我很难确定如何在不破坏下拉float:left;元素的情况下将此导航菜单居中。
我的演示：http://jsbin.com/tosayosino/1/edit?html,css,js,output
从.jetmenu li中移除li并将菜单置于中心位置，但是当移出移动模式回到桌面模式时会出现问题（菜单保持堆叠而不是浮动{{1} }水平元素。
使用position:relative;然后使用left:50%;和right:50%;来div和ul也可以使事情集中，但是下拉菜单会受到限制到菜单项名称的宽度并将所有子类别压缩在一起（我希望下拉列表是整页宽度）。
我的HTML：
<nav class="hz-cats-menu">
<ul class="jetmenu blue">
<li>
<a href="view_category.asp?cat=CATID">CATEGORY</a>
<div class="megamenu full-width text-center">
<div class="row">
<a href="view_category.asp?cat=CATID"><div class="col1">CATEGORY</div></a>
</div>
</div>
</li>
<li>
<a href="view_category.asp?cat=CATID">CATEGORY</a>
<div class="megamenu full-width text-center">
<div class="row">
<a href="view_category.asp?cat=CATID"><div class="col1">CATEGORY</div></a>
</div>
</div>
</li>
<li>
<a href="view_category.asp?cat=CATID">CATEGORY</a>
<div class="megamenu full-width text-center">
<div class="row">
<a href="view_category.asp?cat=CATID"><div class="col1">CATEGORY</div></a>
</div>
</div>
</li>
</ul>
</nav>
我的CSS：
/*
NAME: Jet Responsive Megamenu
AUTHOR PAGE: http://codecanyon.net/user/marcoarib
ITEM PAGE: http://codecanyon.net/item/jet-responsive-megamenu/5719593
*/
@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,300,300italic,400italic,600,600italic,700,700italic,800,800italic);
@import "font-awesome.css";
/* MENU CONFIGURATION
**********************************************************/
.jetmenu{
width: 100%;
padding: 0;
margin: 0;
position: relative;
float: left;
list-style: none;
background: #333333;
line-height: 1;
}
.jetmenu li{
display: inline-block;
float: left;
}
.jetmenu a{
-o-transition: all .3s linear;
-webkit-transition: all .3s linear;
-moz-transition: all .3s linear;
transition: all .3s linear;
outline: none;
z-index: 10;
}
.jetmenu > li > a{
padding: 10px 25px;
font-family: 'Open Sans', sans-serif;
font-size: 1.5em;
color: #fff;
text-decoration: none;
display: inline-block;
text-transform: uppercase;
font-weight: bold;
}
.jetmenu > li:hover > a,
.jetmenu > li.active > a{
background: #e0e0e0;
color: #555;
}
/* DROPDOWN CONFIGURATION
**********************************************************/
.jetmenu ul.dropdown,
.jetmenu ul.dropdown li ul.dropdown {
list-style: none;
margin: 0;
padding: 0;
display: none;
position: absolute;
z-index: 99;
min-width: 134px;
background: #333333;
}
.jetmenu ul.dropdown{
top: 60px;
}
.jetmenu ul.dropdown li ul.dropdown{
left: 100%;
top: inherit;
}
.jetmenu ul.dropdown li{
clear:both;
width:100%;
font-size: 12px;
}
.jetmenu ul.dropdown li a{
width:100%;
padding: 12px 24px 12px;
display:inline-block;
float:left;
clear:both;
font-family: 'Open Sans', sans-serif;
text-decoration: none;
color: #999;
box-sizing:border-box;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
}
.jetmenu ul.dropdown li:hover > a{
background: #e0e0e0;
color: #555;
}
/* dropdowns to left side */
.jetmenu ul.dropdown li ul.dropdown.left{
left: auto;
right: 100%;
}
/* SUBMENU INDICATORS
**********************************************************/
.jetmenu .indicator{
position: relative;
left: 5px;
top: 0;
font-size: 14px;
float: right;
}
.jetmenu ul li .indicator{
font-size: 12px;
top: 1px;
left: 10px;
}
/* MEGAMENU
**********************************************************/
.jetmenu > li > .megamenu{
position: absolute;
display: none;
background: #fff;
width: 25%;
/* top: 60px; */
font-family: 'Open Sans', sans-serif;
font-size: 12px;
color: #999;
z-index: 99;
padding: 20px 30px 20px;
