javascript - Bootstrap 导航栏(左侧菜单)未在顶部正确对齐

Question

我在左侧导航栏定位方面遇到问题。如果您在全屏模式下运行下面的片段并尝试调整浏览器大小，您将看到左侧导航栏未固定在页面顶部。

我的标题( Logo 和下拉菜单)也没有覆盖整个页面。

也许我错过了什么？

任何帮助将不胜感激!

谢谢，谁浪费时间看这个帖子，帮忙做个假人:)

    function htmlbodyHeightUpdate(){
		var height3 = $( window ).height()
		var height1 = $('.nav').height()+50
		height2 = $('.main').height()
		if(height2 > height3){
			$('html').height(Math.max(height1,height3,height2)+10);
			$('body').height(Math.max(height1,height3,height2)+10);
		}
		else
		{
			$('html').height(Math.max(height1,height3,height2));
			$('body').height(Math.max(height1,height3,height2));
		}
		
	}
	$(document).ready(function () {
		htmlbodyHeightUpdate()
		$( window ).resize(function() {
			htmlbodyHeightUpdate()
		});
		$( window ).scroll(function() {
			height2 = $('.main').height()
  			htmlbodyHeightUpdate()
		});
	});

   header.navbar+nav.navbar{
   /* margin-top: 20px;same margin-bottom .navbar */
   }
   .navbar.navbar-default.navbar-fixed-top{
   margin-top: 50px;
   }
   .sidebar.navbar-fixed-top{
    margin-top: 100px;
   }

   @media (min-width: 768px) and (max-width: 998px){
       .navbar.navbar-default.navbar-fixed-top{
       margin-top: 100px;
       }
       .sidebar.navbar-fixed-top{
        margin-top: 150px;
       }
    }

  /* Custom navbar default: global*/

  .navbar.navbar-default{
    background-color: #f8f8f8;
    border-color: #e7e7e7;
    margin: 0;
    border-radius: 0;
  }
  .navbar.navbar-default .navbar-brand {
    color: #666;
    text-shadow: none;
    min-width: 150px;
    }
   .navbar.navbar-default .navbar-nav > li > a {
    color: #666;
    text-shadow: none;
    }
    .navbar.navbar-default .navbar-nav > li > a {
    color: #666;
    text-shadow: none;
    }
    .navbar.navbar-default .navbar-nav > li > a:hover{
    color: #acc47f;
    }
    .navbar.navbar-default .navbar-nav > .active > a{
    color: #fff;
    background-color: #acc47f;
    }
    .navbar.navbar-default .navbar-nav > .active > a:hover{
    color: #608224;
    background-color: #acc47f;
    }
    .navbar.navbar-default .caret {
    border-top-color: #ccc;
    border-bottom-color: #ccc;
    }
    .navbar.navbar-default .caret:hover {
    border-top-color: #333;
    border-bottom-color: #333;
    }


/* Custom sidebar menu */

 /*Remove rounded coners*/

  nav.sidebar.navbar {
    border-radius: 0px;
  }

  nav.sidebar, .main{
    -webkit-transition: margin 200ms ease-out;
      -moz-transition: margin 200ms ease-out;
      -o-transition: margin 200ms ease-out;
      transition: margin 200ms ease-out;
  }

  /* Add gap to nav and right windows.*/
  .main{
    padding: 10px 10px 0 10px;
  }

  /* .....NavBar: Icon only with coloring/layout.....*/

  /*small/medium side display*/
  @media (min-width: 768px) {

    /*Allow main to be next to Nav*/
    .main{
      position: absolute;
      width: calc(100% - 40px); /*keeps 100% minus nav size*/
      margin-left: 40px;
      float: right;
    }

    /*lets nav bar to be showed on mouseover*/
    nav.sidebar:hover + .main{
      margin-left: 200px;
    }

