css 响应式(媒介查询)

1.CSS 来实现响应式

CSS实现响应式网站的布局要用到的就是CSS中的媒体查询接下来来简单介绍一下:

  • @media 类型 and (条件1) and (条件二){css样式}
  • <link rel="stylesheet" type="text/css" href="css/demo.css" media=“all and (max-width=980px)”/>

我们只需用到width衍生出的max-width这个属性,定义输出设备中的页面可见区域宽度来控制该改变的样式即可。
html代码如下:

<!doctype html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>响应式</title>

    <link rel="stylesheet" type="text/css" href="demo01.css" media="screen and (min-width:1024px)"/>
    <link rel="stylesheet" type="text/css" href="demo03.css" media="screen and (max-width:1024px) and (min-width:450px)"/>
    <link rel="stylesheet" type="text/css" href="demo02.css" media="screen and (max-width:450px)"/>
</head>
<body>
    <div class="header">
        头部
    </div>
    <div class="container clearfix">
        <div class="left">左部</div>
        <div class="center">中部</div>
        <div class="right">右部</div>
    </div>
    <div class="footer">底部</div>
</body>
</html>

demo01.css样式如下:

body{
    margin:0;
    text-align:center;
}

.header{
    height:100px;
    background-color:red;
}
.container{
    height:400px;
    background-color:pink;
}
.clearfix:after{
    display:block;
    content:"";
    visibility:hidden;
    height:0;
    clear:both;
}
.footer{
    height:100px;
    background-color:blue;
}
.left{
    width:20%;
    background-color:orange;
    float:left;
    height:300px;
}
.center{
    width:55%;
    background-color:gray;
    float:left;
    height:300px;
    margin:0 2.5%;
}
.right{
    width:20%;
    background-color:yellow;
    float:left;
    height:300px;
}

demo02的样式如下:

body{
    margin:0;
    text-align:center;
}

.header{
    height:100px;
    background-color:red;
}
.container{
    height:400px;
    background-color:pink;
}
.clearfix:after{
    display:block;
    content:"";
    visibility:hidden;
    height:0;
    clear:both;
}
.footer{
    height:100px;
    background-color:blue;
}
.left{
    width:30%;
    background-color:orange;
    float:left;
    height:300px;
}
.center{
    width:70%;
    background-color:gray;
    float:left;
    height:300px;
}
.right{
    width:100%;
    background-color:yellow;
    height:300px;
}

demo03的样式:

body{
    margin:0;
    text-align:center;
}

.header{
    height:100px;
    background-color:red;
}
.container{
    background-color:pink;
}
.clearfix:after{
    display:block;
    content:"";
    visibility:hidden;
    height:0;
    clear:both;
}
.footer{
    height:100px;
    background-color:blue;
}
.left{
    width:100%;
    background-color:orange;
    height:300px;
}
.center{
    width:100%;
    background-color:gray;
    height:300px;
}
.right{
    width:100%;
    background-color:yellow;
    height:300px;
}

效果图:
图片描述

窗口大于1024px时显示的样子
图片描述

当大于640小于980时,右侧栏在底部
图片描述

当小于480时,导航栏折叠,body三部分竖直排列显示,若窗口持续缩小,不在发生变化,区域被压缩

效果总图:
图片描述

持续更新,欢迎大家!

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转载自www.cnblogs.com/jlfw/p/11877644.html