具有下拉菜单样式的CSS菜单

Question

我正在为刚开始创业的朋友制作这个简单的工作清单/客户/库存管理平台。

它是用html，php和css构建的。

我面临的问题是页面C​​SS。 子菜单的宽度正在缩小，无法更改。 菜单基于w3schools示例，此处进行了更改，在那里我找到了谷歌搜索/ SO搜索。 但是找不到原因以及如何解决我的问题。

 body { margin: 0; } ul { list-style-type: none; position: fixed; top: 0; width: 100%; margin: 0; padding: 0; background-color: #003366; } li { display: inline-block; position: relative; float: left; } li a, .dropbtn { display: inline-block; color: white; text-align: center; padding: 14px 16px; text-decoration: none; } li a:hover, .dropdown:hover .dropbtn { background-color: #0066CC; } li.dropdown { display: inline-block; border-right: 1px solid #bbb; } li.right { float: right; } .arrow { font-size: 8px; line-height: 0%; } .dropdown-content { display: none; position: absolute; top: 100%; background-color: #f9f9f9; min-width: 160px; box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2); z-index: 1; } .dropdown-content a { color: black; padding: 12px 16px; text-decoration: none; display: block; text-align: left; } .dropdown-content a:hover { background-color: #f1f1f1 } .dropdown:hover .dropdown-content { display: block; } 

 <!-- Header --> <header id="header"> <nav id="nav"> <ul> <li class="dropdown"> <a href="#" class="dropbtn">Reparações <span class="arrow">&#9660;</span></a> <div class="dropdown-content"> <a href="#">Adicionar Pedidos de Reparação</a> </div> </li> <li class="dropdown"> <a href="#" class="dropbtn">Clientes <span class="arrow">&#9660;</span></a> <div class="dropdown-content"> <a href="#">Adicionar Cliente</a> </div> </li> <li class="dropdown"> <a href="#" class="dropbtn">Stocks <span class="arrow">&#9660;</span></a> <div class="dropdown-content"> <a href="#">Adicionar Stock</a> </div> </li> <li class="right"><a href="#">Deltronic</a></li> </ul> </nav> </header> <!-- Header --> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> 

我也设置了一个jsfiddle示例。

希望有人能帮助我理解为什么会这样，并最终实现所寻求的结果。

Answer 1

如果我理解正确，则不希望下拉菜单的内容分为两行。

为此，只需添加white-space: nowrap; 到dropdown-content a的规则：

 body { margin: 0; } ul { list-style-type: none; position: fixed; top: 0; width: 100%; margin: 0; padding: 0; background-color: #003366; } li { display: inline-block; position: relative; float: left; } li a, .dropbtn { display: inline-block; color: white; text-align: center; padding: 14px 16px; text-decoration: none; } li a:hover, .dropdown:hover .dropbtn { background-color: #0066CC; } li.dropdown { display: inline-block; border-right: 1px solid #bbb; } li.right { float: right; } .arrow { font-size: 8px; line-height: 0%; } .dropdown-content { display: none; position: absolute; top: 100%; background-color: #f9f9f9; min-width: 160px; box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2); z-index: 1; } .dropdown-content a { color: black; padding: 12px 16px; text-decoration: none; display: block; text-align: left; white-space: nowrap; } .dropdown-content a:hover { background-color: #f1f1f1 } .dropdown:hover .dropdown-content { display: block; } 

 <!-- Header --> <header id="header"> <nav id="nav"> <ul> <li class="dropdown"> <a href="#" class="dropbtn">Reparações <span class="arrow">&#9660;</span></a> <div class="dropdown-content"> <a href="#">Adicionar Pedidos de Reparação</a> </div> </li> <li class="dropdown"> <a href="#" class="dropbtn">Clientes <span class="arrow">&#9660;</span></a> <div class="dropdown-content"> <a href="#">Adicionar Cliente</a> </div> </li> <li class="dropdown"> <a href="#" class="dropbtn">Stocks <span class="arrow">&#9660;</span></a> <div class="dropdown-content"> <a href="#">Adicionar Stock</a> </div> </li> <li class="right"><a href="#">Deltronic</a></li> </ul> </nav> </header> <!-- Header --> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> <p> weeeeeeeeeee </p> 

Answer 2

您可以将w3schools的CSS文件与您的CSS文件进行比较。 然后，您会注意到您添加了position: relative; 对你的li元素。 这正是您遇到问题的原因。

li {
    display: inline-block;
    position: relative; // This is what's causing the problem
    float: left;
}

除非有任何特定原因要进行更改，否则就摆脱它，您就可以进行了。