    /*Center Brand*/
    nav.sidebar.navbar.sidebar>.container .navbar-brand, .navbar>.container-fluid .navbar-brand {
      margin-left: 0px;
    }
    /*Center Brand*/
    nav.sidebar .navbar-brand, nav.sidebar .navbar-header{
      text-align: center;
      width: 100%;
      margin-left: 0px;
    }

    /*Center Icons*/
    nav.sidebar a{
      padding-right: 13px;
            min-width: 100px;
    }

    /*custom sidebar nav*/
        nav.sidebar ul.nav.navbar-nav{
            margin: 0;
        }
        nav.sidebar.navbar-inverse .navbar-nav .open .dropdown-menu>li>a {
            color: white;
        }

    /*adds border top to first nav box */
    nav.sidebar .navbar-nav > li:first-child{
      border-top: 1px #e5e5e5 solid;
    }

    /*adds border to bottom nav boxes*/
    nav.sidebar .navbar-nav > li{
      border-bottom: 1px #e5e5e5 solid;
    }
    /*adds background on hover*/
    nav.sidebar .navbar-nav > li:hover{
        color: #fff;
            background-color: #43600E;
    }
    /*removes border last element*/
    nav.sidebar .navbar-nav > li.last{
      border-bottom: none;
    }

    /* Colors/style dropdown box*/
    nav.sidebar .navbar-nav .open .dropdown-menu {
      position: static;
      float: none;
      width: auto;
      margin-top: 0;
      background-color: transparent;
      border: 0;
      -webkit-box-shadow: none;
      box-shadow: none;
    }

    /*allows nav box to use 100% width*/
    nav.sidebar .navbar-collapse, nav.sidebar .container-fluid{
      padding: 0 0px 0 0px;
    }

    /*colors dropdown box text */
    .navbar-inverse .navbar-nav .open .dropdown-menu>li>a {
      color: #777;
    }

/*O quanto o menu irá esconder á esquerda*/
    /*gives sidebar width/height*/
    nav.sidebar{
      width: 200px;
      height: 100%;
      margin-left: -270px;
      float: left;
      z-index: 8000;
      margin-bottom: 0px;
    }

    /*give sidebar 100% width;*/
    nav.sidebar li {
      width: 100%;
    }

    /* Move nav to full on mouse over*/
    nav.sidebar:hover{
      margin-left: 0px;
    }
    /*for hiden things when navbar hidden*/
    .forAnimate{
      opacity: 0;
    }
  }

  /* .....NavBar: Fully showing nav bar..... */

  @media (min-width: 1330px) {

/*     Allow main to be next to Nav
    .main{
      width: calc(100% - 200px); keeps 100% minus nav size
      margin-left: 200px;
    }

    Show all nav
    nav.sidebar{
      margin-left: 0px;
      float: left;
    }
    Show hidden items on nav
    nav.sidebar .forAnimate{
      opacity: 1;
    } */
  }

  nav.sidebar .navbar-nav .open .dropdown-menu>li>a:hover, nav.sidebar .navbar-nav .open .dropdown-menu>li>a:focus {
    color: #CCC;
    background-color: transparent;
  }

