CSS3不一样的下拉选择框

本例中包含两个下拉选择框的动画示例，本例中并未使用select标签。本例中第一个案例也可用于标题、导航栏等位置。

案例一：

html布局

<div class="content">

　　<div class="select">

　　　　<p att="select p">所有选项</p>

　　　　<ul att="select ul">

　　　　　　<li data-value="所有选项" class="selected">所有选项</li>

　　　　　　<li data-value="html">html</li>

　　　　　　<li data-value="css">css</li>

　　　　　　<li data-value="javascript">javascript</li>

　　　　　　<li data-value="jQuery">jQuery</li>

　　　　</ul>

　　</div>

</div>

整体显示样式

<style type="text/css">

　　body{
　　　　padding: 0;

　　　　margin: 0;

　　　　background-color: #0099cc;

　　　　color: #333333;

　　}

　　.content{

　　　　padding-top: 5%;

　　}

　　.content .select{

　　　　width: 300px;

　　　　height: 40px;

　　　　margin: 0 auto;

　　　　font-family: "Microsoft Yahei";

　　　　font-size: 16px;

　　　　background-color: #ffffff;

　　　　position: relative;

　　}

</style>

下拉列表样式及动画

[att~=select]{

    padding:;

    margin:;

}

.content .select:after{

    content: "";

    display: block;

    width: 10px;

    height: 10px;

    border-left: 1px #cccccc solid;

    border-bottom: 1px #cccccc solid;

    position: absolute;

    top: 11px;

    right: 12px;

    -webkit-transform: rotate(-45deg);

    -moz-transform: rotate(-45deg);

    -ms-transform: rotate(-45deg);

    -o-transform: rotate(-45deg);

    transform: rotate(-45deg);

    -webkit-transition: -webkit-transform .3s ease-in, top .3s ease-in;

    -moz-transition: -moz-transform .3s ease-in, top .3s ease-in;

    -ms-transition:  -ms-transform .3s ease-in, top .3s ease-in;

    -o-transition: -o-transform .3s ease-in, top .3s ease-in;

    transition: transform .3s ease-in, top .3s ease-in;

}

.content .select p{

    padding: 0 15px;

    line-height: 40px;

    /*设置光标样式：手型*/

    cursor: pointer;

}

.content .select ul{

    width: 100%;

    /*这样设置相当于隐藏了ul，便实现了下拉样式*/

    max-height:;

    list-style-type: none;

    background-color: #ffffff;

    overflow-y: auto;

    position: absolute;

    top: 40px;

    left:;

    -webkit-transition: max-height .3s ease-in;

    -moz-transition: max-height .3s ease-in;

    -ms-transition: max-height .3s ease-in;

    -o-transition: max-height .3s ease-in;

    transition: max-height .3s ease-in;

}

.content .select ul li{

    padding: 0 15px;

    line-height: 40px;

    cursor: pointer;

}

.content .select ul li:hover{

    background-color: #e0e0e0;

}

.content .select ul li.selected{

    background-color: #3399ff;

    color: #ffffff;

}

@-webkit-keyframes slide-down {

    0%{

        -webkit-transform: scale(1, 0);

        -moz-transform: scale(1, 0);

        -ms-transform: scale(1, 0);

        -o-transform: scale(1, 0);

        transform: scale(1, 0);

    }

    25%{

        -webkit-transform: scale(1, 1.2);

        -moz-transform: scale(1, 1.2);

        -ms-transform: scale(1, 1.2);

        -o-transform: scale(1, 1.2);

        transform: scale(1, 1.2);

    }

    50%{

        -webkit-transform: scale(1, 0.85);

        -moz-transform: scale(1, 0.85);

        -ms-transform: scale(1, 0.85);

        -o-transform: scale(1, 0.85);

        transform: scale(1, 0.85);

    }

    75%{

        -webkit-transform: scale(1, 1.05);

        -moz-transform: scale(1, 1.05);

        -ms-transform: scale(1, 1.05);

        -o-transform: scale(1, 1.05);

        transform: scale(1, 1.05);

    }

    100%{

        -webkit-transform: scale(1, 1);

        -moz-transform: scale(1, 1);

        -ms-transform: scale(1, 1);

        -o-transform: scale(1, 1);

        transform: scale(1, 1);

    }

}

@-moz-keyframes slide-down {

    0%{

        -webkit-transform: scale(1, 0);

        -moz-transform: scale(1, 0);

        -ms-transform: scale(1, 0);

        -o-transform: scale(1, 0);

        transform: scale(1, 0);

    }

    25%{

        -webkit-transform: scale(1, 1.2);

        -moz-transform: scale(1, 1.2);

        -ms-transform: scale(1, 1.2);

        -o-transform: scale(1, 1.2);

        transform: scale(1, 1.2);

    }

    50%{

        -webkit-transform: scale(1, 0.85);

        -moz-transform: scale(1, 0.85);

        -ms-transform: scale(1, 0.85);

        -o-transform: scale(1, 0.85);

        transform: scale(1, 0.85);

    }

    75%{

        -webkit-transform: scale(1, 1.05);

        -moz-transform: scale(1, 1.05);

