下拉菜单隐藏在图片后面
当向下滚动导航栏时，“我的下拉菜单”隐藏在图像后面（猫头鹰食肉动物），然后悬停正常工作。
仅在显示图像的上方区域显示问题。
我尝试通过给定z-index。通过为导航栏提供比图像滑块更高的值。但这是行不通的。
我也尝试了溢出值。
我给了溢出：可见；到导航栏，但仍然不可见。
错误下拉菜单的屏幕截图
jQuery(document).ready(function($) {
$("#owl-demo").owlCarousel({
navigation : true,
slideSpeed : 300,
paginationSpeed : 500,
items: 1,
singleItem: true,
autoPlay : 4000
});
});
$('body').on('mouseenter mouseleave','.dropdown',function(e){
var _d=$(e.target).closest('.dropdown');
_d.addClass('show');
setTimeout(function(){
_d[_d.is(':hover')?'addClass':'removeClass']('show');
$('[data-toggle="dropdown"]', _d).attr('aria-expanded',_d.is(':hover'));
},300);
});/*sticky header position*/
.sticky.is-sticky {
position: fixed;
left: 0;
right: 0;
top: 0;
z-index: 999;
width: 100%;
}
header {
background: transparent !important;
}
/*body {*/
/*min-height: 1200px;*/
/*}*/
nav {
background-color: #000000;
min-height: 85px;
color: white;
opacity: 0.7;
}
.dropdown:hover>.dropdown-menu {
display: block;
overflow: visible;
z-index: 1000;
position: inherit;
margin-top: 10%;
}
nav ul li a {
color: white !important;
}
.top-div {
font-size: 14px;
background-color: black;
color: white;
padding-top: 10px;
}
.top-div p .fa-map-marker{
margin-left: 4%;
}
.top-div p i {
margin-right: 0.5%;
margin-left: 3%;
color: #c6b52d;
}
/* Ow; Slider CSS*/
#owl-demo {
z-index: 30;
}
.owl-wrapper {
positon: relative;
}
.owl-controls {
position: absolute;
bottom: 10px;
left: 0;
right: 0;
margin-left: auto;
margin-right: auto;
}
.owl-theme .owl-controls .owl-page span {
background: #fff !important;
}
.owl-img {
width: 100%;
}
.owl-text-overlay {
position: absolute;
text-align: center;
width: 60%;
top: 50%;
transform: translateY(-50%);
left: 0;
right: 0;
margin-left: auto;
margin-right: auto;
color: #fff;
background-color: rgba(0, 0, 0, 0.4);
background: rgba(0, 0, 0, 0.4);
padding-bottom: 20px;
font-family: "Open Sans", sans-serif;
border-radius: 15px 50px 30px 5px;
}<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Imagine</title>
<link href="https://fonts.googleapis.com/css?family=Ubuntu:300,400,800" rel="stylesheet">
<link rel="stylesheet" href="main.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.theme.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.js"></script>
</head>
<body>
<!--top header-->
<header>
<!--most top info -->
<!--<div style="height: 40px; background: red"></div>-->
<!-- End most top info -->
<nav class="navbar navbar-expand-lg navbar-light top-navbar" data-toggle="sticky-onscroll">
<div class="container">
<a class="navbar-brand" href="#">
<img src="assets/images/Logo-white.png" height="70" alt="">
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse justify-content-end" id="navbarSupportedContent">
<ul class="navbar-nav pull-right">
<li class="nav-item">
<a class="nav-link active" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="about-us.html">Who We Are</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown link
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Support & Service</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact Us</a>
</li>
</ul>
</div>
</div>
</nav>
</header>
<div class="owl-carousel owl-theme" id="owl-demo">
<div>
<div class="owl-text-overlay hidden-xs">
<h2 class="owl-title">Arrow</h2>
<p class="owl-caption hidden-sm">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent iaculis purus vel enim suscipit, vitae volutpat ante scelerisque. Pellentesque blandit malesuada dui, sed aliquet risus molestie non.</p>
</div><img class="owl-img" src="https://res.cloudinary.com/jbennett45/image/upload/v1474628443/arrow_dqnmmf.jpg"></div>
<div>
<div class="owl-text-overlay hidden-xs">
<h2 class="owl-title">Flash</h2>
<p class="owl-caption hidden-sm">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent iaculis purus vel enim suscipit, vitae volutpat ante scelerisque. Pellentesque blandit malesuada dui, sed aliquet risus molestie non.</p>
</div><img class="owl-img" src="https://res.cloudinary.com/jbennett45/image/upload/v1474628444/flash_pxythx.jpg"></div>
</div>
4 个答案:
答案 0 :(得分：2)
将z-index添加到nav。
z-index属性指定元素的堆叠顺序。
jQuery(document).ready(function($) {
$("#owl-demo").owlCarousel({
navigation : true,
slideSpeed : 300,
paginationSpeed : 500,
items: 1,
