                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /网页定位导航特效

代码照着老师讲的看了几遍也没找到什么问题，为什么没有出现滚动定楼层呢？求解大白一个，勿喷！

<!DOCTYPE html>

<html>

<head>

<title>地狗购物网——网页定位导航效果</title>

<style>

* {

margin: 0;

padding: 0;

}

body {

font-size: 12px;

line-height: 1.7;

}

li {

list-style: none;

}

#content {

width: 800px;

margin: 0 auto;

padding: 20px;

}

#content h1 {

color: #0088bb;

}

#content .item {

padding: 20px;

margin-bottom: 20px;

border: 1px dotted #0088bb;

}

#content .item h2 {

font-size: 16px;

font-weight: bold;

border-bottom: 2px solid #0088bb;

margin-bottom: 10px;

}

#content .item li {

display: inline;

margin-right: 10px;

}

#content .item li a img {

width: 230px;

height: 230px;

border: none;

}

/*请补充此处代码，让导航菜单在右侧绝对定位显示*/

#menu{position:fixed;

left:50%;

top:100px;

margin-left:400px;}

#menu ul li a {

display: block;

margin: 5px 0;

font-size: 14px;

font-weight: bold;

color: #333;

width: 80px;

height: 50px;

line-height: 50px;

text-decoration: none;

text-align: center;

}

#menu ul li a:hover,

#menu ul li a.current {

color: #fff;

background: #0088bb;

}

/*ie6 hack*/

* html, * html body {

background-image: url(about:blank);

background-attachment: fixed;

}

* html #menu {

/*position: fixed;*/

position: absolute;

top: expression(((e=document.documentElement.scrollTop)?e:document.body.scrollTop)+100+'px');

}

</style>

//滚动条发生滚动时，要获取相应的值。

$(document).ready(function(){

// 滚动条发生滚动

$(window).scroll(function(){

//在这里，我们做一些事情

var top=$(document).scrollTop();

var menu=$("#menu");

var items=$("#current").find(".item");

var currentId="";//当前所在的楼层（item）id

items.each(function(){

var m=$(this);

var itemTop=m.offset().top;

if(top>itemTop-200){

currentId="#"+m.attr("id");

} else{

return false;

}

});

//给相应的楼层的a设置current，取消其他链接的current

var currentLink=menu.find(".current");

if(currentId && currentLink.attr("href")!=currentId){

currentLink.removeClass("current");

menu.find("[href="+ currentId + "]").addClass("current")

}

// console.log(top)

});

</script>

</head>

<body>

<ul>

</ul>

</div>

<h1>地狗购物网</h1>

<ul>

</ul>

</div>

<ul>

</ul>

</div>

<ul>

</ul>

</div>

<ul>

</ul>

</div>

<ul>

</ul>

</div>

</body>

</html>

慕粉3597558

2016-10-22

源自：网页定位导航特效 4-5

关注问题我要回答

1172

操作

收起

5 回答

云彩无色3804005
2016-10-28

var items=$("#current").find(".item"); #current改成#content
2.锚点链接没加
<li><a href="#" class="current">1F 男装</a></li>。。。。
全部改成相应的href="#item1" href="#item2" href="#item3" href="#item4" href="#item5"
3. </script> 多个去掉个
上面代码测试过，问题解决，你试下，我也是今晚问题才解决

0 回复有任何疑惑可以回复我~

收起回答

云彩无色3804005
2016-10-28

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8"/>

<title>地狗购物网——网页定位导航效果</title>

<style>

        * {

            margin: 0;

            padding: 0;

        }

        body {

            font-size: 12px;

            line-height: 1.7;

        }

        li {

            list-style: none;

        }

        #content {

            width: 800px;

            margin: 0 auto;

            padding: 20px;

        }

        #content h1 {

            color: #0088bb;

        }

        #content .item {

            padding: 20px;

            margin-bottom: 20px;

            border: 1px dotted #0088bb;

        }

        #content .item h2 {

            font-size: 16px;

            font-weight: bold;

            border-bottom: 2px solid #0088bb;

            margin-bottom: 10px;

        }

        #content .item li {

            display: inline;

            margin-right: 10px;

        }

        #content .item li a img {

            width: 230px;

            height: 230px;

            border: none;

        }



/*请补充此处代码，让导航菜单在右侧绝对定位显示*/

#menu{position:fixed;

left:50%;

top:100px;

margin-left:400px;}



        #menu ul li a {

            display: block;

            margin: 5px 0;

            font-size: 14px;

            font-weight: bold;

            color: #333;

            width: 80px;

            height: 50px;

            line-height: 50px;

            text-decoration: none;

            text-align: center;

        }

        #menu ul li a:hover,

        #menu ul li a.current {

            color: #fff;

            background: #0088bb;

        }

        /*ie6 hack*/

        * html, * html body {

            background-image: url(about:blank);

            background-attachment: fixed;

        }

        * html #menu {

            /*position: fixed;*/

            position: absolute;

            top: expression(((e=document.documentElement.scrollTop)?e:document.body.scrollTop)+100+'px');

        }

</style>

<script src="http://libs.baidu.com/jquery/1.10.2/jquery.js"></script>

<script>



            //滚动条发生滚动时，要获取相应的值。



          $(document).ready(function(){

       // 滚动条发生滚动

         $(window).scroll(function(){

             //在这里，我们做一些事情

            var top=$(document).scrollTop();

             var menu=$("#menu");

             var items=$("#content").find(".item");

             var currentId="";//当前所在的楼层（item）id

             items.each(function(){

                var m=$(this);

                 var itemTop=m.offset().top;

                 if(top>itemTop-200){

                  currentId="#"+m.attr("id");

                 } else{

                      return false;

                 }

             });

             //给相应的楼层的a设置current，取消其他链接的current

             var currentLink=menu.find(".current");

             if(currentId && currentLink.attr("href")!=currentId){

                 currentLink.removeClass("current");

                 menu.find("[href="+ currentId + "]").addClass("current")

             }

            // console.log(top)

         });

     });

    </script>

</head>

<body>

<div id="menu">

<ul>



<li><a href="#item1" class="current">1F 男装</a></li>

<li><a href="#item2">2F 女装</a></li>

<li><a href="#item3">3F 美妆</a></li>

<li><a href="#item4">4F 数码</a></li>

<li><a href="#item5">5F 母婴</a></li>

</ul>

</div>

<div id="content">

<h1>地狗购物网</h1>

<div id="item1" class="item">

<h2>1F 男装</h2>

<ul>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//53660fce0001111903990422.jpg" alt=""/></a></li>

</ul>

</div>

<div id="item2" class="item">

<h2>2F 女装</h2>

<ul>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//5366104c0001e5c403990422.jpg" alt=""/></a></li>

</ul>

</div>

<div id="item3" class="item">

<h2>3F 美妆</h2>

<ul>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610820001cf5b03990422.jpg" alt=""/></a></li>

</ul>

</div>

<div id="item4" class="item">

<h2>4F 数码</h2>

<ul>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610ac00012df703990422.jpg" alt=""/></a></li>

</ul>

</div>

<div id="item5" class="item">

<h2>5F 母婴</h2>

<ul>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

<li><a href="#"><img src="http://img1.sycdn.imooc.com//536610cd0001f34603990422.jpg" alt=""/></a></li>

</ul>

</div>

</div>

</body>

</html>