bootstrap中的導(dǎo)航條實例代碼詳解

一、和導(dǎo)航的區(qū)別

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1.導(dǎo)航條比導(dǎo)航多了一個條字

2.直接上圖

導(dǎo)航：

bootstrap中的導(dǎo)航條實例代碼詳解

導(dǎo)航條：

bootstrap中的導(dǎo)航條實例代碼詳解

簡單文字描述：由兩張圖看出，導(dǎo)航內(nèi)容比較簡單，而導(dǎo)航條可以包含導(dǎo)航及其他元素，如表單，搜索框等，并且通常導(dǎo)航條會有一個區(qū)別于頁面的背景色。

二、在頁面中定義導(dǎo)航條

方法：

為父容器添加類名navbar navbar-default。navbar-default類用來規(guī)定導(dǎo)航條的顏色，可以更改為navbar-inverse來讓導(dǎo)航條反色顯示。bootstrap官網(wǎng)建議使用nav元素。但也常用div元素，建議用div元素時增加role="navigation"屬性，該屬性對一些特殊的輔助設(shè)備友好。

結(jié)構(gòu)：

標題或者logo放在類名為.navbar-header>.navbar-brand的容器中，其他條目可以放在類名為.nav navbar-nav的容器中

<div class="navbar navbar-default" role="navigation">
 　<div class="navbar-header">
 　 <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="navbar-brand">MY WEBSITE</a>
 　</div>
 <ul class="nav navbar-nav">
  <li class="active"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首頁</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目一</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目二</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目三</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目四</a></li>
 </ul>
</div>

包含元素：

1.表單：form 添加類名navbar-form
2.按鈕：添加類名navbar-btn（需和類名為“navbar-nav”或"navbar-brand"的元素配合使用，且數(shù)量不能多）
3.文本：添加類名navbar-text（需和類名為“navbar-nav”或"navbar-brand"的元素配合使用，且數(shù)量不能多）
4.鏈接：添加類名navbar-link（需和類名為“navbar-nav”或"navbar-brand"的元素配合使用，且數(shù)量不能多）
5.二級菜單：（見下面代碼）

<div class="navbar navbar-default" role="navigation">
 　<div class="navbar-header">
 　 <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="navbar-brand">MY WEBSITE</a>
 　</div>
 <ul class="nav navbar-nav">
  <li class="active"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首頁</a></li>
  <li class="dropdown">
   <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" data-toggle="dropdown" class="dropdown-toggle">水果<span class="caret"></span></a>
   <ul class="dropdown-menu">
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >蘋果</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >橘子</a></li>
   <li ><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >香蕉</a></li>
   </ul>
  </li>
  <li><a href="##" rel="external nofollow" rel="external nofollow" rel="external nofollow" >蔬菜</a></li>
  <li><a href="##" rel="external nofollow" rel="external nofollow" rel="external nofollow" >哈哈</a></li>
  <li><a href="##" rel="external nofollow" rel="external nofollow" rel="external nofollow" >呵呵</a></li>
 </ul>
</div>

位置樣式：

•導(dǎo)航條內(nèi)元素左浮動：左浮動的元素添加類名navbar-left
•導(dǎo)航條內(nèi)元素右浮動：右浮動的元素添加類名navbar-right
•導(dǎo)航條固定在瀏覽器窗口頂部：導(dǎo)航條父容器添加類名navbar-fixed-top
•導(dǎo)航條固定在瀏覽器窗口底部：導(dǎo)航條父容器添加類名navbar-fixed-bottom

注意：讓導(dǎo)航條固定在瀏覽器窗口頂部或底部會遮蓋到頁面頂部或底部的內(nèi)容，解決辦法為：給body設(shè)置合適的內(nèi)邊距（溫馨提示：導(dǎo)航條默認高度為50px）。

三、響應(yīng)式

目的：讓導(dǎo)航條內(nèi)容比較多的時候，在窄屏幕設(shè)備上顯示更加友好

表現(xiàn)：寬屏正常顯示，窄屏?xí)r隱藏一部分條目，并調(diào)整其排列方式為垂直排列，然后通過一個按鈕單擊顯示

寬屏顯示：

bootstrap中的導(dǎo)航條實例代碼詳解

窄屏顯示：

bootstrap中的導(dǎo)航條實例代碼詳解

窄屏展開：

bootstrap中的導(dǎo)航條實例代碼詳解

方法：

1.將想要被折疊的元素包裹在一個類名為"collapse navbar-collapse"的div中

2.定義想要顯示的圖標，可以將其放在類名為“navbar-header”的元素中

<button class="navbar-toggle" type="button" data-toggle="collapse">
 <span class="sr-only">Toggle Navigation</span>
 <span class="icon-bar"></span>
 <span class="icon-bar"></span>
 <span class="icon-bar"></span>
</button>

完整代碼：

<div class="navbar navbar-default" role="navigation">
 <div class="navbar-header">
  <button class="navbar-toggle" type="button" data-toggle="collapse" data-target=".test">
   <span class="sr-only">Toggle Navigation</span>
   <span class="icon-bar"></span>
   <span class="icon-bar"></span>
   <span class="icon-bar"></span>
  </button>
  <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="navbar-brand">LOGO</a>
 </div>
 <div class="collapse navbar-collapse test">
  <ul class="nav navbar-nav">
   <li class="active"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首頁</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目一</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目二</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目三</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目四</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >條目五</a></li>
  </ul>
 </div>
</div>

1.為隱藏元素的父標簽添加一個class類名或id名，然后讓button的data-target鏈接到該元素：data-target=".class/#id"

響應(yīng)式的臨界點為768px,即當(dāng)屏幕大于768px時原樣顯示，小于768px時改變樣式

路徑導(dǎo)航（面包屑導(dǎo)航）

<ol class="breadcrumb">
 <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Home</a></li>
 <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Library</a></li>
 <li class="active">Data</li>
</ol>

樣式：

bootstrap中的導(dǎo)航條實例代碼詳解

總結(jié)

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