我已经使用html，css和bootstrap创建了导航栏。将鼠标悬停在菜单项上时，会出现下拉菜单，但是当我将光标移至下拉菜单时，它就会消失。我试过了display：块。但是，无法执行。有人可以帮我解决此问题。这将带来巨大的帮助。
.navbar{
position:relative;
}
.navbar:before {
content: '';
position: absolute;
width: 0;
height: 0;
border-style: solid;
border-width: 10px 12.5px 0 12.5px;
border-color: #fff transparent transparent transparent;
left: 55px;
top: 99%;
-webkit-transform: translateY(0) scale(1);
transform: translateY(0) scale(1);
-webkit-transition: -webkit-transform 337ms ease-in-out;
transition: -webkit-transform 337ms ease-in-out;
transition: transform 337ms ease-in-out;
transition: transform 337ms ease-in-out,-webkit-transform 337ms ease-in-out;
}
nav .navbar-nav .nav-item .nav-link{
line-height:59px;
-webkit-transition: background-color 1s;
-moz-transition: background-color 1s;
-o-transition: background-color 1s;
transition: background-color 1s;
}
nav .navbar-nav .nav-item .nav-link:hover, .dropdown:hover .dropbtn{
background-color: #f1c575;
}
nav ul li:hover > .nav-link {
background-color: #f1c575;
color: #FFF;
}
nav .navbar-nav .nav-item .nav-link {
position: relative;
}
nav .navbar-nav .nav-item:hover .nav-link:before {
content: "";
display: block;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 10px solid #7B8B93;
position: absolute;
left: 35%;
bottom: 0px;
}
/* Navbar Ends */
/* Nav Menu Starts */
.dropdown-content {
display: none !important;
position: absolute;
background-color: #7b8b93;
width: 100%;
left: 0;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
padding-top:20px;
padding-bottom:40px;
}
nav .navbar-nav .nav-item .nav-link:hover + .dropdown-content{
display:block !important;
}
.dropdown-content li:first-child, .dropdown-content li:last-child{
font-size:18px;
}
.dropdown-content li a{
text-decoration:none;
color:#fff;
}
/* Nav Menu Ends*/<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="./index.html">LoGO</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" id="navbarSupportedContent">
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link" href="./index.html">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Capabilities</a>
<ul class="list-inline dropdown-content">
<li class="list-inline-item list-left-items">
<a href="#">Products</a>
<ul class="open-source">
<li><a>Magento</a></li>
<li><a>IBM v9 Commerce</a></li>
<li><a>Drupal</a></li>
</ul>
</li>
<li class="list-inline-item list-right-items">
<a href="#"> Product Categories</a>
<ul class="list-categories">
<li class="one">
<a href="./eCommerce.html" title="E-Commerce">
<img class="make-white" src="./images/aoe_icons_services_order_management.svg" alt="E-Commerce">
<span class="service-title">E-Commerce</span>
</a>
</li>
<li class="two">
<a title="Content Management" href="#">
<img class="make-white" src="./images/aoe_icons_webportal.svg" alt="Content Management">
<span class="service-title">Content Management</span>
</a>
</li>
<li class="three">
<a title="Middleware & ESB" href="#">
<img class="make-white" src="./images/Plattform1.svg" alt="Middleware & ESB">
<span class="service-title">Middleware & ESB</span>
</a>
</li>
<li class="one">
<a title="Search & Recommendation" href="#">
<img class="make-white" src="./images/Search2.svg" alt="Search & Recommendation">
<span class="service-title">Search & Recommendation</span>
</a>
</li>
<li class="three">
<a title="Identity & Access Management" href="#">
<img class="make-white" src="./images/aoe_icons_technologies-13.svg" alt="Identity">
<span class="service-title">PIM Systems</span>
</a>
</li>
<li class="three">
<a title="Identity & Access Management" href="#">
<img class="make-white" src="./images/aoe_icons_technologies-13.svg" alt="Identity & Access Management">