border: 1px solid #000;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
/* megamenu list */
.jetmenu li > .megamenu ul{
margin: 0 0 20px 0;
float: left;
padding: 0;
display: block;
position: relative;
}
.jetmenu li > .megamenu ul li{
width: 100%;
padding: 4px 0;
}
.jetmenu li > .megamenu ul li.title{
margin: 0 0 8px;
padding: 0 0 5px;
font-size: 14px;
border-bottom: solid 1px #666;
}
/* megamenu h5 */
.jetmenu li > .megamenu h5{
width: 100%;
margin: 0;
padding: 0;
}
/* megamenu links */
.jetmenu li > .megamenu a{
color: #999;
text-decoration: none;
font-size: 12px;
-webkit-transition: color 0.3s linear;
-moz-transition: color 0.3s linear;
-o-transition: color 0.3s linear;
transition: color 0.3s linear;
}
.jetmenu li > .megamenu a:hover{
color: #dedede;
}
/* megamenu images */
.jetmenu .megamenu img{
width: 100%;
-webkit-transition: border 0.3s linear;
-moz-transition: border 0.3s linear;
-o-transition: border 0.3s linear;
transition: border 0.3s linear;
}
/* to fix right attribute on submenus (menu aligned to left (default)) */
.jetmenu > li.fix-sub > .megamenu,
.jetmenu > li.fix-sub > .megamenu.half-width,
.jetmenu > li.fix-sub > .dropdown{
right: 0;
}
/* MEGAMENU WIDTHS
**********************************************************/
.jetmenu > li > .megamenu.half-width{
width: 50%;
}
.jetmenu > li > .megamenu.full-width{
width: 100%;
left: 0;
}
/* MEGAMENU FORM CONFIGURATION
**********************************************************/
.jetmenu li > .megamenu form{
width: 100%;
}
/* megamenu inputs */
.jetmenu li > .megamenu form input[type="text"],
.jetmenu li > .megamenu form textarea{
padding: 5px;
color: #999;
background: #444;
font-family: 'Open Sans', sans-serif;
font-size: 14px;
border: solid 1px transparent;
outline: none;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
-webkit-transition: border 0.3s linear;
-moz-transition: border 0.3s linear;
-o-transition: border 0.3s linear;
transition: border 0.3s linear;
}
.jetmenu li > .megamenu form input[type="text"]:focus,
.jetmenu li > .megamenu form textarea:focus{
border-color: #e0e0e0;
}
.jetmenu li > .megamenu form input[type="text"]{
width: 100%;
margin-top: 10px;
}
.jetmenu li > .megamenu form textarea{
width: 100%;
margin-top: 10px;
}
.jetmenu li > .megamenu form input[type="submit"]{
width: 25%;
float: right;
height: 30px;
margin-top: 10px;
border: none;
cursor: pointer;
background: #444;
color: #777;
font-family: 'Open Sans', sans-serif;
-webkit-transition: background 0.3s linear;
-moz-transition: background 0.3s linear;
-o-transition: background 0.3s linear;
transition: background 0.3s linear;
}
.jetmenu li > .megamenu form input[type="submit"]:hover{
background: #e0e0e0;
color: #555;
}
/* MEGAMENU GRID SYSTEM
**********************************************************/
.megamenu .row{
width: 100%;
margin-top: 15px;
}
.megamenu .row:first-child {
margin-top: 0;
}
.megamenu .row:before,
.megamenu .row:after {
display: table;
content: "";
line-height: 0;
}
.megamenu .row:after {
clear: both;
}
.megamenu .row .col1,
.megamenu .row .col2,
.megamenu .row .col3,
.megamenu .row .col4,
.megamenu .row .col5,
.megamenu .row .col6{
display: block;
width: 100%;
min-height: 20px;
float: left;
font-size: 1.4em;
<!--margin-left: 2.127659574468085%;-->
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
padding: 10px;
}
.megamenu .row [class*="col"]:first-child {
margin-left: 0;
}
.megamenu .row .col1{