  nav:hover .forAnimate{
    opacity: 1;
  }
  
  
  /*---- FIM SLIDE MENU*/
  
  .nav-side-menu {
  overflow: auto;
  font-family: verdana;
  font-size: 12px;
  font-weight: 200;
  background-color: #2e353d;
  position: fixed;
  top: 0px;
  width: 300px;
  height: 100%;
  color: #e1ffff;
}
.nav-side-menu .brand {
  background-color: #23282e;
  line-height: 50px;
  display: block;
  text-align: center;
  font-size: 14px;
}
.nav-side-menu .toggle-btn {
  display: none;
}
.nav-side-menu ul,
.nav-side-menu li {
  list-style: none;
  padding: 0px;
  margin: 0px;
  line-height: 35px;
  cursor: pointer;
  /*    
    .collapsed{
       .arrow:before{
                 font-family: FontAwesome;
                 content: "\f053";
                 display: inline-block;
                 padding-left:10px;
                 padding-right: 10px;
                 vertical-align: middle;
                 float:right;
            }
     }
*/
}
.nav-side-menu ul :not(collapsed) .arrow:before,
.nav-side-menu li :not(collapsed) .arrow:before {
  font-family: FontAwesome;
  content: "\f078";
  display: inline-block;
  padding-left: 10px;
  padding-right: 10px;
  vertical-align: middle;
  float: right;
}
.nav-side-menu ul .active,
.nav-side-menu li .active {
  border-left: 3px solid #d19b3d;
  background-color: #4f5b69;
}
.nav-side-menu ul .sub-menu li.active,
.nav-side-menu li .sub-menu li.active {
  color: #d19b3d;
}
.nav-side-menu ul .sub-menu li.active a,
.nav-side-menu li .sub-menu li.active a {
  color: #d19b3d;
}
.nav-side-menu ul .sub-menu li,
.nav-side-menu li .sub-menu li {
  background-color: #181c20;
  border: none;
  line-height: 28px;
  border-bottom: 1px solid #23282e;
  margin-left: 0px;
}
.nav-side-menu ul .sub-menu li:hover,
.nav-side-menu li .sub-menu li:hover {
  background-color: #020203;
}
.nav-side-menu ul .sub-menu li:before,
.nav-side-menu li .sub-menu li:before {
  font-family: FontAwesome;
  content: "\f105";
  display: inline-block;
  padding-left: 10px;
  padding-right: 10px;
  vertical-align: middle;
}
.nav-side-menu li {
  padding-left: 0px;
  border-left: 3px solid #2e353d;
  border-bottom: 1px solid #23282e;
}
.nav-side-menu li a {
  text-decoration: none;
  color: #e1ffff;
}
.nav-side-menu li a i {
  padding-left: 10px;
  width: 20px;
  padding-right: 20px;
}
.nav-side-menu li:hover {
  border-left: 3px solid #d19b3d;
  background-color: #4f5b69;
  -webkit-transition: all 1s ease;
  -moz-transition: all 1s ease;
  -o-transition: all 1s ease;
  -ms-transition: all 1s ease;
  transition: all 1s ease;
}
@media (max-width: 767px) {
  .nav-side-menu {
    position: relative;
    width: 100%;
    margin-bottom: 10px;
  }
  .nav-side-menu .toggle-btn {
    display: block;
    cursor: pointer;
    position: absolute;
    right: 10px;
    top: 10px;
    z-index: 10 !important;
    padding: 3px;
    background-color: #ffffff;
    color: #000;
    width: 40px;
    text-align: center;
  }
  .brand {
    text-align: left !important;
    font-size: 22px;
    padding-left: 20px;
    line-height: 50px !important;
  }
}
@media (min-width: 767px) {
  .nav-side-menu .menu-list .menu-content {
    display: block;
  }
}
body {
  margin: 0px;
  padding: 0px;
}

nav.navbar-findcond { background: #fff; border-color: #ccc; box-shadow: 0 0 2px 0 #ccc; }
nav.navbar-findcond a { color: #f14444; }
nav.navbar-findcond ul.navbar-nav a { color: #f14444; border-style: solid; border-width: 0 0 2px 0; border-color: #fff; }
nav.navbar-findcond ul.navbar-nav a:hover,
nav.navbar-findcond ul.navbar-nav a:visited,
nav.navbar-findcond ul.navbar-nav a:focus,
nav.navbar-findcond ul.navbar-nav a:active { background: #fff; }
nav.navbar-findcond ul.navbar-nav a:hover { border-color: #f14444; }
nav.navbar-findcond li.divider { background: #ccc; }
nav.navbar-findcond button.navbar-toggle { background: #f14444; border-radius: 2px; }
nav.navbar-findcond button.navbar-toggle:hover { background: #999; }
nav.navbar-findcond button.navbar-toggle > span.icon-bar { background: #fff; }
nav.navbar-findcond ul.dropdown-menu { border: 0; background: #fff; border-radius: 4px; margin: 4px 0; box-shadow: 0 0 4px 0 #ccc; }
nav.navbar-findcond ul.dropdown-menu > li > a { color: #444; }
nav.navbar-findcond ul.dropdown-menu > li > a:hover { background: #f14444; color: #fff; }
nav.navbar-findcond span.badge { background: #f14444; font-weight: normal; font-size: 11px; margin: 0 4px; }
nav.navbar-findcond span.badge.new { background: rgba(255, 0, 0, 0.8); color: #fff; }