<span class="service-title">Identity & Access Management</span>
</a>
</li>
<li class="one">
<a title="Development Frameworks" href="#">
<img class="make-white" src="./images/aoe_icons_betrieb.svg" alt="Development Frameworks">
<span class="service-title">Development Frameworks</span>
</a>
</li>
<li class="two">
<a title="CRM Systems" href="#">
<img class="make-white" src="./images/aoe_icons_crm_2.svg" alt="CRM Systems">
<span class="service-title">CRM Systems</span>
</a>
</li>
<li class="three">
<a title="Databases & Storage" href="#">
<img class="make-white" src="./images/aoe_icons_Effiziente_Datenverwaltung.svg" alt="Databases & Storage">
<span class="service-title">Databases & Storage</span>
</a>
</li>
<li class="one">
<a title="Mobile Frameworks" href="#">
<img class="make-white" src="./images/aoe_icons_mobile-02.svg" alt="Mobile Frameworks">
<span class="service-title">Mobile Frameworks</span>
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Solutions</a>
<ul class="list-inline dropdown-content">
<li class="list-inline-item list-left-items">
<a href="#">Solutions</a>
<ul class="open-source">
<li class="commerce"><a>Dr.Commerce</a></li>
<li class="universal"><a>Universal Commerce</a></li>
<li class="emmerging"><a>Emmerging Techlogies</a></li>
</ul>
</li>
<li class="list-inline-item list-right-items">
<a href="#"> Services & Technologies</a>
<ul class="list-categories">
<li class="one">
<a href="#" title="E-Commerce">
<img class="make-white" src="./images/Strategy2.svg">
<span class="service-title">Strategy & Consulting</span>
</a>
</li>
<li class="two">
<a title="Content Management" href="#">
<img class="make-white" src="./images/Design1.svg">
<span class="service-title">UX & Design</span>
</a>
</li>
<li class="three">
<a title="Middleware & ESB" href="#">
<img class="make-white" alt="Software Architecture" src="./images/aoe_icons_Software_Architektur.svg">
<span class="service-title">Software Architecture</span>
</a>
</li>
<li class="one">
<a title="Search & Recommendation" href="#">
<img class="make-white" src="./images/aoe_icons_betrieb.svg">
<span class="service-title">Agile Development</span>
</a>
</li>
<li class="two">
<a title="PIM Systems" href="#">
<img class="make-white" alt="Digital Products" src="./images/Digitization2.svg">
<span class="service-title">Digital Products</span>
</a>
</li>
<li class="three">
<a title="Identity & Access Management" href="#">
<img class="make-white" alt="Payment & Fulfillment" src="./images/aoe_icons_services_payment.svg">
<span class="service-title">Payment & Fulfillment</span>
</a>
</li>
<li class="one">
<a title="Development Frameworks" href="#">
<img class="make-white" alt="Systems Integration" src="./images/Integration1.svg">
<span class="service-title">Systems Integration</span>
</a>
</li>
<li class="two">
<a title="CRM Systems" href="#">
<img class="make-white" alt="DevOps & Operations" src="./images/aoe_icons_Continuous_Deployment.svg">
<span class="service-title">DevOps & Operations</span>
</a>
</li>
<li class="three">
<a title="Databases & Storage" href="#">
<img class="make-white" alt="Customer Care" src="./images/aoe_icons_Customer_Care.svg">
<span class="service-title">Customer Care</span>
</a>
</li>
<li class="one">
<a title="Mobile Frameworks" href="#">
<img class="make-white" src="./images/aoe_icons_mobile-02.svg" alt="Mobile Frameworks">
<span class="service-title">Mobile Frameworks</span>
</a>
</li>
<li class="two">
<a title="Portal" href="#">
<img class="make-white" alt="Portals & Applications" src="./images/aoe_icons_web_and_mobile_applications.svg">
