如果窗口不是全屏，则水平css菜单<li>项目在自身下重新定位</li>

Question

我的CSS存在问题。菜单工作正常但是当您将窗口从全屏调整到任何其他大小时，菜单会在右端切断，然后再从菜单下方的左侧开始。我有一个类似的问题与不同的页面，我能够用位置修复它：绝对但这似乎没有解决这个问题。我不是初学者，但我不是专业人士。如果有人可以帮我弄清楚如何让窗口从左向右滚动而不是向下移动菜单选项，那就太棒了。

我的css菜单中包含div标记：

<div id='cssmenu' align='justify' style="z-index: 1;">

然后我有多个菜单遍布页面顶部

<ul><br>
    <li class='has-sub'>  ~a href='index.html'>Home ~/a> ~/li>  
    <li class='has-sub'>  ~a href='index.html'>General Info~/a> ~/li>  
    <li class='has-sub'>  ~a href='index.html'>Downloads~/a> ~/li>  
    <li class='has-sub'>  ~a href='index.html'> ~/a> ~/li>  
    <li class='has-sub'>  ~a href='index.html'>Home ~/a> ~/li>  
    <li class='has-sub'>  ~a href='index.html'>Home ~/a> ~/li>  
<ul>

</code>

这是我的CSS。

#cssmenu ul,
#cssmenu li,
#cssmenu span,
#cssmenu a {
    margin: auto;
    padding: 0;
    position: relative; 
    top: o;
    z-index: 1;
}

#cssmenu {
    height: 49px;
    border-radius: 5px 5px 0 0;
    -moz-border-radius: 5px 5px 0 0;
    -webkit-border-radius: 5px 5px 0 0;
    background: #fefefe;
    background: -moz-linear-gradient(top, #fefefe 0%, #eee9f0 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #fefefe),            color-stop(100%, #eee9f0));
    background: -webkit-linear-gradient(top, #fefefe 0%, #eee9f0 100%);
    background: -o-linear-gradient(top, #fefefe 0%, #eee9f0 100%);
    background: -ms-linear-gradient(top, #fefefe 0%, #eee9f0 100%);
    background: linear-gradient(top, #fefefe 0%, #eee9f0 100%);
    border-bottom: 2px solid #a30813;
    width: auto;
    z-index: 1;
}

#cssmenu:after,
#cssmenu ul:after {
    content: '';
    display: block;
    clear: both;
    z-index: 1;
}

#cssmenu a {
    background: #fefefe;
    background: -moz-linear-gradient(top, #fefefe 0%, #ececec 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #fefefe), color-stop(100%, #ececec));
    background: -webkit-linear-gradient(top, #fefefe 0%, #ececec 100%);
    background: -o-linear-gradient(top, #fefefe 0%, #ececec 100%);
    background: -ms-linear-gradient(top, #fefefe 0%, #ececec 100%);
    background: linear-gradient(top, #fefefe 0%, #ececec 100%);
    color: #000;
    display: inline-block;
    font-family: Helvetica, Arial, Verdana, sans-serif;
    font-size: 12px;
    line-height: 49px;
    padding: 0 20px;
    text-decoration: none;
    z-index: 1;
}

#cssmenu ul {
    list-style: none;
    z-index: 1;
}

#cssmenu > ul {
    float: left;
    z-index: 1;
} 

#cssmenu > ul > li {
    float: left;
    padding-left: 45px; /* This value moves the menu to the left*/
    z-index: 1;
    position: relative;
}

#cssmenu > ul > li > a {
color: #000;
    font-size: 12px;
    z-index: 1;
    position: relative;
    display:block;
}


#cssmenu > ul > li:hover:after {
    content: '';
    display: relative;
    width: 0;
    height: 0;
    position: absolute;
    left: 50%;
    bottom: 0;
    z-index: 0 !important;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid #a30813;
    margin-left: -10px;
    float:left;
    margin-top:0px !important;
    z-index: 1;
}

