每当用户选择带有下拉菜单的链接时,我都会尝试下推我的内容。但是,当单击时,下拉菜单会覆盖内容而不是将其向下推。
我尝试过使用position:relatives/position:absolute等来达到某种期望的结果,但没有这样的运气。我见过与此问题相关的其他类似问题,但它仍然没有帮助我。
任何帮助解决这个问题的帮助将不胜感激。
我的 HTML 和 CSS
body {
margin: 0;
padding: 0;
font-family: "Helvetica", "Arial", sans-serif;
font-weight: 500;
font-style: normal;
font-size: 12px;
line-height: 1.5;
}
.navbar-default {
background-color: #ffffff;
}
.navbar {
min-height: 65px;
padding-top: 5px;
margin-bottom: 0px;
border-bottom: solid 2px #eee;
}
.navbar-header {
margin-top: -12px;
}
.navbar-brand {
padding-top: 0px !important;
}
/* for button placement*/
.navbar-toggle {
margin-top: 26px;
}
/*for collapsed navbar*/
.navbar-collapse {
margin-top: 12px;
}
.site-logo {
max-width: 135px;
min-width: 120px;
}
.navbar-default .navbar-nav>li>a {
text-transform: uppercase;
background-color: #ffffff !important;
color: #333333;
}
.navbar-default .navbar-nav>li>a:hover {
color: #3381d0;
}
.navbar-default .navbar-nav>li>a:hover,
.navbar-default .navbar-nav>.active>a,
.navbar-default .navbar-nav>.active>a:focus,
.navbar-default .navbar-nav>.active>a:hover {
background-color: #ffffff;
border-bottom: 2px solid #ff5d1c;
color: #ff5d1c;
bottom: -2px;
}
.nav>li {
position: static !important;
}
/* For navbar dropdown*/
.navbar .dropdown-menu {
min-width: 1349px;
width: 100%;
height: 120px;
margin-top: 51px;
z-index: 1;
left: 0;
text-align: center;
padding-right: 10px;
position: absolute;
list-style-type: none;
border-top: 2px solid #ff5d1c;
border-bottom: 2px solid #333333;
border-right: #ffffff;
border-radius: 0;
box-shadow: 0px 2px 8px rgba(0, 0, 0, 0.1);
border-left: 0;
background-color: #337ab7;
}
.dropdown-menu {
padding-left: 10px;
padding-right: 10px;
position: relative;
list-style-type: none;
}
.navbar .dropdown-menu li {
margin: 0;
padding: 0;
display: inline-block;
}
.dropdown-menu>li>a {
color: #ffffff;
line-height: 75px;
padding: 3px;
}
.dropdown-menu>li>a:hover {
color: #333333 !important;
}
.dropdown-menu>li>a:hover {
color: #ffffff;
background-color: #337ab7;
}
.m-pub {
display: inline-block;
margin: 3px 40px 0;
font-size: 13px;
font-weight: 400;
text-transform: uppercase;
letter-spacing: .14em;
color: white;
-webkit-transition: none;
-moz-transition: none;
-ms-transition: none;
-o-transition: none;
transition: none;
position: relative;
}
.m-pub:after,
.m-pub:focus {
color: #ffffff;
background-color: #337ab7;
}
.dropdown-menu li .m-pub:hover:after {
content: '';
position: absolute;
left: 50%;
margin-left: -10px;
margin-top: 55px;
border-left: 0;
border-bottom: 17px solid transparent;
border-top: 17px solid transparent;
border-left: 14px solid #333333;
transform: rotate(-90deg);
background: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js" crossorigin="anonymous"></script>
<body>
<nav class="navbar navbar-default navbar-static-top">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle Navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">
</a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav" id="nav">
<li class="nav-link active"><a href="#">Link</a></li>
<li class="nav-link"><a href="#">Link</a></li>
<li class="nav-link"><a href="#">Link</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" id="menu-trigger">Drop-Down Menu<i class="fa fa-angle-down flipped"></i></a>
<ul class="dropdown-menu" id="menu">
<li class="nav-link">
<a href="#" class="m-pub"><i class="fa fa-microphone fa-2x"></i>Option</a>
</li>
<li class="nav-link">
<a href="" class="m-pub"><i class="fa fa-newspaper-o fa-2x"></i>Option</a>
</li>
</ul>
</li>
<li class="nav-link"><a href="#">Link</a></li>
<li class="nav-link"><a href="#">Link</a></li>
</ul>
</div>
</div>
</nav>
<div class="container" style="background: red;height:100px; width: 100%;">
</div>
</body>
我提供了一个jsfiddle:JSFiddle http://jsfiddle.net/aldayne/k8eayhxy/
正如您所怀疑的,您的问题在于定位。不幸的是,如果你使用position: absolute
, .dropdown-menu
从文档流中移除,缠绕在其下方的任何内容之上,而不是将其移开。如果你使用position: relative
它迫使它的父级调整弄乱你的菜单的大小。据我所知,纯 CSS 无法解决这个问题。但是,有一些使用 javascript 的解决方案,并且由于 Bootstrap 已经使用了 JQuery,因此我们可以使用它。
为了将内容向下移动dropdown-menu
单击后您需要更改.container
、内容本身或父/祖父元素dropdown-menu
是相对于.我选择添加margin-bottom
祖父母,在本例中是nav
元素。您可以轻松添加margin-top
to .container
。无论哪种方式,您都需要将边距设置为等于高度.dropdown-menu
其设置为120px
。我创建了以下规则来实现此目的:
nav.navbar.open {
margin-bottom: 120px;
}
额外的班级.open
将由 JQuery 添加li.dropdown
