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創(chuàng)新互聯(lián)Bootstrap教程：Bootstrap導(dǎo)航欄

Bootstrap 導(dǎo)航欄

導(dǎo)航欄是一個很好的功能，是 Bootstrap 網(wǎng)站的一個突出特點。導(dǎo)航欄在您的應(yīng)用或網(wǎng)站中作為導(dǎo)航頁頭的響應(yīng)式基礎(chǔ)組件。導(dǎo)航欄在移動設(shè)備的視圖中是折疊的，隨著可用視口寬度的增加，導(dǎo)航欄也會水平展開。在 Bootstrap 導(dǎo)航欄的核心中，導(dǎo)航欄包括了站點名稱和基本的導(dǎo)航定義樣式。

默認的導(dǎo)航欄

創(chuàng)建一個默認的導(dǎo)航欄的步驟如下：

下面的實例演示了這點：

實例

<
nav

class
=
"
navbar navbar-default
"

role
=
"
navigation
"
>

<
div

class
=
"
container-fluid
"
>

<
div

class
=
"
navbar-header
"
>

<
a

class
=
"
navbar-brand
"

href
=
"
#
"
>
菜鳥教程
a
>

div
>

<
div
>

<
ul

class
=
"
nav navbar-nav
"
>

<
li

class
=
"
active
"
>
<
a

href
=
"
#
"
>
iOS
a
>
li
>

<
li
>
<
a

href
=
"
#
"
>
SVN
a
>
li
>

<
li

class
=
"
dropdown
"
>

<
a

href
=
"
#
"

class
=
"
dropdown-toggle
"

data-toggle
=
"
dropdown
"
>
Java
<
b

class
=
"
caret
"
>
b
>

a
>

<
ul

class
=
"
dropdown-menu
"
>

<
li
>
<
a

href
=
"
#
"
>
jmeter
a
>
li
>

<
li
>
<
a

href
=
"
#
"
>
EJB
a
>
li
>

<
li
>
<
a

href
=
"
#
"
>
Jasper Report
a
>
li
>

<
li

class
=
"
divider
"
>
li
>

<
li
>
<
a

href
=
"
#
"
>
分離的鏈接
a
>
li
>

<
li

class
=
"
divider
"
>
li
>

<
li
>
<
a

href
=
"
#
"
>
另一個分離的鏈接
a
>
li
>

ul
>

li
>

ul
>

div
>

div
>

nav
>

嘗試一下 ?

結(jié)果如下所示：

響應(yīng)式的導(dǎo)航欄

為了給導(dǎo)航欄添加響應(yīng)式特性，您要折疊的內(nèi)容必須包裹在帶有 class .collapse、.navbar-collapse 的

中。折疊起來的導(dǎo)航欄實際上是一個帶有 class .navbar-toggle 及兩個 data- 元素的按鈕。第一個是 data-toggle，用于告訴 JavaScript 需要對按鈕做什么，第二個是 data-target，指示要切換到哪一個元素。三個帶有 class .icon-bar 的 創(chuàng)建所謂的漢堡按鈕。這些會切換為 .nav-collapse
中的元素。為了實現(xiàn)以上這些功能，您必須包含 Bootstrap 折疊（Collapse）插件。

下面的實例演示了這點：

實例

<
nav

class
=
"
navbar navbar-default
"

role
=
"
navigation
"
>

<
div

class
=
"
container-fluid
"
>

<
div

class
=
"
navbar-header
"
>

<
button

type
=
"
button
"

class
=
"
navbar-toggle
"

data-toggle
=
"
collapse
"

data-target
=
"
#example-navbar-collapse
"
>

<
span

class
=
"
sr-only
"
>
切換導(dǎo)航
span
>

<
span

class
=
"
icon-bar
"
>
span
>

<
span

class
=
"
icon-bar
"
>
span
>

<
span

class
=
"
icon-bar
"
>
span
>

button
>

<
a

class
=
"
navbar-brand
"

href
=
"
#
"
>
菜鳥教程
a
>

div
>

<
div

class
=
"
collapse navbar-collapse
"

id
=
"
example-navbar-collapse
"
>

<
ul

class
=
"
nav navbar-nav
"
>

<
li

class
=
"
active
"
>
<
a

href
=
"
#
"
>
iOS
a
>
li
>

<
li
>
<
a

href
=
"
#
"
>
SVN
a
>
li
>

<
li

class
=
"
dropdown
"
>

<
a

href
=
"
#
"

class
=
"
dropdown-toggle
"

data-toggle
=
"
dropdown
"
>
Java
<
b

class
=
"
caret
"
>
b
>

a
>

<
ul

class
=
"
dropdown-menu
"
>

<
li
>
<
a

href
=
"
#
"
>
jmeter
a
>
li
>

<
li
>
<
a

href
=
"
#
"
>
EJB
a
>
li
>

<
li
>
<
a

href
=
"
#
"
>
Jasper Report
a
>
li
>

<
li

class
=
"
divider
"
>
li
>

<
li
>
<
a

href
=
"
#
"
>
分離的鏈接
a
>
li
>

<
li

class
=
"
divider
"
>
li
>

<
li
>
<
a

href
=
"
#
"
>
另一個分離的鏈接
a
>
li
>

ul
>

li
>

ul
>

div
>

div
>

nav
>

嘗試一下 ?

結(jié)果如下所示：

導(dǎo)航欄中的表單

導(dǎo)航欄中的表單不是使用 Bootstrap 表單 章節(jié)中所講到的默認的 class，它是使用 .navbar-form class。這確保了表單適當(dāng)?shù)拇怪睂R和在較窄的視口中折疊的行為。使用對齊方式選項（這將在組件對齊方式部分進行詳細講解）來決定導(dǎo)航欄中的內(nèi)容放置在哪里。

下面的實例演示了這點：

實例

<
nav

class
=
"
navbar navbar-default
"

role
=
"
navigation
"
>

<
div

class
=
"
container-fluid
"
>

<
div

class
=
"
navbar-header
"
>

<
a

class
=
"
navbar-brand
"

href
=
"
#
"
>
菜鳥教程
a
>

div
>

<
form

class
=
"
navbar-form navbar-left
"

role
=
"
search
"
>

<
div

class
=
"
form-group
"
>

<
input

type
=
"
text
"

class
=
"
form-control
"

placeholder
=
"
Search
"
>

div
>

<
button

type
=
"
submit
"

class
=
"
btn btn-default
"
>
提交
button
>

form
>

div
>

nav
>

嘗試一下 ?

結(jié)果如下所示：

導(dǎo)航欄中的按鈕

您可以使用 class .navbar-btn 向不在

中的