CSS3学习笔记（4）-上下滑动展开的按钮_html/css

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CSS3学习笔记（4）-上下滑动展开的按钮_html/css_WEB-ITnose

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Jun 24, 2016 am 11:35 AM

好吧，我最近没有什么进步，其实吧，我在偷懒耶，这几天太冷落代码了，都在做设计，晕乎乎的，

下面来看看我以前写的一个上下滑动展开的按钮效果：

这类的效果经常会在一些网站页面下载按钮处看到，当你鼠标悬浮在下载按钮时，会提醒你是否已注册，或者点击登录什么的小提示~~~~~

一、页面的主体布局

<!DOCTYPE html><html>    <head>        <meta charset="utf-8" />        <title></title>        <link type="text/css" rel="stylesheet" href="css/both_slid_menu.css" />    </head>    <body>        <div class="both_sild_menu">            <div class="sild_top">我是上面</div>            <a href="#" target="_blank">鼠标放在我上面试试</a>            <div class="sild_bottom">我是下面</div>            </div>    </body></html>

布局就不多说了，很简单~~~~~

二、CSS样式（主要是CSS3）

先说一下动画的原理：

（1）先来布局，我是将三个DIV并列排出来，如下图：

（2）把sild_top和sild_bottom的两个子级按钮置于a标签按钮的下方，用定位里面的z-index属性

（3）然后sild_top和sild_bottom的两个子级按钮进行位移到a标签按钮正下方

（4）为sild_top和sild_bottom的两个子级按钮设置动画

.both_sild_menu{    text-align: center;    width: 300px;}.both_sild_menu .sild_top{    text-decoration: none;    padding: 10px;    background-color: #6c987e;    border-radius: 10px 10px 0 0;           /*让它的位置在名为both_sild_menu a的底部，且隐藏起来*/    transform: translate(0,40px);     opacity: 0;                   /*置于底部后再让它透明度为0，不显示*/    position: relative;    z-index: 1;}.both_sild_menu a{    display: block;    text-decoration: none;    padding: 10px;    background-color: #7eedaa;    position: relative;    z-index: 2;    /*让它的位置在顶部*/}.both_sild_menu .sild_bottom{    text-decoration: none;    padding: 10px;    background-color: #6c987e;    border-radius: 0 0 10px 10px;        /*让它的位置在名为both_sild_menu a的底部，且隐藏起来*/    opacity: 0;    transform: translate(0,-40px);    position: relative;    z-index: 1;    }.both_sild_menu .sild_top,.both_sild_menu .sild_bottom{      /*给两个DIV设置动画的属性*/    transition: all 0.2s ease-in-out 0s;           -moz-transition: all 0.2s ease-in-out 0s;    -ms-transition: all 0.2s ease-in-out 0s;    -o-transition: all 0.2s ease-in-out 0s;    -webkit-transition: all 0.2s ease-in-out 0s;}/*名为sild_top的div动画效果设置开始*/.both_sild_menu:hover .sild_top{               /*当鼠标悬浮在框架上时，将名为sild_top的div透明度变为1*/    opacity: 1;}.both_sild_menu:hover .sild_top{                /*当鼠标悬浮在框架上时，将名为sild_top的div从初始的Y轴40px移动到Y轴0px位置*/    transform: translate(0,0);    -moz-transform: translate(0,0);    -o-transform: translate(0,0);    -ms-transform: translate(0,0);    -webkit-transform: translate(0,0);}/*名为sild_top的div动画效果设置结束*//*名为sild_bottom的div动效果设置画开始*/.both_sild_menu:hover .sild_bottom{    opacity: 1;}.both_sild_menu:hover .sild_bottom{    transform: translate(0,0);    -moz-transform: translate(0,0);    -o-transform: translate(0,0);    -ms-transform: translate(0,0);    -webkit-transform: translate(0,0);}/*名为sild_bottom的div动画效果设置结束*/

原理我已经说的很清楚了，配合上面的程序应该很容易看出来吧~~~~~

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