width: 14.893617021276595%;
}
.megamenu .row .col2{
width: 31.914893617021278%;
}
.megamenu .row .col3{
width: 48.93617021276595%;
}
.megamenu .row .col4{
width: 65.95744680851064%;
}
.megamenu .row .col5{
width: 82.97872340425532%;
}
.megamenu .row .col6{
width: 100%;
}
div.col2:hover {
background-color: #02b8fa;
}
div.col1:hover {
color: #888;
background-color: #e7ecf5;/*#7291ca;*/
}
a.q7 {
font-size: 1.4em;
width:100%;
height:100%;
padding: 25px;
}
a.q7:hover {
/*background-color:#02b8fa;*/
}
span.q7 {
font-size: 1.4em;
display:block;
width:100%;
height:100%;
}
span:q7:hover {
/*background-color: #02b8fa;*/
}
/* RIGHT ALIGNMENT (MENU ITEM)
**********************************************************/
.jetmenu > li.right{
float: right;
}
.jetmenu > li.right > .megamenu,
.jetmenu > li.right > .megamenu.half-width,
.jetmenu > li.right > .dropdown{
right: 0;
}
/* to fix right attribute on submenus (menu aligned to right) */
.jetmenu > li.jsright{
float: right;
}
.jetmenu > li.jsright.last > .megamenu,
.jetmenu > li.jsright.last > .megamenu.half-width,
.jetmenu > li.jsright.last > .dropdown{
right: 0;
}
/* ICONS (FONT AWESOME)
**********************************************************/
.jetmenu > li > a > i{
line-height: 23px !important;
margin-right: 6px;
font-size: 18px;
float: left;
}
/* COLLAPSIBLE MENU
**********************************************************/
.jetmenu > li.showhide{
display: none;
width: 100%;
height: 50px;
cursor: pointer;
color: #999;
background: #333;
}
.jetmenu > li.showhide span.title{
margin: 15px 0 0 25px;
font-family: 'Open Sans', sans-serif;
float: left;
}
.jetmenu > li.showhide span.icon{
margin: 17px 20px;
float: right;
}
.jetmenu > li.showhide .icon em{
margin-bottom: 3px;
display: block;
width: 20px;
height: 2px;
background: #999;
}
/* STYLES
**********************************************************/
/* blue */
.blue > li:hover > a, .blue > li.active > a{ background: #2e67b1; color: #fff; }
.blue ul.dropdown li:hover > a{ background: #2e67b1; color: #fff; }
.blue li > .megamenu form input[type="text"]:focus, .blue li > .megamenu form textarea:focus{ border-color: #2e67b1; }
.blue li > .megamenu form input[type="submit"]:hover{ background: #2e67b1; color: #fff; }
.blue li > .megamenu a:hover{ color: #FFF;/*#333333;*//*#02b8fa;*/ }
/* RESPONSIVE LAYOUT
**********************************************************/
@media (max-width: 768px) {
.jetmenu > li{
display: block;
width: 100%;
box-sizing:border-box;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
}
.jetmenu > li > a{
padding: 15px 25px;
}
.jetmenu a{
width: 100%;
background: #333;
box-sizing:border-box;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
}
.jetmenu ul.dropdown,
.jetmenu ul.dropdown li ul.dropdown{
width: 100% !important;
left: 0;
position: static !important;
border: none;
box-sizing:border-box;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
}
.jetmenu ul.dropdown li {
background: #fff !important;
border: none;
}
.jetmenu ul.dropdown > li > a{
padding-left: 40px !important;
}
.jetmenu > li > .megamenu{
width: 100% !important;
position: static;
border-top: none;
}
.jetmenu > li > .megamenu .row [class*="col"]{
float: none;
display: block;
width: 100% !important;
margin-left: 0;
margin-top: 15px;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.jetmenu > li > .megamenu .row:first-child [class*="col"]:first-child {
margin-top: 0;
}
.jetmenu > li > .megamenu .row{