        -ms-transform: scale(1, 1.05);

        -o-transform: scale(1, 1.05);

        transform: scale(1, 1.05);

    }

    100%{

        -webkit-transform: scale(1, 1);

        -moz-transform: scale(1, 1);

        -ms-transform: scale(1, 1);

        -o-transform: scale(1, 1);

        transform: scale(1, 1);

    }

}

@-o-keyframes slide-down {

    0%{

        -webkit-transform: scale(1, 0);

        -moz-transform: scale(1, 0);

        -ms-transform: scale(1, 0);

        -o-transform: scale(1, 0);

        transform: scale(1, 0);

    }

    25%{

        -webkit-transform: scale(1, 1.2);

        -moz-transform: scale(1, 1.2);

        -ms-transform: scale(1, 1.2);

        -o-transform: scale(1, 1.2);

        transform: scale(1, 1.2);

    }

    50%{

        -webkit-transform: scale(1, 0.85);

        -moz-transform: scale(1, 0.85);

        -ms-transform: scale(1, 0.85);

        -o-transform: scale(1, 0.85);

        transform: scale(1, 0.85);

    }

    75%{

        -webkit-transform: scale(1, 1.05);

        -moz-transform: scale(1, 1.05);

        -ms-transform: scale(1, 1.05);

        -o-transform: scale(1, 1.05);

        transform: scale(1, 1.05);

    }

    100%{

        -webkit-transform: scale(1, 1);

        -moz-transform: scale(1, 1);

        -ms-transform: scale(1, 1);

        -o-transform: scale(1, 1);

        transform: scale(1, 1);

    }

}

@keyframes slide-down {

    0%{

        -webkit-transform: scale(1, 0);

        -moz-transform: scale(1, 0);

        -ms-transform: scale(1, 0);

        -o-transform: scale(1, 0);

        transform: scale(1, 0);

    }

    25%{

        -webkit-transform: scale(1, 1.2);

        -moz-transform: scale(1, 1.2);

        -ms-transform: scale(1, 1.2);

        -o-transform: scale(1, 1.2);

        transform: scale(1, 1.2);

    }

    50%{

        -webkit-transform: scale(1, 0.85);

        -moz-transform: scale(1, 0.85);

        -ms-transform: scale(1, 0.85);

        -o-transform: scale(1, 0.85);

        transform: scale(1, 0.85);

    }

    75%{

        -webkit-transform: scale(1, 1.05);

        -moz-transform: scale(1, 1.05);

        -ms-transform: scale(1, 1.05);

        -o-transform: scale(1, 1.05);

        transform: scale(1, 1.05);

    }

    100%{

        -webkit-transform: scale(1, 1);

        -moz-transform: scale(1, 1);

        -ms-transform: scale(1, 1);

        -o-transform: scale(1, 1);

        transform: scale(1, 1);

    }

}

.content .select.open ul{

    max-height: 250px;

    transform-origin: 50% 0;

    -webkit-animation: slide-down 0.5s ease-in;

    -moz-animation: slide-down 0.5s ease-in;

    -o-animation: slide-down 0.5s ease-in;

    animation: slide-down 0.5s ease-in;

    -webkit-transition: max-height .2s ease-in;

    -moz-transition: max-height .2s ease-in;

    -ms-transition: max-height .2s ease-in;

    -o-transition: max-height .2s ease-in;

    transition: max-height .2s ease-in;

}

.content .select.open:after{

    -webkit-transform: rotate(-225deg);

    -moz-transform: rotate(-225deg);

    -ms-transform: rotate(-225deg);

    -o-transform: rotate(-225deg);

    transform: rotate(-225deg);

    top: 18px;

    -webkit-transition: all .3s ease-in;

    -moz-transition: all .3s ease-in;

    -ms-transition: all .3s ease-in;

    -o-transition: all .3s ease-in;

    transition: all .3s ease-in;

}

使用JavaScript实现点击事件

实现点击事件还需要引用jQuery插件

<script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>

<script type="text/javascript">

　　$(function(){

　　　　$('.select > p').on('click', function (e) {
　　　　　　// 检查class属性是否有open值，有则删除，没有则添加

　　　　　　$('.select').toggleClass('open');
　　　　　　// 处理冒泡事件

　　　　　　e.stopPropagation();

　　　　});

　　　　$('.select ul li').on('click', function (e) {

　　　　　　var _this = $(this);

　　　　　　$('.select > p').text(_this.attr('data-value'));

　　　　　　_this.addClass('selected').siblings().removeClass('selected');

　　　　　　$('.select').removeClass('open');

　　　　　　e.stopPropagation();

　　　　});

　　　　$(document).on('click', function () {

　　　　　　$('.select').removeClass('open');

　　　　});

　　});

</script>

案例二：

案例二与案例一的html布局相似，只是在p标签后面多了一个i标签，用来显示右侧的三横，如下图

<div class="content">

　　<div class="select">

　　　　<p att="select p">所有选项</p>

　　　　<i></i>

　　　　<ul att="select ul">

　　　　　　<li data-value="所有选项" class="selected">所有选项</li>

　　　　　　<li data-value="html">html</li>

　　　　　　<li data-value="css">css</li>

　　　　　　<li data-value="javascript">javascript</li>

　　　　　　<li data-value="jQuery">jQuery</li>

　　　　</ul>

　　</div>

</div>

css

整体样式与案例一相同

接下来是css样式

[att~=select]{

    padding:;

    margin:;