<span class="service-title">Portals & Applications</span>
</a>
</li>
<li class="three">
<a title="CMS Solutions" href="#">
<img class="make-white" alt="CMS Solutions" src="./images/aoe_icons_web_content_management.svg">
<span class="service-title">CMS Solutions</span>
</a>
</li>
<li class="one">
<a title="Middle Ware" href="#">
<img class="make-white" alt="ESB & Middleware" src="./images/Plattform1.svg">
<span class="service-title">ESB & Middleware</span>
</a>
</li>
<li class="two">
<a title="CRM Integration" href="#">
<img class="make-white" alt="CRM Integration" src="./images/aoe_icons_crm_2.svg">
<span class="service-title">CRM Integration</span>
</a>
</li>
<li class="three">
<a title="Identity" href="#">
<img class="make-white" src="./images/aoe_icons_technologies_IRM.svg">
<span class="service-title">Identity & Access Mngmt</span>
</a>
</li>
<li class="one">
<a title="Search" href="#">
<img class="make-white" alt="Search" src="./images/Search2.svg">
<span class="service-title">Search</span>
</a>
</li>
<li class="two">
<a title="E-Commerce" href="#">
<img class="make-white" alt="E-Commerce" src="./images/aoe_icons_services_order_management.svg">
<span class="service-title">E-Commerce</span>
</a>
</li>
<li class="three">
<a title="Mobile Apps" href="#">
<img class="make-white" alt="Mobile Apps" src="./images/aoe_icons_web_and_mobile_applications.svg">
<span class="service-title">Mobile Apps</span>
</a>
</li>
<li class="one">
<a title="PIM Systems" href="#">
<img class="make-white" alt="PIM Systems" src="./images/aoe_icons_technologies-13.svg">
<span class="service-title">PIM Systems</span>
</a>
</li>
</ul>
<p class="text-center mt-5"><a class="btn btn-custom">View All</a></p>
</li>
</ul>
</li>
</ul>
</div>
</nav>
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答案 0 :(得分：0)
只需更改此css，这将使li处于可悬浮状态，并且如果光标移出锚点.nav-link，则不会处于悬浮状态
nav .navbar-nav .nav-item:hover .dropdown-content{
display:block !important;
}
.navbar{
position:relative;
}
.navbar:before {
content: '';
position: absolute;
width: 0;
height: 0;
border-style: solid;
border-width: 10px 12.5px 0 12.5px;
border-color: #fff transparent transparent transparent;
left: 55px;
top: 99%;
-webkit-transform: translateY(0) scale(1);
transform: translateY(0) scale(1);
-webkit-transition: -webkit-transform 337ms ease-in-out;
transition: -webkit-transform 337ms ease-in-out;
transition: transform 337ms ease-in-out;
transition: transform 337ms ease-in-out,-webkit-transform 337ms ease-in-out;
}
nav .navbar-nav .nav-item .nav-link{
line-height:59px;
-webkit-transition: background-color 1s;
-moz-transition: background-color 1s;
-o-transition: background-color 1s;
transition: background-color 1s;
}
nav .navbar-nav .nav-item .nav-link:hover, .dropdown:hover .dropbtn{
background-color: #f1c575;
}
nav ul li:hover > .nav-link {
background-color: #f1c575;
color: #FFF;
}
nav .navbar-nav .nav-item .nav-link {
position: relative;
}
nav .navbar-nav .nav-item:hover .nav-link:before {
content: "";
display: block;
border-left: 10px solid transparent;
border-right: 10px solid transparent;
border-bottom: 10px solid #7B8B93;
position: absolute;
left: 35%;
bottom: 0px;
}
/* Navbar Ends */
/* Nav Menu Starts */
.dropdown-content {
display: none !important;
position: absolute;
background-color: #7b8b93;
width: 100%;
left: 0;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
padding-top:20px;
padding-bottom:40px;
}
nav .navbar-nav .nav-item:hover .dropdown-content{
display:block !important;
}
.dropdown-content li:first-child, .dropdown-content li:last-child{
font-size:18px;
}
.dropdown-content li a{
text-decoration:none;
color:#fff;
}
