CSS学习（九）-CSS背景

一、理论：

1.background-break

a.bounding-box 背景图像在整个内联元素中进行平铺

b.each-box 背景图像在行内中进行平铺

c.continuous 下一行的背景图像紧接着上一行中的图像继续平铺

以上仅在firefox下可用

2.css多背景

a.background-image 设置元素背景图片民，可用相对地址或绝对地址索引背景图像

b.background-repeat 设置元素背景图像的平铺方式默认repeat

c.background-size 设置元素背景图像的尺寸大小默认auto

d.background-attachment 设置元素的背景图片是否固定默认scroll

e.background-clip 控制元素背景图像显示区域大小,默认border-box

f.background-color 设置元素背景颜色

g.多个属性中间必须用","分开

h.最先声明的背景图片将会居于最上层，最后指定的图片放于最底层

二、实践：

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <style type="text/css">

        body{

            background: #000 url(images/2-11-test.jpg) center center fixed no-repeat;

            -moz-background-size: cover;

            -webkit-background-size: cover;

            -o-background-size: cover;

            background-size: cover;

        }

        @media only all and (max-width:1024px) and (max-height: 768px){

            body{

                -moz-background-size: 1024px 768px;

                -webkit-background-size: 1024px 768px;

                -o-background-size: 1024px 768px;

                background-size: 1024px 768px;

            }

        }

        @media only all and (max-width:640px) and (max-height: 480px){

            body{

                -moz-background-size: 640px 480px;

                -webkit-background-size: 640px 480px;

                -o-background-size: 640px 480px;

                background-size: 640px 480px;

            }

        }

    </style>

</head>

<body>

    <div></div>

    <div class="div1" ></div>

    <div class="div2" ></div>

    <div class="div3" ></div>

    <div class="div4" ></div>

</body>

</html>

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <style type="text/css">

        .demo{

            width: 500px;

            height: 300px;

            border:20px solid rgba(104,105,168,0.5);

            border-radius: 10px;

            padding: 80px 60px;

            color:#123589;

            font-size: 25px;

            line-height: 1.5;

            text-align: center;

        }

        .multipleBg{

            background: url("images/round-box1.jpg") no-repeat left top,

            url("images/round-box-2.jpg") no-repeat right top,

            url("images/border-radius.jpg") no-repeat left bottom,

            url("images/tabs-image.jpg") no-repeat right bottom,

            url("images/border.jpg") no-repeat right bottom;

            -webkit-background-origin: border-box,border-box,border-box,border-box,padding-box;

            -moz-background-origin: border-box,border-box,border-box,border-box,padding-box;

            -o-background-origin: border-box,border-box,border-box,border-box,padding-box;

            background-origin: border-box,border-box,border-box,border-box,padding-box;

            -moz-background-clip: border-box;

            -webkit-background-clip: border-box;

            -o-background-clip:border-box;

            background-clip: border-box;

        }

    </style>

</head>

<body>

    <div class="demo multipleBg">用五张背景图片做出这种效果</div>

</body>

</html>

巴特西

CSS学习（九）-CSS背景

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