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浮动和定位

时间:2021-01-14 11:07:15      阅读:0      评论:0      收藏:0      [点我收藏+]

标签:table   htm   --   hit   enter   margin   family   ack   out   

浮动

可以让多个块标签处于同一行 不用转换成行内元素 宽和高以及盒子模型的特征的以保留

<!DOCTYPE html>

<html>

       <head>

               <meta charset="utf-8">

               <title></title>

               <style type="text/css">

                       .outerDiv{

                               border: 1px solid blue;

                               width: 1000px;

                               height: 500px;

                               margin: 0px auto;

                       }

                       #d1,#d2,#d3{

                               border: 1px solid red;

                               width: 400px;

                               height: 200px;

                               /*向右  浮动*/

                               /*float: right;*/

                               /*向左 浮动*/

                               float:  left;

                               margin-left:20px;

                               margin-bottom: 20px;

                       }

                       #d1{

                               

                       }

                       #d2{

                               background-color:aqua;

                       }

                       #d3{

                               background-color: blueviolet;

                       }

               </style>

       </head>

       <body>

               <div class="outerDiv">

                       <div id="d1">

                               <h1>1</h1>

                       </div>

                       <div id="d2">

                               <h1>2</h1>

                       </div>

                       <div id="d3">

                               <h1>3</h1>

                       </div>

               </div>

       </body>

</html>

 

 

浮动案例

 

 

<head>

        <meta charset="utf-8">

        <title></title>

        <style>

            .ad_item a img{

                    width: 590px;

                    height: 160px;

            }

            .ad_item{

                    width: 590px;

                    height: 160px;

                    float: left;

            }

            #ad2,#ad4{

                    margin-left: 10px;

            }

            #ad3,#ad4{

                    margin-top: 20px;

            }

            #ad{

                    width: 1190px;

                    height: 340px;

                    margin: 0px auto;

            }

        </style>

</head>

<body>

        <div id="ad">

                <div id="ad1" class="ad_item">

                        <a href="https://cx.12306.cn/tlcx/index.html" target="_blank">

                                <img src="https://www.12306.cn/index/images/abanner01.jpg" />

                        </a>

                </div>

                <div id="ad2" class="ad_item">

                        <a href="https://cx.12306.cn/tlcx/index.html" target="_blank">

                                <img src="https://www.12306.cn/index/images/abanner02.jpg" />

                        </a>

                </div>

                <div id="ad3" class="ad_item">

                        <a href="https://cx.12306.cn/tlcx/index.html" target="_blank">

                                <img src="https://www.12306.cn/index/images/abanner03.jpg" />

                        </a>

                </div>

                <div id="ad4" class="ad_item">

                        <a href="https://cx.12306.cn/tlcx/index.html" target="_blank">

                                <img src="https://www.12306.cn/index/images/abanner04.jpg" />

                        </a>

                </div>

        </div>

        

</body>

 

 

 

定位

 

绝对定位

<!DOCTYPE html>

<html>

       <head>

               <meta charset="utf-8" />

               <title></title>

               <style>

                   .div1{

                           height: 200px;

                           width: 200px;

                           

                           /*绝对定位 基于父级标签原点

                           移开以后会自动释放父级标签原点位置*/

                           position: absolute;

                           top: 100px;

                           left: 100px;

                   }

                   .div2{

                           height: 200px;

                           width: 200px;

                           background-color: burlywood;

                           position: absolute;

                           top: 400px;

                           left: 400px;

                   }

               </style>

       </head>

       <body>

               <div class="div1">1</div>

               <div class="div2">2</div>

       </body>

</html>

相对定位

<!DOCTYPE html>

<html>

   <head>

       <meta charset="utf-8" />

       <title></title>

       <style>

           .div1{

                   height: 200px;

                   width: 200px;

                   

                   /*相对定位  相对于自身原来的位置,移开之后,不会释放原点位置*/

                   position: relative;

                   top: 100px;

                   left: 100px;

           }

           .div2{

                   height: 200px;

                   width: 200px;

                   background-color: burlywood;

                   position: relative;

                   top: 100px;

                   left: 100px;

           }

       </style>

   </head>

   <body>

       <div class="div1">1</div>

       <div class="div2">2</div>

   </body>

</html>

 

相对浏览器窗口定位

<!DOCTYPE html>

<html>

   <head>

       <meta charset="utf-8" />

       <title></title>

       <style>

           .div1{

                   height: 200px;

                   width: 200px;

                   

                   position: absolute;

                   top: 0px;

                   left: 0px;

           }

           .div2{

                   height: 200px;

                   width: 200px;

                   background-color: burlywood;

                   /*相对浏览器窗口定位*/

                   position: fixed;

                   top: 100px;

                   left: 100px;

           }

       </style>

   </head>

   <body>

       <div class="div1">1</div>

       <div class="div2">2</div>

   </body>

</html>

 

定位案例

 

 

 

<!DOCTYPE html>

<html>

    <head>

        <meta charset="utf-8">

        <title></title>

        <style>

                .note{

                        /*border: 1px solid red;*/

                        width: 50px;

                        height: 395px;

                        position: fixed;

                        right: 0px;

                        top: 150px;

                }

                .note_item1{

                        height: 86px;

                        width: 50px;

                        margin-bottom:5px;

                }

                .note_item2{

                        height: 122px;

                        width: 50px;

                }

        </style>

    </head>

    <body>

        <div class="note">

                <div class="note_item1">

                        <img src="img/note1.png" />

                </div>

                <div class="note_item1">

                        <img src="img/note2.png" />

                </div>

                <div class="note_item1">

                        <img src="img/note3.png" />

                </div>

                <div class="note_item2">

                        <img src="img/note4.png" />

                </div>

        </div>

        br*100

    </body>

</html>

 

 

 

 

 

 

第三节:列表标签及案例开发

 

 

 

<!DOCTYPE html>

<html>

    <head>

        <meta charset="utf-8">

        <title></title>

        <style>

            *{

                    padding: 0px;

                    margin: 0px;

            }

            .outerintroduce{

                    width: 1190px;

                    height: 300px;

                    margin: 0px auto;

            }

            .introduce{

                    border: 1px solid #3B99FC;

                    width: 388px;

                    height: 298px;

                    float: left;

            }

            .introduce h3{

                    

                    height: 40px;

                    text-align: center;

                    line-height: 40px;

                    

                    color: white;

            }

            .introduce ul{

                    

                    list-style: none;

                    margin-left: 50px;

                    list-style-image: url(img/dot.png);

            }

            .introduce ul li {

                    line-height: 45px;

            }

            .introduce ul a{

                    text-decoration: none;

                    color: darkslategray;

            }

            .introduce ul a:hover{

                    

                    color: black;

            }

            #i1,#i2{

                    margin-right: 10px;

            }

        </style>

    </head>

    <body>

        <div class="outerintroduce">

            <div id ="i1" class="introduce">

                <!--标题-->

                <h3>最新发布</h3>

                <!--列表-->

                <ul>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                </ul>

            </div>

            <div id ="i2" class="introduce">

                <!--标题-->

                <h3>最新发布</h3>

                <!--列表-->

                <ul>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                </ul>

            </div>

            <div class="introduce">

                <!--标题-->

                <h3>最新发布</h3>

                <!--列表-->

                <ul>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        <a href="#"><li>燃了!宣传片《新时代的中国高铁》震撼亮相</li></a>

                        

            </div>

        </div>

    </body>

</html>

 

浮动和定位

标签:table   htm   --   hit   enter   margin   family   ack   out   

原文地址:https://www.cnblogs.com/vincentmax/p/14272677.html

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