/* Nav Menu Ends*/<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="./index.html">LoGO</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" id="navbarSupportedContent">
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link" href="./index.html">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Capabilities</a>
<ul class="list-inline dropdown-content">
<li class="list-inline-item list-left-items">
<a href="#">Products</a>
<ul class="open-source">
<li><a>Magento</a></li>
<li><a>IBM v9 Commerce</a></li>
<li><a>Drupal</a></li>
</ul>
</li>
<li class="list-inline-item list-right-items">
<a href="#"> Product Categories</a>
<ul class="list-categories">
<li class="one">
<a href="./eCommerce.html" title="E-Commerce">
<img class="make-white" src="./images/aoe_icons_services_order_management.svg" alt="E-Commerce">
<span class="service-title">E-Commerce</span>
</a>
</li>
<li class="two">
<a title="Content Management" href="#">
<img class="make-white" src="./images/aoe_icons_webportal.svg" alt="Content Management">
<span class="service-title">Content Management</span>
</a>
</li>
<li class="three">
<a title="Middleware & ESB" href="#">
<img class="make-white" src="./images/Plattform1.svg" alt="Middleware & ESB">
<span class="service-title">Middleware & ESB</span>
</a>
</li>
<li class="one">
<a title="Search & Recommendation" href="#">
<img class="make-white" src="./images/Search2.svg" alt="Search & Recommendation">
<span class="service-title">Search & Recommendation</span>
</a>
</li>
<li class="three">
<a title="Identity & Access Management" href="#">
<img class="make-white" src="./images/aoe_icons_technologies-13.svg" alt="Identity">
<span class="service-title">PIM Systems</span>
</a>
</li>
<li class="three">
<a title="Identity & Access Management" href="#">
<img class="make-white" src="./images/aoe_icons_technologies-13.svg" alt="Identity & Access Management">
<span class="service-title">Identity & Access Management</span>
</a>
</li>
<li class="one">
<a title="Development Frameworks" href="#">
<img class="make-white" src="./images/aoe_icons_betrieb.svg" alt="Development Frameworks">
<span class="service-title">Development Frameworks</span>
</a>
</li>
<li class="two">
<a title="CRM Systems" href="#">
<img class="make-white" src="./images/aoe_icons_crm_2.svg" alt="CRM Systems">
<span class="service-title">CRM Systems</span>
</a>
</li>
<li class="three">
<a title="Databases & Storage" href="#">
<img class="make-white" src="./images/aoe_icons_Effiziente_Datenverwaltung.svg" alt="Databases & Storage">
<span class="service-title">Databases & Storage</span>
</a>
</li>
<li class="one">
<a title="Mobile Frameworks" href="#">
<img class="make-white" src="./images/aoe_icons_mobile-02.svg" alt="Mobile Frameworks">
<span class="service-title">Mobile Frameworks</span>
</a>
</li>
</ul>
</li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Solutions</a>
<ul class="list-inline dropdown-content">
<li class="list-inline-item list-left-items">
<a href="#">Solutions</a>
<ul class="open-source">
<li class="commerce"><a>Dr.Commerce</a></li>
<li class="universal"><a>Universal Commerce</a></li>
<li class="emmerging"><a>Emmerging Techlogies</a></li>
</ul>
</li>
<li class="list-inline-item list-right-items">
<a href="#"> Services & Technologies</a>
<ul class="list-categories">
<li class="one">
<a href="#" title="E-Commerce">
<img class="make-white" src="./images/Strategy2.svg">
<span class="service-title">Strategy & Consulting</span>
</a>
</li>
<li class="two">
<a title="Content Management" href="#">
<img class="make-white" src="./images/Design1.svg">
<span class="service-title">UX & Design</span>
</a>
</li>