margin-top: 0;
}
.jetmenu > li > ul.dropdown > li > a{ padding-left: 40px !important; }
.jetmenu > li > ul.dropdown > li > ul.dropdown > li > a{ padding-left: 60px !important; }
.jetmenu > li > ul.dropdown > li > ul.dropdown > li > ul.dropdown > li > a{ padding-left: 80px !important; }
}
@media (min-width: 768px) and (max-width: 900px) {
.jetmenu > li > .megamenu{
width: 100% !important;
left: 0 !important;
}
}
body {
font-family: 'Open Sans', sans-serif;
font-size: 16px;
color: #3e343c;
background: #efeeeb, #ffffff, #efeeeb, #ffffff;
font-weight: 400;
padding: 0;
margin: 0;
background: #efeeeb, #ffffff, #efeeeb, #ffffff;
max-width: 100%;
min-width: 320px;
overflow-x: hidden;
}
A.menu {
color: #3b3239;
font-size: 12px;
font-style: normal;
font-weight: 400;
text-decoration: none;
text-transform: uppercase;
padding: 5px;
}
/*A:menu:over:: When a user passes their mouses over them.*/
A.menu:hover {
color: #fbf9f2;
background: #5a2149;
text-decoration: none;
}
/*A:menu-bottom:: Controls the way the Links in the footer display before a user clicks or mouses over on them.*/
A.menu-bottom {
color: #3e343c;
font-size: 16px;
font-style: normal;
font-weight: 400;
text-decoration: none;
text-transform: uppercase;
}
/*A:menu-bottom:over:: When a user passes their mouses over them.*/
A.menu-bottom:hover {
color: #ccc;
text-decoration: none;
}
ul#menu-bottom {
width: 300px;
height: 125px;
float: left;
}
li#menu-bottom {
width: 150px;
line-height: 20px;
list-style: none;
float: left;
}
/*A:: Controls the way the all Links without an associated style display before a user clicks or mouses over them.*/
A {
color: #3e343c;
font-size: 14px;
font-style: normal;
text-decoration: none;
font-weight: 400;
}
/*A:hover:: When a user passes their mouse over them.*/
A:hover {
color: #5a2149;
text-decoration: underline;
}
#mainContent #home {
display: block;
margin: 0 auto;
max-width: 1200px !important;
padding:10px 0 0;
}
.accent-color {
color: #5a2149;
}
.accent-bg-color {
background: #e2e2e2;
color: #000;
}
#mainContainer {
margin: 0 auto;
padding: 0;
position: relative;
width: 100%;
}
#mainContainer .wrapper { max-width:1200px; margin:0 auto;}
nav {
-webkit-box-shadow: 0px 3px 2px #cecece;
-moz-box-shadow: 0px 3px 2px #cecece;
box-shadow: 0px 3px 2px #cecece;
z-index:999;
position:relative;
}
nav ul {
list-style: none;
text-align: center;
/*line-height: 49px;*/
padding: 0;
margin: 0;
}
nav li {
display: inline-block;
*display: inline;
zoom: 1;
}
#mainContent {
float: left;
margin:0 auto;
width:100% !important;
}
ul#desktopMenu {
margin: 0 auto;
max-height: 50px;
max-width: 1200px;
overflow: hidden;
padding: 0 0 15px;
list-style:none;
position:relative;
}
ul#desktopMenu li {
border-right:1px solid #ccc;
position: relative;
}
ul#desktopMenu li:last-child { border-right:none;}
ul#desktopMenu li:hover {
background: #FFF;
}
ul#desktopMenu li a {
display: block;
padding: 0 20px;
}
ul#desktopMenu li a:hover {
color: #fff;
text-decoration: none;
}
ul#desktopMenu li ul {
display: none;
position: fixed;
/*top: 222px;*/
/*border: 1px solid #EEE;*/
background: #ffffff ;
text-align: left;
padding: 10px;
margin-left: -12px;
width: 250px;
z-index: 99999;
-webkit-box-shadow: 0px 2px 2px #666;
-moz-box-shadow: 0px 2px 2px #666;
box-shadow: 0px 2px 2px #666;
}
ul#desktopMenu li:hover ul {
display: block;
}
ul#desktopMenu li ul li {
margin: 0;
padding: 0;
float: left;
display: block;
width: 100%;
border:none !important;
