bootstrap-03 常用重要组件，2

一,轮播图
轮播图完整代码：
<!-- 轮播图最外层的大盒子  在这里传入参数 -->
<div  class="carousel slide" data-ride="carousel">
  <!-- Indicators -->
  <ol class="carousel-indicators">
    <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
    <li data-target="#carousel-example-generic" data-slide-to="1"></li>
    <li data-target="#carousel-example-generic" data-slide-to="2"></li>
  </ol>

  <!-- 轮播图的图片部分->
  <div class="carousel-inner" role="listbox">
    <div class="item active">
      <img src="..." alt="...">
      <!-- 该图片的标题->
      <div class="carousel-caption">
       该图片的标题内容
      </div>
    </div>
    <div class="item">
      <img src="..." alt="...">
      <!-- 该图片的标题->
      <div class="carousel-caption">
        该图片的标题内容
      </div>
    </div>
    ...
  </div>

  <!-- 轮播图的左右控制按钮 -->
  <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
    <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
    <span class="sr-only">左文字提示(可有可无)</span>
  </a>
  <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
    <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
    <span class="sr-only">右文字提示(可有可无)</span>
  </a>
</div>


1, 最外层大盒子的其中一个类名,用来定位左右箭头和底部的角标
.carousel {
    position: relative;
}

用来定位底部角标的位置
.carousel-indicators {
position: absolute;
bottom: 10px;
left: 50%;
z-index: 15;
width: 60%;
padding-left: 0;
margin-left: -30%;
text-align: center;
list-style: none;
}

@media screen and (min-width: 768px)
.carousel-indicators {
bottom: 20px;
}

把active类名添加给与显示图片绑定的角标
.carousel-indicators .active {
width: 12px;
height: 12px;
margin: 0;
background-color: #fff;
}
外层包所有图片的盒子
.carousel-inner {
position: relative;
width: 100%;
overflow: hidden;
}
添加给包图片的盒子
.carousel-inner>.item {
position: relative;
display: none;
-webkit-transition: .6s ease-in-outleft;
-o-transition: .6s ease-in-out left;
transition: .6s ease-in-out left;
}
给显示的图片添加active类名
@media not all, (-webkit-transform-3d)
bootstrap.css:6282
.carousel-inner>.item.active, .carousel-inner>.item.next.left, .carousel-inner>.item.prev.right {
left: 0;
-webkit-transform: translate3d(0,0,0);
transform: translate3d(0,0,0);
}
遮罩层
.carousel-control {
position: absolute;
top: 0;
bottom: 0;
left: 0;
width: 15%;
font-size: 20px;
color: #fff;
text-align: center;
text-shadow: 0 1px 2px rgba(0,0,0,.6);
background-color: rgba(0,0,0,0);
filter: alpha(opacity=50);
opacity: .5;
}
箭头
.glyphicon {
position: relative;
top: 1px;
display: inline-block;
font-family: \'Glyphicons Halflings\';
font-style: normal;
font-weight: 400;
line-height: 1;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
glyphicon-chevron-left：设置左箭头的位置
glyphicon-chevron-right：设置右箭头的位置

固定在顶部
<nav class="navbar navbar-default navbar-fixed-top">
  <div class="container">
    ...
  </div>
</nav>

首先添加插件：
<link rel="stylesheet" href="./bootstrap-3.3.7 (1)/bootstrap-3.3.7/dist/css/bootstrap.min.css">


.navbar-fixed-top：给要固定的盒子添加这个类名

给要固定的盒子添加背景颜色
.navbar-default {
background-color: #f8f8f8;
border-color: #e7e7e7;
}

给导航栏添加基本的样式
.navbar {
position: relative;
min-height: 50px;
margin-bottom: 20px;
border: 1px solid transparent;
}

让盒子居中
.container {
padding-right: 15px;
padding-left: 15px;
margin-right: auto;
margin-left: auto;
}