的替代方案。