我正在设计一个用于学习目的的网站,出于某种原因,我的导航栏对于所有选项卡都处于“悬停”状态。我正在关注的教程非常深入,但我已经研究了代码几个小时,我想我只是没有足够的知识来找出问题所在。在排除故障时,我查看了源代码并复制了它(来自他们的示例),但仍然遇到同样的问题。按钮都“总是”处于悬停状态,因此 Java Script 似乎没有做任何事情。
教程:http ://www.shopdev.co.uk/blog/animated-menus-using-jquery/
我为此创建了 3 张图片(与教程略有不同)
bkrd.png = 400 像素高的窄图像,重复背景工具栏(无菜单选项卡)
spritedown.png = 显示正常按钮状态(主页和投资组合)的精灵 81 像素高
spriteover.png = 显示按钮悬停状态的精灵。81 像素高
我的代码:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery Animated Menu Demo</title>
<style>
body {
background-color:#333333;
margin:0;
}
/* Menu Body */
ul#menu {
width:80%;
height:400px;
background:url(bkrd.png) repeat-x;
list-style:none;
margin:0;
padding:0;
padding-top:109px; /* distance from top where i need the sprite to start*/
padding-left:20%;
}
/* Float LI Elements - horizontal display */
ul#menu li {
float:left;
}
/* Link - common attributes */
ul#menu li a {
background:url(spritedown.png) no-repeat scroll top left;
display:block;
height:81px;
position:relative;
}
/* Specify width and background position attributes specifically for the class: "home" */
ul#menu li a.home {
width:159px;
background-position:0px 0px;
}
/* Specify width and background position attributes specifically for the class: "portfolio" */
ul#menu li a.portfolio {
width:157px;
background-position:-159px 0px;
}
/* Span (on hover) - common attributes */
ul#menu li a span {
background:url(spriteover.png) no-repeat scroll bottom left;
display:block;
position:absolute;
top:0;
left:0;
height:81px;
width:100%;
z-index:100;
}
/* Span (on hover) - display pointer */
ul#menu li a span:hover {
cursor:pointer;
}
/* Shift background position on hover for the class: "home" */
ul#menu li a.home span {
width:159px;
background-position:0px 0px;
}
/* Shift background position on hover for the class: "portfolio" */
ul#menu li a.portfolio span {
background-position:-159px 0px;
}
</style>
剧本:
<!-- Include jQuery Library -->
<script src="jquery-1.2.2.pack.js" type="text/javascript"></script>
<!-- Let's do the animation -->
<script type="text/javascript">
$(function() {
// set opacity to nill on page load
$("ul#menu span").css("opacity","0");
// on mouse over
$("ul#menu span").hover(function () {
// animate opacity to full
$(this).stop().animate({
opacity: 1
}, 'slow');
},
// on mouse out
function () {
// animate opacity to nill
$(this).stop().animate({
opacity: 0
}, 'slow');
});
});
</script>
</head>
身体:
<body>
<ul id="menu">
<li><a href="#" class="home"><span></span></a></li>
<li><a href="#" class="portfolio"><span></span></a></li>
</ul>
</body>
</html>