我在使用此导航栏时出现问题。我无法将这些导航标签对齐到中心。有谁可以帮助我吗？我已尽力改变这一切......
----这是html ----
<!doctype html>
<html lang=''>
<head>
<meta charset='utf-8'>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="styles.css">
<script src="http://code.jquery.com/jquery-latest.min.js" type="text/javascript"></script>
<script src="script.js"></script>
<title>CSS MenuMaker</title>
</head>
<body>
<div id='cssmenu'>
<ul>
<li class='active'><a href='#'>Home</a></li>
<li><a href='#'>Products</a></li>
<li><a href='#'>Company</a></li>
<li><a href='#'>Contact</a></li>
</ul>
</div>
</body>
<html>
----这是css ----
@import url(http://fonts.googleapis.com/css?family=Raleway);
#cssmenu,
#cssmenu ul,
#cssmenu ul li,
#cssmenu ul li a,
#cssmenu #menu-button {
margin: 0;
padding: 0;
border: 0;
list-style: none;
line-height: 1;
display: block;
position: relative;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
#cssmenu:after,
#cssmenu > ul:after {
content: ".";
display: block;
clear: both;
visibility: hidden;
line-height: 0;
height: 0;
}
#cssmenu #menu-button {
display: none;
}
#cssmenu {
width: auto;
font-family: Raleway, sans-serif;
line-height: 1;
}
#cssmenu > ul {
background: #3db2e1;
}
#cssmenu > ul > li {
float: left;
-webkit-perspective: 1000px;
-moz-perspective: 1000px;
perspective: 1000px;
}
#cssmenu.align-center > ul {
font-size: 0;
text-align: center;
}
#cssmenu.align-center > ul > li {
display: inline-block;
float: none;
}
#cssmenu.align-right > ul > li {
float: right;
}
#cssmenu > ul > li > a {
padding: 16px 20px;
font-size: 14px;
color: #ffffff;
letter-spacing: 1px;
text-transform: uppercase;
text-decoration: none;
background: #3db2e1;
-webkit-transition: all .3s;
-moz-transition: all .3s;
-o-transition: all .3s;
transition: all .3s;
-webkit-transform-origin: 50% 0;
-moz-transform-origin: 50% 0;
transform-origin: 50% 0;
-webkit-transform-style: preserve-3d;
-moz-transform-style: preserve-3d;
transform-style: preserve-3d;
}
#cssmenu > ul > li.active > a {
color: #dff2fa;
}
#cssmenu > ul > li:hover > a,
#cssmenu > ul > li > a:hover {
color: #dff2fa;
-webkit-transform: rotateX(90deg) translateY(-23px);
-moz-transform: rotateX(90deg) translateY(-23px);
transform: rotateX(90deg) translateY(-23px);
-ms-transform: none;
}
#cssmenu > ul > li > a::before {
position: absolute;
top: 100%;
left: 0;
z-index: -1;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
width: 100%;
height: 100%;
padding: 16px 20px;
color: #dff2fa;
background: #19799f;
content: attr(data-title);
-webkit-transition: background 0.3s;
-moz-transition: background 0.3s;
transition: background 0.3s;
-webkit-transform: rotateX(-90deg);
-moz-transform: rotateX(-90deg);
transform: rotateX(-90deg);
-webkit-transform-origin: 50% 0;
-moz-transform-origin: 50% 0;
transform-origin: 50% 0;
-ms-transform: translateY(- -18px);
}
#cssmenu > ul > li:hover > a::before,
#cssmenu > ul > li > a:hover::before {
background: #3db2e1;
}
#cssmenu.small-screen {
width: 100%;
}
#cssmenu.small-screen > ul,
#cssmenu.small-screen.align-center > ul {
width: 100%;
text-align: left;
}
#cssmenu.small-screen > ul > li,
#cssmenu.small-screen.align-center {
float: none;
display: block;
border-top: 1px solid rgba(100, 100, 100, 0.1);
}
#cssmenu.small-screen > ul > li:hover > a,
#cssmenu.small-screen > ul > li > a:hover {
color: #dff2fa;
-webkit-transform: none;
-moz-transform: none;
transform: none;
-ms-transform: none;
}
#cssmenu.small-screen > ul > li > a::before {
display: none;
}
#cssmenu.small-screen #menu-button {
display: block;
padding: 16px 20px;
cursor: pointer;
font-size: 14px;
text-decoration: none;
color: #ffffff;
text-transform: uppercase;
letter-spacing: 1px;
background: #3db2e1;
}