<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet"/>
<script src="https://code.jquery.com/jquery-3.1.0.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html><head><title>test</title>
	<link type="text/css" rel="stylesheet" media="all" href="bootstrap.min.css" />
	<link type="text/css" rel="stylesheet" media="all" href="nabs.css" />
	<link type="text/css" rel="stylesheet" media="all" href="font-awesome.min.css" />
    </head>
    <body class="sidebar-mini">
<div class="main">
<aside>
    <nav class="navbar navbar-inverse sidebar navbar-fixed-top" role="navigation">

	<div class="nav-side-menu">
	    <div class="brand">logo</div>
	    <i class="fa fa-bars fa-2x toggle-btn" data-toggle="collapse" data-target="#menu-content"></i>
            <div class="menu-list">

		<ul id="menu-content" class="menu-content collapse out">
		    <li>
			<a href="#">
			    <i class="fa fa-dashboard fa-lg"></i> Dashboard
			</a>
		    </li>
		    <li  data-toggle="collapse" data-target="#1" class="collapsed">
			<a href="#"><i class="fa fa-gift fa-lg"></i> Processing  </a></li>
			<li  data-toggle="collapse" data-target="#4" class="collapsed"><a href="#"><i class="fa fa-gift fa-lg"></i> Payments  </a></li>
			</ul>
		    </div>
	</div>
    </nav>
</aside>
<nav class="navbar navbar-findcond navbar-fixed-top">
    <div class="container">
		<div class="navbar-header">
			<a class="navbar-brand" href="#">Logo</a>
		</div>
		<div class="collapse navbar-collapse" id="navbar">
			<ul class="nav navbar-nav navbar-right">
				<li class="dropdown">
					<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false"><i class="fa fa-fw fa-bell-o"></i> Invites <span class="badge">0</span></a>
					<ul class="dropdown-menu" role="menu">
						<li><a href="#"><i class="fa fa-fw fa-tag"></i> new <span class="badge">Video</span> video</a></li>
						<li><a href="#"><i class="fa fa-fw fa-thumbs-o-up"></i> <span class="badge">Music</span> liked</a></li>
						
					</ul>
				</li>
				<li class="active"><a href="#">Main <span class="sr-only">(current)</span></a></li>
				<li class="dropdown">
					<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Admin <span class="caret"></span></a>
					<ul class="dropdown-menu" role="menu">
						<li><a href="#">test1</a></li>
						<li class="divider"></li>
						<li><a href="#">test2</a></li>
					</ul>
				</li>
			</ul>
		</div>
	</div>
</nav>








<section class="content-header">
    <h1>
	<small>hi</small>
    </h1>
    <ol class="breadcrumb">
	<li><a href="#"><i class="fa fa-dashboard"></i> Home</a></li>
	<li class="active">Dashboard</li>
    </ol>
</section><section class="content">
    <div class="row">

        <div class="col-md-12">
	hi there</div></div>
</section>
<table border="0" style="border: 1px; border-style: dotted;" cellspacing="0" cellpadding="0" width="100%">
    <tr bgcolor="#D5E7F7">
	<td width="100%">

	</td>
    </tr>
</table>
</div>

Answer 1

黑色导航栏有一个侧边栏类似乎破坏了导航栏的功能。

PS:解决这个问题会导致黑色导航栏固定在屏幕顶部并被白色导航栏覆盖，如果你想让黑色导航栏有先例，你需要提高它的 z-index。