singleItem: true,
autoPlay : 4000
});
});
$('body').on('mouseenter mouseleave','.dropdown',function(e){
var _d=$(e.target).closest('.dropdown');
_d.addClass('show');
setTimeout(function(){
_d[_d.is(':hover')?'addClass':'removeClass']('show');
$('[data-toggle="dropdown"]', _d).attr('aria-expanded',_d.is(':hover'));
},300);
});/*sticky header position*/
.sticky.is-sticky {
position: fixed;
left: 0;
right: 0;
top: 0;
z-index: 999;
width: 100%;
}
header {
background: transparent !important;
}
/*body {*/
/*min-height: 1200px;*/
/*}*/
nav {
background-color: #000000;
min-height: 85px;
color: white;
opacity: 0.7;
z-index: 999999; //Add this
}
.dropdown:hover>.dropdown-menu {
display: block;
overflow: visible;
z-index: 1000;
position: inherit;
margin-top: 10%;
}
nav ul li a {
color: white !important;
}
.top-div {
font-size: 14px;
background-color: black;
color: white;
padding-top: 10px;
}
.top-div p .fa-map-marker{
margin-left: 4%;
}
.top-div p i {
margin-right: 0.5%;
margin-left: 3%;
color: #c6b52d;
}
/* Ow; Slider CSS*/
#owl-demo {
z-index: 30;
}
.owl-wrapper {
positon: relative;
}
.owl-controls {
position: absolute;
bottom: 10px;
left: 0;
right: 0;
margin-left: auto;
margin-right: auto;
}
.owl-theme .owl-controls .owl-page span {
background: #fff !important;
}
.owl-img {
width: 100%;
}
.owl-text-overlay {
position: absolute;
text-align: center;
width: 60%;
top: 50%;
transform: translateY(-50%);
left: 0;
right: 0;
margin-left: auto;
margin-right: auto;
color: #fff;
background-color: rgba(0, 0, 0, 0.4);
background: rgba(0, 0, 0, 0.4);
padding-bottom: 20px;
font-family: "Open Sans", sans-serif;
border-radius: 15px 50px 30px 5px;
}<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Imagine</title>
<link href="https://fonts.googleapis.com/css?family=Ubuntu:300,400,800" rel="stylesheet">
<link rel="stylesheet" href="main.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.theme.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.js"></script>
</head>
<body>
<!--top header-->
<header>
<!--most top info -->
<!--<div style="height: 40px; background: red"></div>-->
<!-- End most top info -->
<nav class="navbar navbar-expand-lg navbar-light top-navbar" data-toggle="sticky-onscroll">
<div class="container">
<a class="navbar-brand" href="#">
<img src="assets/images/Logo-white.png" height="70" alt="">
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse justify-content-end" id="navbarSupportedContent">
<ul class="navbar-nav pull-right">
<li class="nav-item">
<a class="nav-link active" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="about-us.html">Who We Are</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown link
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Support & Service</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Contact Us</a>
</li>
</ul>
</div>
</div>
</nav>
</header>
<div class="owl-carousel owl-theme" id="owl-demo">
<div>
<div class="owl-text-overlay hidden-xs">
<h2 class="owl-title">Arrow</h2>
<p class="owl-caption hidden-sm">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent iaculis purus vel enim suscipit, vitae volutpat ante scelerisque. Pellentesque blandit malesuada dui, sed aliquet risus molestie non.</p>
</div><img class="owl-img" src="https://res.cloudinary.com/jbennett45/image/upload/v1474628443/arrow_dqnmmf.jpg"></div>
<div>
<div class="owl-text-overlay hidden-xs">
<h2 class="owl-title">Flash</h2>
<p class="owl-caption hidden-sm">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent iaculis purus vel enim suscipit, vitae volutpat ante scelerisque. Pellentesque blandit malesuada dui, sed aliquet risus molestie non.</p>
</div><img class="owl-img" src="https://res.cloudinary.com/jbennett45/image/upload/v1474628444/flash_pxythx.jpg"></div>
</div>
答案 1 :(得分：1)
您需要将getOrElse添加到 scala> map1 ++ map2.map{ case (k,v: Double) => k -> (v + map1.getOrElse(k,0.0)) }
res2: scala.collection.immutable.Map[Int,Double] = Map(5 -> 6.0, 1 -> 4.5, 6 -> 1.23, 2 -> 3.0, 7 -> 3.0, 3 -> 5.0, 4 -> 8.2
)
类中。这是下拉菜单的整体父项。
只是一个旁注：您可能要更改子菜单项的颜色文本，因为它们目前是白色的，与背景图像匹配并且不可见。
答案 2 :(得分：0)
只需将z-index添加到下拉列表中，它应该大于图片及其父对象的z-index（如果有）。
答案 3 :(得分：0)
如果Z索引不起作用，则另一种可能性是溢出设置为隐藏。刚才我发生了什么。
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