}
ul#desktopMenu li ul li a:hover {
color: #fff;
background: #f15a29;
}
ul#desktopMenu li ul li a {
color: #333;
text-transform: none;
font-weight: normal;
padding: 0 10px;
display: block;
font-size:14px;
}
ul#desktopMenu li ul li:hover {
background: #fcfcfc ;
}
我的JQuery：
/*
NAME: Jet Responsive Megamenu
AUTHOR PAGE: http://codecanyon.net/user/marcoarib
ITEM PAGE: http://codecanyon.net/item/jet-responsive-megamenu/5719593
*/
(function($){
jQuery.fn.jetmenu = function(options){
var settings = {
indicator: true,
speed: 300,
delay: 0,
hideDelay: 0,
hideClickOut: true,
align: "left",
submenuTrigger: "hover",
scrollable: true,
scrollableMaxHeight: 400
}
$.extend( settings, options );
var menu = $(".jetmenu");
$(menu).wrap("<div class='jetmenu-wrapper'></div>");
var menuWrapper = $(".jetmenu-wrapper");
var lastScreenWidth = windowWidth();
var bigScreen = false;
$(menu).prepend("<li class='showhide'><span class='title'>MENU</span><span class='icon'><em></em><em></em><em></em><em></em></span></li>");
if(settings.indicator == true){
$(menu).find("a").each(function(){
if($(this).siblings(".dropdown, .megamenu").length > 0){
$(this).append("<span class='indicator'>+</span>");
}
});
}
screenSize();
$(window).resize(function() {
if(lastScreenWidth <= 768 && windowWidth() > 768){
unbindEvents();
hideCollapse();
bindHover();
if(settings.align == "right" && bigScreen == false){
rightAlignMenu();
bigScreen = true;
}
}
if(lastScreenWidth > 768 && windowWidth() <= 768){
unbindEvents();
showCollapse();
bindClick();
if(bigScreen == true){
rightAlignMenu();
bigScreen = false;
}
}
if(settings.align == "right"){
if(lastScreenWidth > 768 && windowWidth() > 768)
fixSubmenuRight();
}
else{
if(lastScreenWidth > 768 && windowWidth() > 768)
fixSubmenuLeft();
}
lastScreenWidth = windowWidth();
});
function screenSize(){
if(windowWidth() <= 768){
showCollapse();
bindClick();
if(bigScreen == true){
rightAlignMenu();
bigScreen = false;
}
}
else{
hideCollapse();
bindHover();
if(settings.align == "right"){
rightAlignMenu();
bigScreen = true;
}
else{
fixSubmenuLeft();
}
}
}
function bindHover(){
if (navigator.userAgent.match(/Mobi/i) || window.navigator.msMaxTouchPoints > 0 || settings.submenuTrigger == "click"){
$(menu).find("a").on("click touchstart", function(e){
e.stopPropagation();
e.preventDefault();
$(this).parent("li").siblings("li").find(".dropdown, .megamenu").stop(true, true).fadeOut(settings.speed);
if($(this).siblings(".dropdown, .megamenu").css("display") == "none"){
$(this).siblings(".dropdown, .megamenu").stop(true, true).delay(settings.delay).fadeIn(settings.speed);
return false;
}
else{
$(this).siblings(".dropdown, .megamenu").stop(true, true).fadeOut(settings.speed);
$(this).siblings(".dropdown").find(".dropdown").stop(true, true).fadeOut(settings.speed);
}
if($(this).attr("target") == "_blank" || $(this).attr("target") == "blank"){
window.open($(this).attr("href"));
}
else{
window.location.href = $(this).attr("href");
}
});
$(menu).find("li").bind("mouseleave", function(){
$(this).children(".dropdown, .megamenu").stop(true, true).fadeOut(settings.speed);
});
if(settings.hideClickOut == true){
$(document).bind("click.menu touchstart.menu", function(ev){
if($(ev.target).closest(menu).length == 0){
$(menu).find(".dropdown, .megamenu").fadeOut(settings.speed);
}
});
}
}
else{
$(menu).find("li").bind("mouseenter", function() {
$(this).addClass('active');