#cssmenu.small-screen #menu-button:after {
content: "";
position: absolute;
right: 20px;
top: 17px;
display: block;
-webkit-box-sizing: content-box;
-moz-box-sizing: content-box;
box-sizing: content-box;
border-top: 2px solid #ffffff;
border-bottom: 2px solid #ffffff;
width: 22px;
height: 3px;
}
#cssmenu.small-screen #menu-button.menu-opened:after {
border-top: 2px solid #dff2fa;
border-bottom: 2px solid #dff2fa;
}
#cssmenu.small-screen #menu-button:before {
content: "";
position: absolute;
right: 20px;
top: 27px;
display: block;
width: 22px;
height: 2px;
background: #ffffff;
}
#cssmenu.small-screen #menu-button.menu-opened:before {
background: #dff2fa;
}
----这是js ----
(function($) {
$.fn.menumaker = function(options) {
var cssmenu = $(this), settings = $.extend({
title: "Menu",
format: "dropdown",
breakpoint: 768,
sticky: false
}, options);
return this.each(function() {
cssmenu.find('li ul').parent().addClass('has-sub');
if (settings.format != 'select') {
cssmenu.prepend('<div id="menu-button">' + settings.title + '</div>');
$(this).find("#menu-button").on('click', function(){
$(this).toggleClass('menu-opened');
var mainmenu = $(this).next('ul');
if (mainmenu.hasClass('open')) {
mainmenu.hide().removeClass('open');
}
else {
mainmenu.show().addClass('open');
if (settings.format === "dropdown") {
mainmenu.find('ul').show();
}
}
});
multiTg = function() {
cssmenu.find(".has-sub").prepend('<span class="submenu-button"></span>');
cssmenu.find('.submenu-button').on('click', function() {
$(this).toggleClass('submenu-opened');
if ($(this).siblings('ul').hasClass('open')) {
$(this).siblings('ul').removeClass('open').hide();
}
else {
$(this).siblings('ul').addClass('open').show();
}
});
};
if (settings.format === 'multitoggle') multiTg();
else cssmenu.addClass('dropdown');
}
else if (settings.format === 'select')
{
cssmenu.append('<select style="width: 100%"/>').addClass('select-list');
var selectList = cssmenu.find('select');
selectList.append('<option>' + settings.title + '</option>', {
"selected": "selected",
"value": ""});
cssmenu.find('a').each(function() {
var element = $(this), indentation = "";
for (i = 1; i < element.parents('ul').length; i++)
{
indentation += '-';
}
selectList.append('<option value="' + $(this).attr('href') + '">' + indentation + element.text() + '</option');
});
selectList.on('change', function() {
window.location = $(this).find("option:selected").val();
});
}
if (settings.sticky === true) cssmenu.css('position', 'fixed');
resizeFix = function() {
if ($(window).width() > settings.breakpoint) {
cssmenu.find('ul').show();
cssmenu.removeClass('small-screen');
if (settings.format === 'select') {
cssmenu.find('select').hide();
}
else {
cssmenu.find("#menu-button").removeClass("menu-opened");
}
}
if ($(window).width() <= settings.breakpoint && !cssmenu.hasClass("small-screen")) {
cssmenu.find('ul').hide().removeClass('open');
cssmenu.addClass('small-screen');
if (settings.format === 'select') {
cssmenu.find('select').show();
}
}
};
resizeFix();
return $(window).on('resize', resizeFix);
});
};
})(jQuery);
(function($){
$(document).ready(function(){
$(document).ready(function() {
$("#cssmenu").menumaker({
title: "Menu",
format: "dropdown"
});
$("#cssmenu a").each(function() {
var linkTitle = $(this).text();
$(this).attr('data-title', linkTitle);
});
});
});
})(jQuery);
答案 0 :(得分：2)
问题是有一个叫做“对齐中心”的课程
#cssmenu.align-center > ul {
font-size: 0;
text-align: center;
}
#cssmenu.align-center > ul > li {
display: inline-block;
float:none;
}
你还没有使用它。所以你只需要将class="align-center"添加到<div id="cssmenu">。它应该看起来像<div id="cssmenu" class="align-center">，保存并刷新页面。您可以从here了解其工作原理。
如果我帮助你，请将答案标记为已选中，谢谢：）