导航条

一、基本信息

关键词:navbar

写法:

1、给导航加class="navbar"

2、给导航加默认样式class="navbar-default"

3、菜单: 给菜单的<ul>加class="nav navbar-nav"

4、选中状态:给选中的菜单项的<li>加class="active"

5、容器位置:最好写在<nav>里面

(1)固定

<nav class="navbar navbar-default">
    <div class="container">
        <ul class="nav navbar-nav">
            <li class="active"><a href="#">one</a></li>
            <li><a href="#">two</a></li>
            <li><a href="#">three</a></li>
        </ul>
    </div>
</nav>

(2)自适应

<nav class="navbar navbar-default">
    <div class="container-fluid">
        <ul class="nav navbar-nav">
            <li class="active"><a href="#">one</a></li>
            <li><a href="#">two</a></li>
            <li><a href="#">three</a></li>
        </ul>
    </div>
</nav>

6、导航的logo

<div class="navbar-header">
      <a href="#" class="navbar-brand">logo</a>
</div>

 

二、其他效果

1、黑色色调

写法:给导航加class="navbar-inverse"

<nav class="navbar navbar-inverse">
    <div class="container-fluid">
        <ul class="nav navbar-nav">
            <li class="active"><a href="#">one</a></li>
            <li><a href="#">two</a></li>
            <li><a href="#">three</a></li>
        </ul>
    </div>
</nav>

2、导航变为直角

写法:class="navbar-static-top"

<nav class="navbar navbar-inverse navbar-static-top">
    <div class="container-fluid">
        <ul class="nav navbar-nav">
            <li class="active"><a href="#">one</a></li>
            <li><a href="#">two</a></li>
            <li><a href="#">three</a></li>
        </ul>
    </div>
</nav>

3、固定的导航条

写法:

(1)固定在头部给导航加class="navbar-fixed-top"

(2)固定在底部给导航加class="navbar-fixed-bottom"

解决导航遮盖的问题:给body加一个top值,body{ margin-top:50px;}

<nav class="navbar navbar-inverse navbar-fixed-top">
    <div class="container-fluid">
        <ul class="nav navbar-nav">
            <li class="active"><a href="#">one</a></li>
            <li><a href="#">two</a></li>
            <li><a href="#">three</a></li>
        </ul>
    </div>
</nav>

4、带下拉菜单的导航

写法:

(1)给需要加下拉菜单的选项加箭头:导航选项<li>的<a>的文字后面加<span class="caret"></span>

(2)下拉菜单:有下拉菜单的<li>加class="dropdown"

(3)有下拉菜单的导航有点击交互: 导航选项<li>的<a>加class="dropdown-toggle" data-toggle="dropdown"

(4)下拉菜单的<ul>加 class="dropdown-menu"

<nav class="navbar navbar-inverse navbar-fixed-top">
    <div class="container">
        <div class="navbar-header">
            <a href="#" class="navbar-brand">logo</a>
        </div>
        <ul class="nav navbar-nav">
            <li class="active"><a href="#">one</a></li>
            <li><a href="#">two</a></li>
            <li class="dropdown">
                <a href="#" class="dropdown-toggle" data-toggle="dropdown">three <span class="caret"></span></a>
                <ul class="dropdown-menu">
                    <li><a href="#">child1</a></li>
                    <li><a href="#">child2</a></li>
                </ul>
            </li>
        </ul>
    </div>
</nav>

5、响应式

写法:

(1)在头部logo的区域里加按钮,因为按钮和logo一样显示不隐藏,按钮加class="navbar-toggle"

<div class="navbar-header">
    <button class="navbar-toggle">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
    </button>
    <a href="#" class="navbar-brand">logo</a>
</div>

(2)给下拉菜单加一个父级,给父级加 class="collapse navbar-collapse",让菜单在手机端不显示

(3)给按钮加交互:按钮加data-toggle="collapse" data-target="#自己起的id名",下拉菜单的id为data-target的值

<nav class="navbar navbar-inverse navbar-fixed-top">
    <div class="container">
        <div class="navbar-header">
            <button class="navbar-toggle" data-toggle="collapse" data-target="#myCollapse">
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
            <a href="#" class="navbar-brand">logo</a>
        </div>
        <div id="myCollapse" class="collapse navbar-collapse">
            <ul class="nav navbar-nav">
                <li class="active"><a href="#">one</a></li>
                <li><a href="#">two</a></li>
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">three <span class="caret"></span></a>
                    <ul class="dropdown-menu">
                        <li><a href="#">child1</a></li>
                        <li><a href="#">child2</a></li>
                    </ul>
                </li>
            </ul>
        </div>
    </div>
</nav>

6、滚动监听

描述:点击导航按钮滑动到页面的指定位置,当滑动的页面的时候,导航的按钮也发生响应的变化

写法:

(1)给需要监听的元素加滚动监听data-spy="scroll" ,且需要加上position:relative;,一般为body元素

(2)给需要监听的导航加id,给需要监听的元素加 data-target="#自己写的id名" 

(3)给指定的区域加上不同的id,利用锚点的方式

(4)距离顶端某像素的时候触发事件:data-offset="像素值"(距离顶部某像素之后就变导航项2了,不必非要到达顶部才变化,之后的选项同理)

(5)锚点的时候如果导航条挡住部分内容,可以去掉监听元素(body)的margin-top:50px,可以给跳转的内容加padding-top:50px;

body{ position:relative;}
.pos{ margin-bottom:500px; padding-top:50px;}
<body style="height:2000px;" data-spy="scroll" data-target="#myNavbar" data-offset
="200">
<nav id="myNavbar" class="navbar navbar-inverse navbar-fixed-top">
    <div class="container">
        <div class="navbar-header">
            <a href="#" class="navbar-brand">logo</a>
        </div>
        <div id="myCollapse" class="collapse navbar-collapse">
            <ul class="nav navbar-nav">
                <li class="active"><a href="#a">one</a></li>
                <li><a href="#b">two</a></li>
                <li><a href="#c">three</a></li>
            </ul>
        </div>
    </div>
</nav>
<div id="a" class="pos">aaaaaaaaaaa</div>
<div id="b" class="pos">bbbbbbbbbbb</div>
<div id="c" class="pos">ccccccccccc</div>
</body>

 

posted @ 2017-08-28 17:04  念念念不忘  阅读(353)  评论(0编辑  收藏  举报