$(this).children(".dropdown, .megamenu").stop(true, true).delay(settings.delay).fadeIn(settings.speed);
}).bind("mouseleave", function() {
$(this).removeClass('active');
$(this).children(".dropdown, .megamenu").stop(true, true).delay(settings.hideDelay).fadeOut(settings.speed);
});
}
}
function bindClick(){
$(menu).find("li:not(.showhide)").each(function(){
if($(this).children(".dropdown, .megamenu").length > 0){
$(this).children("a").bind("click", function(e){
if($(this).siblings(".dropdown, .megamenu").css("display") == "none"){
$(this).siblings(".dropdown, .megamenu").delay(settings.delay).slideDown(settings.speed).focus();
$(this).parent("li").siblings("li").find(".dropdown, .megamenu").slideUp(settings.speed);
return false;
}
else{
$(this).siblings(".dropdown, .megamenu").slideUp(settings.speed).focus();
firstItemClick = 1;
}
});
}
});
}
function showCollapse(){
$(menu).children("li:not(.showhide)").hide(0);
$(menu).children("li.showhide").show(0);
$(menu).children("li.showhide").bind("click", function(){
if($(menu).children("li").is(":hidden")){
$(menu).children("li").slideDown(settings.speed);
scrollable(true);
}
else{
$(menu).children("li:not(.showhide)").slideUp(settings.speed);
$(menu).children("li.showhide").show(0);
$(menu).find(".dropdown, .megamenu").hide(settings.speed);
scrollable(false);
}
});
}
function hideCollapse(){
$(menu).children("li").show(0);
$(menu).children("li.showhide").hide(0);
scrollable(false);
}
function rightAlignMenu(){
$(menu).children("li").addClass("jsright");
var items = $(menu).children("li");
$(menu).children("li:not(.showhide)").detach();
for(var i = items.length; i >= 1; i--){
$(menu).append(items[i]);
}
fixSubmenuRight();
}
function fixSubmenuRight(){
$(menu).children("li").removeClass("last");
var items = $(menu).children("li");
for(var i = 1; i <= items.length; i++){
if($(items[i]).children(".dropdown, .megamenu").length > 0){
var lastItemsWidth = 0;
for(var y = 1; y <= i; y++){
lastItemsWidth = lastItemsWidth + $(items[y]).outerWidth();
}
if($(items[i]).children(".dropdown, .megamenu").outerWidth() > lastItemsWidth){
$(items[i]).addClass("last");
}
}
}
}
function fixSubmenuLeft(){
$(menu).children("li").removeClass("fix-sub");
var items = $(menu).children("li");
var menuWidth = $(menu).outerWidth();
var itemsWidth = 0;
for(var i = 1; i <= items.length; i++){
if($(items[i]).children(".dropdown, .megamenu").length > 0){
if($(items[i]).position().left + $(items[i]).children(".dropdown, .megamenu").outerWidth() > menuWidth){
$(items[i]).addClass("fix-sub");
}
}
}
}
function unbindEvents(){
$(menu).find("li, a").unbind();
$(document).unbind("click.menu touchstart.menu");
$(menu).find(".dropdown, .megamenu").hide(0);
}
function windowWidth(){
return document.documentElement.clientWidth || document.body.clientWidth || window.innerWidth;
}
function scrollable(flag){
if(settings.scrollable){
if(flag){
$(menuWrapper).css("max-height", settings.scrollableMaxHeight).addClass("scrollable");
}
else{
$(menuWrapper).css("max-height", "auto").removeClass("scrollable");
}
}
}
}
}(jQuery));
jQuery(document).ready(function() {
$().jetmenu({
indicator: false,
speed: 300,
delay: 100,
submenuTrigger: "hover"
});
});
答案 0 :(得分：1)
问题是当你调用jQuery的.show（）时，它会添加一个内联display:block;样式。我们可以通过在函数中添加一个回调来清空显示声明来解决这个问题：
function hideCollapse(){
$(menu).children("li").show(0,function(){
$(menu).children("li").css("display","");
$(menu).children("li.showhide").hide(0);
});
scrollable(false);
}