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我正在使用基于 css3 的下拉菜单。它基于 css 中提到的悬停工作。但我需要在 ipad 上完成这项工作，因为 ipad 不考虑悬停下拉菜单在 ipad 上不起作用。

ipad有什么值得一提的吗？如果我们只能更改我现有的 CSS，那就太好了。

     <!DOCTYPE html>
    <html>
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
            <title>menu</title>
<style>
/* Main menu */
.menu
{
    width: 100%;
    margin: 0;
    padding: 10px 0 0 0;
    list-style: none;  
    background: #111;
    background: -moz-linear-gradient(#444, #111); 
    background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #111),color-stop(1, #444));  
    background: -webkit-linear-gradient(#444, #111);    
    background: -o-linear-gradient(#444, #111);
    background: -ms-linear-gradient(#444, #111);
    background: linear-gradient(#444, #111);
    -moz-border-radius: 50px;
    border-radius: 50px;
    -moz-box-shadow: 0 2px 1px #9c9c9c;
    -webkit-box-shadow: 0 2px 1px #9c9c9c;
    box-shadow: 0 2px 1px #9c9c9c;
}
.menu li
{
    float: left;
    padding: 0 0 10px 0;
    position: relative;
    line-height: 0;
}
.menu a 
{
    float: left;
    height: 25px;
    padding: 0 25px;
    color: #999;
    text-transform: uppercase;
    font: bold 12px/25px Arial, Helvetica;
    text-decoration: none;
    text-shadow: 0 1px 0 #000;
}
.menu li:hover > a
{
    color: #fafafa;
}
.menu li:hover > ul
{
    display: block;
}

/* Sub-menu */
.menu ul
{
    list-style: none;
    margin: 0;
    padding: 0;    
    display: none;
    position: absolute;
    top: 35px;
    left: 0;
    z-index: 99999;    
    background: #444;
    background: -moz-linear-gradient(#444, #111);
    background: -webkit-gradient(linear,left bottom,left top,color-stop(0, #111),color-stop(1, #444));
    background: -webkit-linear-gradient(#444, #111);    
    background: -o-linear-gradient(#444, #111); 
    background: -ms-linear-gradient(#444, #111);    
    background: linear-gradient(#444, #111);
    -moz-box-shadow: 0 0 2px rgba(255,255,255,.5);
    -webkit-box-shadow: 0 0 2px rgba(255,255,255,.5);
    box-shadow: 0 0 2px rgba(255,255,255,.5);   
    -moz-border-radius: 5px;
    border-radius: 5px;
}
.menu ul ul
{
  top: 0;
  left: 150px;
}

.menu ul li
{
    float: none;
    margin: 0;
    padding: 0;
    display: block;  
}
.menu ul li:last-child
{   
    -moz-box-shadow: none;
    -webkit-box-shadow: none;
    box-shadow: none;    
}
.menu ul a
{    
    padding: 10px;
    height: 10px;
    width: auto;
    height: auto;
    line-height: 1;
    display: block;
    white-space: nowrap;
    float: none;
    text-transform: none;
}
.menu ul a:hover
{
    background: #0186ba;
    background: -moz-linear-gradient(#04acec,  #0186ba);    
    background: -webkit-gradient(linear, left top, left bottom, from(#04acec), to(#0186ba));
    background: -webkit-linear-gradient(#04acec,  #0186ba);
    background: -o-linear-gradient(#04acec,  #0186ba);
    background: -ms-linear-gradient(#04acec,  #0186ba);
    background: linear-gradient(#04acec,  #0186ba);
}

.menu ul li:first-child > a
{
    -moz-border-radius: 5px 5px 0 0;
    border-radius: 5px 5px 0 0;
}

.menu ul li:first-child a:hover
{
    border-bottom-color: #04acec; 
}

.menu ul ul li:first-child a:hover
{
    border-right-color: #04acec; 
    border-bottom-color: transparent;   
}


.menu ul li:last-child > a
{
    -moz-border-radius: 0 0 5px 5px;
    border-radius: 0 0 5px 5px;
}

/* Clear floated elements */
.menu:after 
{
    visibility: hidden;
    display: block;
    font-size: 0;
    content: " ";
    clear: both;
    height: 0;
}

</style>
        </head>
        <body>
        <ul class="menu">
                <li><a href="#">Home</a></li>
                <li>
                    <a href="#">Categories</a>
                        <ul>
                        <li><a href="#">CSS</a></li>
                        <li><a href="#">menu2</a></li>
                        <li><a href="#">menu 3</a></li>
                        <li><a href="#">menu 4menu2menu2menu2menu2</a></li>
                        </ul>
                </li>
                <li><a href="#">Work</a></li>
                <li><a href="#">About</a></li>
                <li><a href="#">Contact</a></li>
        </ul>

    </body>
    </html>
4

1 回答 1

2

当触发 touchstart 和 touchend 事件时，尝试将类应用于 li。并在你的 CSS 中使用该 (.hover) 以及 :hover 伪事件

例如在你的js中：

if((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i)) || (navigator.userAgent.match(/iPad/i))) {
    $(".menu li a").bind('touchstart', function(){
        $(this).addClass('hover');
    });

    $(".menu li a").bind('touchend', function(){
        $(this).removeClass('hover');
    });
}
于 2012-05-17T13:22:46.603 回答