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Chapter8 背景控制与字体图标
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一、背景控制的常用属性

1、背景控制的常用属性表

语法 描述
background-color 设置背景颜色
background-image 设置背景图片
background-repeat 设置背景平铺方向
background-position 设置背景图像的位置
background-size 拉伸背景图片
background-clip 设置背景覆盖范围
background: linear-gradient() 设置背景角度、颜色渐变
box-shadow 设置背景阴影外发光效果
border-radius 设置背景框四个角的弧度

2、背景案例：

3、源码：

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <title>背景</title>
  8.     <style>
  9.         .box{
  10.             width: 200px;
  11.             height: 200px;
  12.             /* border:1px solid #000; */
  13.             /* 边角度数 */
  14.             border-radius: 100px;
  15.             border-radius: 50px;
  18.             /* 背景色 */
  19.             background-color: lightgreen;
  20.              /* 内边距是透明的，只能设置宽度，不能设置样式，故背景色默认可以从内边距透出来 */
  21.             /* padding:20px; */
  22.              /* 控制背景的覆盖范围，限制在内容区，背景裁切 */   
  24.             background-clip: border-box;
  25.             background-clip: content-box;
  27.             /* 渐变 */        
  28.             /* 从上到下渐变 */
  29.             background:linear-gradient(coral,yellow);
  30.             /* 控制角度 */
  31.             /* 45度， */
  32.             background:linear-gradient(45deg,blue,yellow);
  33.             background:linear-gradient(to right,blue,yellow);
  34.             background:linear-gradient(to right,blue,red,orange,pink,yellow);
  35.             background:linear-gradient(
  36.             to right,
  37.             rgba(255,0,0,0.7),
  38.             blue,
  39.             red,
  40.             orange,
  41.             pink,
  42.             yellow);
  43.             /* background-clip: content-box; */
  44.             /* 背景图片 */
  45.             background-image:url('girl.png') ;
  46.             background-repeat:no-repeat;
  47.             /* background-repeat:repeat-x;
  48.             background-repeat:repeat-y;
  49.             background-attachment: fixed; */
  50.             /* 背景定位：位置; */
  51.              /* background-position:50px 60px ; */
  52.             /* background-position:right center ;  */
  53.             /* 上下两行相等 */
  54.             /* background-position: center right;  */
  55.             /* 只写一个，第二个默认是center */
  56.             /* background-position: left ;  */
  58.             /* background-position: 50% 20% ;  */
  59.             /* 只写一个，第二个默认是50% */ 
  60.             /* background-position: 50% ;  */
  61.             /* background-size :contain; 
  62.             background-size :cover; */
  63.             /* 简写 */
  64.             background:violet;
  65.             background:violet url("girl.png") no-repeat center;
  66.             position: relative;
  67.             top:20px;
  68.             left:30px ;
  69.             /* box-shadow: 5px-水平偏移， 8px-垂直偏移， 10px-扩散度， black; */
  70.             box-shadow: 15px 8px 10px blue;
  71.         }
  72.         /* 鼠标悬停样式hover{} */
  73.         /* 鼠标移到后变成手形：cursor:pointer; */
  74.             .box:hover{
  75.                /* 外发光 */
  76.               box-shadow: 0 0 40px red;
  77.               cursor:pointer;
  78.             }
  79.      </style>
  80. </head>
  81. <body>
  82.     <div class="box">
  83.     </div>
  84. </body>
  85. </html>

二、精灵图的原理与实现

1、精灵图


2、源码

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <title>背景实战：精灵图/雪碧图</title>
  7.     <style>
  8.         .box1{
  9.             width:600px;
  10.             height: 600px;
  11.             /* padding-left:0 ; */
  12.             border: 1px solid red;
  13.             background-image: url("01.png");
  14.             background-repeat: no-repeat;
  15.             background-position: 20px 30px ;
  16.             background-color:lightgreen ;
  17.         }
  18.         .box2{
  19.             width: 90px;
  20.             height: 90px;
  21.             background-image: url("01.png") ;
  22.             background-position: -180px -90px;
  24.         }
  25.         .box3{
  26.            width: 90px;
  27.            height: 90px;
  28.            background-image: url("01.png") ;
  29.            background-position: -0px -180px;
  30.         }
  31.         .box4{
  32.             width: 90px;
  33.             height: 90px;
  34.             background-image: url("01.png") ;
  35.             background-position: -270px -360px;
  36.         }
  38.     </style>
  39. </head>
  40. <body>
  41.     <div class="box1"></div>
  42.     <div class="box2"></div>
  43.     <div class="box3"></div>
  44.     <div class="box4"></div>
  45. </body>
  46. </html>

三、阿里图标的引用

1、图例

2、源码

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <!-- 引入字体图标的类样式 -->
  7.     <link rel="stylesheet" href="font2/iconfont.css"/>
  8.     <title>阿里字体图标的使用方法1</title>
  9.     <style>
  10.         .lf{
  11.             font-size: 40px;
  12.             color:magenta;
  13.             box-shadow: 4px 4px 4px 0;
  14.         }
  15.         .zg{
  16.             font-size: 40px;
  17.             color:green;
  18.             box-shadow: 4px 4px 4px 0;
  19.         }
  20.         p{
  21.             font-size: 1.2rem;
  22.             color:blue;
  23.             background-color: lightgreen;
  24.             width: 100px;
  25.         }
  26.         .open-eye{
  27.            font-size: 30px;
  28.            color: blue;
  29.          }
  30.     </style>
  32. </head>
  33. <body>
  34.     <div>
  35.        <span class="iconfont icon-kehulaifang  lf">  </span>
  36.        <text> 客户来访</text>
  37.        <hr>
  38.         <span class="iconfont icon-zhuangangguanli zg"></span>
  39.         <p>转岗管理  </p>
  40.         <span class="iconfont open-eye"> &#xe79c;</span>    
  41.     </div>
  43. </body>
  44. </html>
Correcting teacher：GuanhuiGuanhui

Correction status：qualified

Teacher's comments：写的还可以！加油，尽量赶上进度！
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