#cssmenu > ul > li:first-child > a {
    border-radius: 5px 0 0 0;
    -moz-border-radius: 5px 0 0 0;
    -webkit-border-radius: 5px 0 0 0;
    float:left;
    margin-top:0px !important;
    z-index: 1;
}

#cssmenu > ul > li.active:after {
    content: '';
    display: block;
    width: 0;
    height: 0;
    position: absolute;
    left: 50%;
    bottom: 0;
    z-index: 1;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid #a30813;
    margin-left: -10px;
    float:left;
    margin-top:0px !important;
    z-index: 1;
} 

#cssmenu > ul > li.active > a {
    -moz-box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.1);
    -webkit-box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.1);
    box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.1);
    background: #ececec;
    background: -moz-linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #ececec),    color-stop(100%, #ffeeff ef));
    background: -webkit-linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    background: -o-linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    background: -ms-linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    background: linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    z-index: 1;
    margin-top:0px !important;
    z-index: 1;
}

#cssmenu > ul > li:hover > a {
    background: #ececec;
    background: -moz-linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #ececec), color-stop(100%, #ffeeff ef));
    background: -webkit-linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    background: -o-linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    background: -ms-linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    background: linear-gradient(top, #ececec 0%, #ffeeff ef 100%);
    -moz-box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.1);
    -webkit-box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.1);
    box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.1);
    z-index: 1;
    margin-top:0px !important;
    z-index: 1 !important;
}

#cssmenu .has-sub {
    z-index: 1;
    padding-left: 50px;
    z-index: 1;
}

#cssmenu .has-sub:hover > ul {
    display: block;
    z-index: 1;
    padding-left: 50px;/* this value is used to align the menu*/
    z-index: 1;
}

#cssmenu .has-sub ul {
    display: none;
    position: absolute;
    width: 200px;
    top: 100%;
    left: 0;
    z-index: 1;
}

 #cssmenu .has-sub ul li {
     *margin-bottom: -1px;
     z-index: 1;
     padding-left: 0px; 
     z-index: 1;
 }

#cssmenu .has-sub ul li a {
    background: #a30813;
    border-bottom: 1px dotted #d40a19;
    filter: none;
    font-size: 11px;
    display: block;
    line-height: 120%;
    padding: 10px;
    color: #ffffff;
    top:0;
    z-index: 1;
}

#cssmenu .has-sub ul li:hover a {
    background: #72060d;
    margin-top:0px !important;
    z-index: 1 !important;
    padding-left:55px;  /*this value moves the text to the left when highlighted*/
}

#cssmenu .has-sub .has-sub:hover > ul {
    display: block;
    margin-top:0px !important;
    z-index: 1 !important;
    padding-left:0; /* this keeps the sub-menu close to the drop down menu*/
} 

#cssmenu .has-sub .has-sub ul {
    display: none;
    position: absolute;
    left: 100%;
    top:0;
    z-index: 1;
}

#cssmenu .has-sub .has-sub ul li a {
    background: #72060d;
    border-bottom: 1px dotted #d40a19;
    padding-left:5px; /* this aligns the txt to the left for the sub-menu */
    z-index: 1;
} 

#cssmenu .has-sub .has-sub ul li a:hover {
    background: #5a040b;
    margin-top:0px !important;
    z-index: 1 !important;
    padding-left:50px; /* this moves the text on the sub-menu when hovered over*/
}

Answer 1

基本上，<li>元素从左到右浮动。当组合列表元素的宽度超过<ul>的宽度时，它会中断并在新行上开始。

你可以做的是给<div>一个宽度：100％和溢出：隐藏，这样你就看不到任何东西掉落并开始新的行。

然后你可以给<ul>一个宽度：1000px，这样<li>就可以穿过屏幕并被切断，但仍然有点可见。 Here is what it would look like.

之后的问题是你需要通过字体或填充来调整<li>项的大小;如果使用多个布局，最好使用媒体查询调整大小。如果您希望它们动态调整大小，您可以编写一个javascript函数来处理大小/间距。