使用jQuery开发iOS风格的页面导航菜单
iOS风格的操作系统和导航方式现在越来越流行,在今天的jQuery教程中,我们将介绍如何生成一个iphone风格的菜单导航。
HTML代码
我们使用镶嵌的<li>来生成菜单内容,并且包含在<nav>标签中,如下:
- <nav>
- <h1>导航菜单</h1>
- <ul>
- <li>
- <h2>专题教程</h2>
- <ul>
- <li>
- <h3>HTML专题教程</h3>
- <ul>
- <li><a href="http://www.gbin1.com/tutorials/html5-tutorial/html5-introduction">GBin1专题之HTML5教程 - 第一篇:HTML5介绍</a></li>
- <li><a href="http://www.gbin1.com/tutorials/html5-tutorial/html5-new-elements">GBin1专题之HTML5教程 - 第二篇:HTML5元素</a></li>
- <li><a href="http://www.gbin1.com/tutorials/html5-tutorial/html5-video">GBin1专题之HTML5教程 - 第三篇:HTML5 Video元素</a></li>
- <li><a href="http://www.gbin1.com/tutorials/html5-tutorial/html5-video-doc">GBin1专题之HTML5教程 - 第四篇:HTML5 Video Doc</a></li>
- <li><a href="http://www.gbin1.com/tutorials/html5-tutorial/html5-audio">GBin1专题之HTML5教程 - 第五篇:HTML5 Audio元素</a></li>
- </ul>
- <li>
- <h3>GBin1热点秀</h3>
- <ul>
- <li><a href="http://www.gbin1.com/tutorials/hotspot/hotspot1/">GBin1专题之Web热点秀#1</a>
- <li><a href="http://www.gbin1.com/tutorials/hotspot/hotspot2/">GBin1专题之Web热点秀#2</a>
- <li><a href="http://www.gbin1.com/tutorials/hotspot/hotspot3/">GBin1专题之Web热点秀#3</a>
- </ul>
- </ul>
- 。。。 。。。
Javascript
使用jQuery来查询遍历li,并且生成菜单项目,如下:
- $(function(){
- var nav = $("nav"),
- navTitle = nav.children().first(),
- navTitleLabel = navTitle.text(),
- mainList = navTitle.next(),
- subLevels = mainList.find("ul"),
- hiddenClass = "hidden";
- nav.addClass("js");
- mainList.find("a:last-child").addClass("files");
- subLevels.addClass(hiddenClass);
- navTitle.wrap($("<div/>")).before($("<a/>", {
- href: "#",
- className: hiddenClass,
- click: function(e){
- var $this = $(this),
- activeList = subLevels.filter(":visible:last"),
- activeListParents = activeList.parents("ul");
- navTitle.text($this.text());
- if(activeListParents.length > 2)
- $this.text(activeListParents.eq(1).prev().text());
- else if (activeListParents.length > 1)
- $this.text(navTitleLabel)
- else
- $this.addClass(hiddenClass).empty();
- setTimeout(
- function(){
- activeList.addClass(hiddenClass);
- }, slideDuration - 100
- );
- mainList.css("left", parseInt(mainList.css("left")) + navWidth + "px");
- e.preventDefault();
- }
- }));
- subLevels.prev().wrap($("<a/>", {
- href:"#",
- click: function(e){
- var $this = $(this);
- backArrow.removeClass(hiddenClass).text(navTitle.text());
- navTitle.text($this.text());
- $this.next().removeClass(hiddenClass);
- mainList.css("left", parseInt(mainList.css("left")) - navWidth + "px");
- e.preventDefault();
- }
- }));
- var backArrow = navTitle.prev(),
- navWidth = nav.width(),
- firstSubLevel = subLevels.eq(0),
- docStyle = document.documentElement.style,
- slideDuration = 0,
- timingRatio = 1000;
- if(docStyle.WebkitTransition !== undefined)
- slideDuration = parseFloat(
- firstSubLevel.css("-webkit-transition-duration")
- ) * timingRatio;
- if(docStyle.MozTransition !== undefined)
- slideDuration = parseFloat(
- firstSubLevel.css("-moz-transition-duration")
- ) * timingRatio;
- if(docStyle.OTransition !== undefined)
- slideDuration = parseFloat(
- firstSubLevel.css("-o-transition-duration")
- ) * timingRatio;
- });
CSS
使用图片来生成页面顶端的按钮:
- body {
- font-size: 14px;
- font-family: Arial;
- background:#f5f5f8;
- }
- .js {
- position:absolute;
- width:320px;
- height:480px;
- top:50%;
- left:50%;
- margin:-280px 0 0 -160px;
- overflow:hidden;
- -webkit-border-radius:5px;
- -moz-border-radius:5px;
- border-radius:5px;
- background:#fff;
- -webkit-box-shadow:0 1px 2px rgba(0,0,0,.25);
- -moz-box-shadow:0 1px 2px rgba(0,0,0,.25);
- box-shadow:0 1px 2px rgba(0,0,0,.25);
- }
- .js .files {
- background-image:none;
- }
- .js .hidden {
- display:none;
- }
- .js * {
- font-size:14px;
- font-weight:400;
- margin:0;
- padding:0;
- list-style:none;
- }
- .js > div {
- position:relative;
- z-index:1;
- height:44px;
- text-align:center;
- font-size:14px;
- line-height:44px;
- color:#fff;
- text-shadow:0 -1px 0 rgba(0,0,0,.4);
- background:#7f94b0;
- background:-webkit-gradient(
- linear,
- 0 0,
- 0 100%,
- color-stop(0,#b5c0ce),
- color-stop(0.5,#889bb3),
- color-stop(0.51,#7f94b0),
- color-stop(1,#6d83a1)
- );
- background:-moz-linear-gradient(
- top center,
- #b5c0ce,
- #889bb3 22px,
- #7f94b0 23px,
- #6d83a1
- );
- border-bottom:1px solid #2d3033;
- -webkit-border-top-left-radius:5px;
- -webkit-border-top-right-radius:5px;
- -moz-border-radius-topleft:5px;
- -moz-border-radius-topright:5px;
- border-top-left-radius:5px;
- border-top-right-radius:5px;
- }
- .js > div a {
- height:31px;
- top:7px;
- left:20px;
- font-size:14px;
- line-height:31px;
- color:#fff;
- background:url('../images//center.png');
- }
- .js > div a, .js > div a:before, .js > div a:after {
- position:absolute;
- }
- .js > div a:before {
- left:-13px;
- content:url('../images//left.png');
- }
- .js > div a:after {
- right:-10px;
- top:0;
- content:url('../images//right.png');
- }
- .js > div a:active {
- opacity:.65;
- }
- .js a {
- text-decoration:none;
- }
- .js ul a {
- display:block;
- color:#000;
- padding:.8em 18px;
- border-bottom:1px solid #e0e0e0;
- background:url('images/next.png') no-repeat 94% 50%;
- }
- .js ul a:hover {
- background-color:#edf3fe;
- }
- .js a:focus {
- outline:none;
- }
- .js ul {
- position:absolute;
- top:0;
- padding-top:45px;
- width:100%;
- -webkit-transition:left .4s ease-out;
- -moz-transition:left .4s ease-out;
- -o-transition:left .4s ease-out;
- }
- .js ul {
- left:0;
- }
- .js ul ul {
- left:320px;
- }
搞定! 请参考在线演示查看效果,希望大家喜欢这个简单的效果!