被点击。我只是使用 JQuery 的快速功能来完成此任务:
$("li.dropdown").click(function() {
$("nav.navbar" ).toggleClass( "open");
});
这就是所需要的一切。什么时候li.dropdown
被点击了.open
被添加到nav
元素将其底部边距增加到与.dropdown-menu
。边距不影响.dropdown-menu
因为它是绝对定位的,而只是向下推.container
就好像.dropdown-menu
未从文档流中删除。使用理由li.dropdown
并不是#menu-trigger
(链接本身)是因为如果您使用该链接,然后单击.dropdown-menu
菜单被取消,但边距仍然存在。通过使用父级dropdown-menu
每当单击父级的子级时,仍会注册单击事件。如果使用同级,则不会发生触发器。
$("li.dropdown").click(function() {
$("nav.navbar").toggleClass("open");
});
body {
margin: 0;
padding: 0;
font-family: "Helvetica", "Arial", sans-serif;
font-weight: 500;
font-style: normal;
font-size: 12px;
line-height: 1.5;
}
.navbar-default {
background-color: #ffffff;
}
.navbar {
min-height: 65px;
padding-top: 5px;
margin-bottom: 0px;
border-bottom: solid 2px #eee;
}
.navbar-header {
margin-top: -12px;
}
.navbar-brand {
padding-top: 0px !important;
}
/* for button placement*/
.navbar-toggle {
margin-top: 26px;
}
/*for collapsed navbar*/
.navbar-collapse {
margin-top: 12px;
}
.site-logo {
max-width: 135px;
min-width: 120px;
}
.navbar-default .navbar-nav > li > a {
text-transform: uppercase;
background-color: #ffffff !important;
color: #333333;
}
.navbar-default .navbar-nav > li > a:hover {
color: #3381d0;
}
.navbar-default .navbar-nav>li>a:hover,
.navbar-default .navbar-nav>.active>a,
.navbar-default .navbar-nav>.active>a:focus,
.navbar-default .navbar-nav>.active>a:hover {
background-color: #ffffff;
border-bottom: 2px solid #ff5d1c;
color: #ff5d1c;
bottom: -2px;
}
.nav>li {
position: static !important;
}
/* For navbar dropdown*/
.navbar .dropdown-menu {
min-width: 1349px;
width: 100%;
height: 120px;
margin-top: 51px;
z-index: 1;
left: 0;
text-align: center;
padding-right: 10px;
position: absolute;
list-style-type: none;
border-top: 2px solid #ff5d1c;
border-bottom: 2px solid #333333;
border-right: #ffffff;
border-radius: 0;
box-shadow: 0px 2px 8px rgba(0, 0, 0, 0.1);
border-left: 0;
background-color: #337ab7;
}
.dropdown-menu {
padding-left: 10px;
padding-right: 10px;
position: relative;
list-style-type: none;
}
.navbar .dropdown-menu li {
margin: 0;
padding: 0;
display: inline-block;
}
.dropdown-menu > li > a {
color: #ffffff;
line-height: 75px;
padding: 3px;
}
.dropdown-menu > li > a:hover {
color: #333333 !important;
}
.dropdown-menu > li > a:hover {
color: #ffffff;
background-color: #337ab7;
}
.m-pub {
display: inline-block;
margin: 3px 40px 0;
font-size: 13px;
font-weight: 400;
text-transform: uppercase;
letter-spacing: .14em;
color: white;
-webkit-transition: none;
-moz-transition: none;
-ms-transition: none;
-o-transition: none;
transition: none;
position: relative;
}
.m-pub:after,
.m-pub:focus {
color: #ffffff;
background-color: #337ab7;
}
.dropdown-menu li .m-pub:hover:after {
content: '';
position: absolute;
left: 50%;
margin-left: -10px;
margin-top: 55px;
border-left: 0;
border-bottom: 17px solid transparent;
border-top: 17px solid transparent;
border-left: 14px solid #333333;
transform: rotate(-90deg);
background: none;
}
nav.navbar.open {
margin-bottom: 120px;
}
<head>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
<nav class="navbar navbar-default navbar-static-top">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle Navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#"></a>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav" id="nav">
<li class="nav-link active"><a href="#">Link</a>
</li>
<li class="nav-link"><a href="#">Link</a>
</li>
<li class="nav-link"><a href="#">Link</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" id="menu-trigger">Drop-Down Menu<i class="fa fa-angle-down flipped"></i></a>
<ul class="dropdown-menu" id="menu">
<li class="nav-link">
<a href="#" class="m-pub"><i class="fa fa-microphone fa-2x"></i>Option</a>
</li>
<li class="nav-link">
<a href="" class="m-pub"><i class="fa fa-newspaper-o fa-2x"></i>Option</a>
</li>
</ul>
</li>
<li class="nav-link"><a href="#">Link</a>
</li>
<li class="nav-link"><a href="#">Link</a>
</li>
</ul>
</div>
</div>
</nav>
<div class="container" style="background: red;height:100px; width: 100%;">
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
</body>
该代码段足够小,足以适应移动视图,因此您需要全屏查看它。或者您可以查看codepen http://codepen.io/anon/pen/XbBPPY.
请注意,您添加的一些样式.dropdown-menu
破坏了移动版本,因此您可能想看一下它们,或者添加一些媒体查询来修复它们。
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