<li class="three">
<a title="Middleware & ESB" href="#">
<img class="make-white" alt="Software Architecture" src="./images/aoe_icons_Software_Architektur.svg">
<span class="service-title">Software Architecture</span>
</a>
</li>
<li class="one">
<a title="Search & Recommendation" href="#">
<img class="make-white" src="./images/aoe_icons_betrieb.svg">
<span class="service-title">Agile Development</span>
</a>
</li>
<li class="two">
<a title="PIM Systems" href="#">
<img class="make-white" alt="Digital Products" src="./images/Digitization2.svg">
<span class="service-title">Digital Products</span>
</a>
</li>
<li class="three">
<a title="Identity & Access Management" href="#">
<img class="make-white" alt="Payment & Fulfillment" src="./images/aoe_icons_services_payment.svg">
<span class="service-title">Payment & Fulfillment</span>
</a>
</li>
<li class="one">
<a title="Development Frameworks" href="#">
<img class="make-white" alt="Systems Integration" src="./images/Integration1.svg">
<span class="service-title">Systems Integration</span>
</a>
</li>
<li class="two">
<a title="CRM Systems" href="#">
<img class="make-white" alt="DevOps & Operations" src="./images/aoe_icons_Continuous_Deployment.svg">
<span class="service-title">DevOps & Operations</span>
</a>
</li>
<li class="three">
<a title="Databases & Storage" href="#">
<img class="make-white" alt="Customer Care" src="./images/aoe_icons_Customer_Care.svg">
<span class="service-title">Customer Care</span>
</a>
</li>
<li class="one">
<a title="Mobile Frameworks" href="#">
<img class="make-white" src="./images/aoe_icons_mobile-02.svg" alt="Mobile Frameworks">
<span class="service-title">Mobile Frameworks</span>
</a>
</li>
<li class="two">
<a title="Portal" href="#">
<img class="make-white" alt="Portals & Applications" src="./images/aoe_icons_web_and_mobile_applications.svg">
<span class="service-title">Portals & Applications</span>
</a>
</li>
<li class="three">
<a title="CMS Solutions" href="#">
<img class="make-white" alt="CMS Solutions" src="./images/aoe_icons_web_content_management.svg">
<span class="service-title">CMS Solutions</span>
</a>
</li>
<li class="one">
<a title="Middle Ware" href="#">
<img class="make-white" alt="ESB & Middleware" src="./images/Plattform1.svg">
<span class="service-title">ESB & Middleware</span>
</a>
</li>
<li class="two">
<a title="CRM Integration" href="#">
<img class="make-white" alt="CRM Integration" src="./images/aoe_icons_crm_2.svg">
<span class="service-title">CRM Integration</span>
</a>
</li>
<li class="three">
<a title="Identity" href="#">
<img class="make-white" src="./images/aoe_icons_technologies_IRM.svg">
<span class="service-title">Identity & Access Mngmt</span>
</a>
</li>
<li class="one">
<a title="Search" href="#">
<img class="make-white" alt="Search" src="./images/Search2.svg">
<span class="service-title">Search</span>
</a>
</li>
<li class="two">
<a title="E-Commerce" href="#">
<img class="make-white" alt="E-Commerce" src="./images/aoe_icons_services_order_management.svg">
<span class="service-title">E-Commerce</span>
</a>
</li>
<li class="three">
<a title="Mobile Apps" href="#">
<img class="make-white" alt="Mobile Apps" src="./images/aoe_icons_web_and_mobile_applications.svg">
<span class="service-title">Mobile Apps</span>
</a>
</li>
<li class="one">
<a title="PIM Systems" href="#">
<img class="make-white" alt="PIM Systems" src="./images/aoe_icons_technologies-13.svg">
<span class="service-title">PIM Systems</span>
</a>
</li>
</ul>
<p class="text-center mt-5"><a class="btn btn-custom">View All</a></p>
</li>
</ul>
</li>
</ul>
</div>
</nav>
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