}

.content .select > i{

    position: absolute;

    top: 12px;

    right: 10px;

    width: 20px;

    height: 12px;

    border-top: 3px #cccccc solid;

    border-bottom: 3px #cccccc solid;

    cursor: pointer;

}

.content .select > i:after{

    content: "";

    position: absolute;

    top: 4px;

    left:;

    width: 100%;

    height: 3px;

    background-color: #cccccc;

}

.content .select p{

    padding: 0 15px;

    line-height: 40px;

    /*设置光标样式：手型*/

    cursor: pointer;

}

.content .select ul{

    width: 100%;

    /*这样设置相当于隐藏了ul，便实现了下拉样式*/

    height:;

    list-style-type: none;

    background-color: #ffffff;

    position: absolute;

    top: 20px;

    left:;

    z-index:;

    overflow: hidden;

    -webkit-transition: top .2s ease, height .2s ease;

    -moz-transition: top .2s ease, height .2s ease;

    -ms-transition: top .2s ease, height .2s ease;

    -o-transition: top .2s ease, height .2s ease;

    transition: top .2s ease, height .2s ease;

}

.content .select ul li{

    padding: 0 15px;

    line-height: 40px;

    cursor: pointer;

    opacity:;

    -webkit-transform: translateX(300px);

    -moz-transform: translateX(300px);

    -ms-transform: translateX(300px);

    -o-transform: translateX(300px);

    transform: translateX(300px);

    -webkit-transition: transform .3s ease;

    -moz-transition: transform .3s ease;

    -ms-transition: transform .3s ease;

    -o-transition: transform .3s ease;

    transition: transform .3s ease;

}

.content .select ul li:hover{

    background-color: #e0e0e0;

}

.content .select ul li.selected{

    background-color: #3399ff;

    color: #ffffff;

}

.content .select.open ul{

    height: 200px;

    transform-origin: 50% 0;

    top: -80px;

    -webkit-transition: all .2s ease;

    -moz-transition: all .2s ease;

    -ms-transition: all .2s ease;

    -o-transition: all .2s ease;

    transition: all .2s ease;

}

.content .select.open ul li{

    opacity:;

    -webkit-transform: translateX(0);

    -moz-transform: translateX(0);

    -ms-transform: translateX(0);

    -o-transform: translateX(0);

    transform: translateX(0);

}

.content .select.open ul li:nth-child(1){

    -webkit-transition: opacity .2s ease .05s, -webkit-transform .3s ease .05s;

    -moz-transition: opacity .2s ease .05s, -moz-transform .3s ease .05s;

    -ms-transition: opacity .2s ease .05s, -ms-transform .3s ease .05s;

    -o-transition: opacity .2s ease .05s, -o-transform .3s ease .05s;

    transition: opacity .2s ease .05s, transform .3s ease .05s;

}

.content .select.open ul li:nth-child(2){

    -webkit-transition: opacity .2s ease .1s, -webkit-transform .3s ease .1s;

    -moz-transition: opacity .2s ease .1s, -moz-transform .3s ease .1s;

    -ms-transition: opacity .2s ease .1s, -ms-transform .3s ease .1s;

    -o-transition: opacity .2s ease .1s, -o-transform .3s ease .1s;

    transition: opacity .2s ease .1s, transform .3s ease .1s;

}

.content .select.open ul li:nth-child(3){

    -webkit-transition: opacity .2s ease .15s, -webkit-transform .3s ease .15s;

    -moz-transition: opacity .2s ease .15s, -moz-transform .3s ease .15s;

    -ms-transition: opacity .2s ease .15s, -ms-transform .3s ease .15s;

    -o-transition: opacity .2s ease .15s, -o-transform .3s ease .15s;

    transition: opacity .2s ease .15s, transform .3s ease .15s;

}

.content .select.open ul li:nth-child(4){

    -webkit-transition: opacity .2s ease .2s, -webkit-transform .3s ease .2s;

    -moz-transition: opacity .2s ease .2s, -moz-transform .3s ease .2s;

    -ms-transition: opacity .2s ease .2s, -ms-transform .3s ease .2s;

    -o-transition: opacity .2s ease .2s, -o-transform .3s ease .2s;

    transition: opacity .2s ease .2s, transform .3s ease .2s;

}

.content .select.open ul li:nth-child(5){

    -webkit-transition: opacity .2s ease .25s, -webkit-transform .3s ease .25s;

    -moz-transition: opacity .2s ease .25s, -moz-transform .3s ease .25s;

    -ms-transition: opacity .2s ease .25s, -ms-transform .3s ease .25s;

    -o-transition: opacity .2s ease .25s, -o-transform .3s ease .25s;

    transition: opacity .2s ease .25s, transform .3s ease .25s;

}

js与案例一相同

CSS3不一样的下拉选择框的相关教程结束。