css3和jquery实现的可折叠导航菜单(适合手机网页)

之前为大家介绍了好几款css3导航，今天为大家在介绍的是一款适合放在手机网页的导航菜单。点击列表图标以下拉式的形式显示菜单，单击关闭，动画关闭。效果相当不错。效果图如下：

在线预览源码下载

这个实例由css3和依赖于jquery插件。下面是实现代码

html代码：

   <nav class="nav" role="navigation" style="height: 195px;">        <ul class="nav-items">            <li><a target=_blank href="http://www.w2bc.com">Home</a></li>            <li><a target=_blank href="http://www.w2bc.com">About</a></li>            <li><a target=_blank href="http://www.w2bc.com">Clients</a></li>            <li><a target=_blank href="http://www.w2bc.com">Contact Us</a></li>        </ul>    </nav>    <header style="-webkit-transform: translate3d(0px, 195px, 0px);">  <button class="menu-button-target active" data-ic-class="button-trigger">      <span class="menu-button"></span>  </button>  Example Header</header>    <section>        <article>        </article>        <article>        </article>        <article>        </article>        <article>        </article>        <article>        </article>    </section>

css3代码：

  *        {            box-sizing: border-box;        }        body        {            font-family: "HelveticaNeue-Light" , "Helvetica Neue Light" , "Helvetica Neue" , Helvetica, Arial, "Lucida Grande" , sans-serif;            font-weight: 300;        }        nav        {            position: fixed;            -webkit-transform: translate3d(0, 0, 0);            left: 0;            transition: all 0.4s ease;            width: 100%;            background: #34495e;             height: 0;            overflow: hidden;            transition-delay: 0.25s;                     }        .active nav        {            transition-delay: 0s;        }        nav ul        {            width: 95%;            margin: 0 auto;        }        nav ul li        {            padding: 5px;            border-bottom: 1px solid white;         }        nav ul li:nth-child(1) a        {            transition-delay: 0.1s;        }        nav ul li:nth-child(2) a        {            transition-delay: 0.15s;        }        nav ul li:nth-child(3) a        {            transition-delay: 0.2s;        }        nav ul li:nth-child(4) a        {            transition-delay: 0.25s;        }        nav ul li:last-child        {            border: none;        }        nav ul li a        {            transition: all 0.2s cubic-bezier(0.455, 0.03, 0.515, 0.955);            position: relative;            display: block;            text-decoration: none;            color: white;            font-size: 18px;            padding: 10px;            -webkit-transform: translate3d(100px, 0, 0);            opacity: 0;        }        .active nav ul li a        {            -webkit-transform: translateX(0);            opacity: 1;        }        header        {            transition: all 0.4s ease;            -webkit-transform: translate3d(0, 0, 0);            left: 0;            width: 100%;            position: fixed;            background: #27ae60;            color: white;            padding: 20px;            text-align: center;            font-size: 20px;            transition-delay: 0.25s;        }        .active header        {            transition-delay: .08s;        }        section        {            background: #f5f5f5;            padding-top: 80px;        }        article        {            background: white;            height: 500px;            width: 95%;            border-radius: 3px;            margin: 0 auto 20px auto;            border: 1px solid #e4e4e4;        }        .menu-button-target        {            background: transparent;            border: none;            outline: none;            cursor: pointer;            position: absolute;            z-index: 200;            left: 10px;            height: 50px;            top: 50%;            margin-top: -23px;            webkit-tap-highlight-color: rgba(0, 0, 0, 0);        }        .menu-button-target.active .menu-button        {            transition: background .2s ease;            background-color: transparent;        }        .menu-button-target.active .menu-button:before, .menu-button-target.active .menu-button:after        {            transition: top .3s ease, -webkit-transform .3s .2s ease;        }        .menu-button-target.active .menu-button:before        {            top: 0;            -webkit-transform: rotate(45deg);        }        .menu-button-target.active .menu-button:after        {            top: 0;            -webkit-transform: rotate(-45deg);        }        .menu-button        {            position: relative;            top: 50%;            left: 0;            display: block;            width: 40px;            height: 4px;            margin-top: -2px;            background-color: white;            border-radius: 10px;            transition: background .2s .2s;        }        .menu-button:before, .menu-button:after        {            content: "";            display: block;            position: absolute;            width: 100%;            height: 100%;            left: 0;            background-color: white;            transition: top .3s .2s ease, -webkit-transform .3s ease;            border-radius: 10px;            -webkit-transform-origin: 50% 50%;        }        .menu-button:before        {            top: -10px;            -webkit-transform: rotate(0deg);        }        .menu-button:after        {            top: 10px;            -webkit-transform: rotate(0deg);        }

js代码：

var $menuTrigger = $('[data-ic-class="button-trigger"]'),    $menuOverlay = $('[data-ic-class="overlay"]'),    $menuItem = $('.menu-item'),    activeClass = 'active',    $nav = $('nav'),    $navULHeight = $('.nav-items').outerHeight(),    navOpen = false,    $header = $('header');        var isTouch = false;        if ($('html').hasClass('touch')) {            isTouch = true;        }        function menuFunction() {            $menuTrigger.toggleClass(activeClass);            if (!navOpen) {                $nav.height($navULHeight);                navOpen = true;                $('body').addClass('active');                $header.css('transform', 'translate3d(0, ' + $navULHeight + 'px, 0)');            } else {                $nav.height(0);                $header.css('transform', 'translate3d(0, 0, 0)');                navOpen = false;                $('body').removeClass('active');            }        }        if (isTouch) {            $menuTrigger.on('touchstart', function () {                menuFunction();            });        }        if (!isTouch) {            $menuTrigger.on('click', function () {                menuFunction();            });        }

注：本文爱编程原创文章，转载请注明原文地址：http://www.w2bc.com/Article/5377