纯css3实现美化复选框和手风琴效果（详细）

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关键技术点和原理：

原理就是把 checkbox或 radio 给隐藏掉，然后给选框绑定一个label标签。

然后用label标签作为容器，在里面放一个：before或一个after

用before模拟选框的框，用after来模拟选框的填充

通过

.magic-checkbox:checked + label:after {/*选框被选中时显示after填充*/
display: block;
}

来确定是否选中复选框，如果checked就把after的显示。

先贴出html的代码

<div id="main">
<div class="demo">
<div class="col">
<h4>Checkbox(复选按钮)</h4> <div class="opt">
<input class="magic-checkbox" type="checkbox" name="layout" id="c1">
<label for="c1">Normal</label>
</div>
<div class="opt">
<input class="magic-checkbox" type="checkbox" name="layout" id="c2" checked>
<label for="c2">Checked</label>
</div>
<div class="opt">
<input class="magic-checkbox" type="checkbox" name="layout" id="c3" value="option2" disabled>
<label for="c3" style="color:#ccc">Disabled</label>
</div>
<div class="opt">
<input class="magic-checkbox" type="checkbox" name="layout" id="c4" checked disabled>
<label for="c4" style="color:#ccc">Checked && Disabled</label>
</div> </div> <div class="col">
<h4>Radio(单选按钮)</h4>
<div class="opt">
<input class="magic-radio" type="radio" name="radio" id="r1" value="option1">
<label for="r1">Normal</label>
</div>
<div class="opt">
<input class="magic-radio" type="radio" name="radio" id="r2" value="option2" checked>
<label for="r2">Checked</label>
</div>
<div class="opt">
<input class="magic-radio" type="radio" name="radio" id="r3" value="option3" disabled>
<label for="r3" style="color:#ccc">禁用</label>
</div>
<div class="opt">
<input class="magic-radio" type="radio" id="r4" value="option4" checked disabled>
<label for="r4" style="color:#ccc">Checked && Disabled</label>
</div>
</div>
</div></div>

首先html的结构必须是

<div class="opt">
<input class="magic-checkbox" type="checkbox" name="layout" id="c1">
<label for="c1">Normal</label>
</div>

切记

<input class="magic-checkbox" type="checkbox" name="layout" id="c1">
<label for="c1">Normal</label>

id和for的值一定要一致这是通用写法为了把label和input绑定在一块

下面给出css代码

/*--相关的单选复选按钮--*/
@keyframes hover-color { /**复选框或单选框边框 hover**/
from {
border-color: #c0c0c0; }
to {
border-color: #3e97eb; } }.magic-radio,
.magic-checkbox { /**必须要把 radio和 checkbox的隐藏或者切割掉**/
position: absolute;
display: none; }.magic-radio[disabled], /**radio checkbox 指定disabled html属性时的鼠标指针**/
.magic-checkbox[disabled] {
cursor: not-allowed; }.magic-radio + label,
.magic-checkbox + label {
position: relative;
display: block;
padding-left: 30px;
cursor: pointer;
vertical-align: middle;
}
.magic-radio + label:hover:before, /*选矿的 hover边框动画 */
.magic-checkbox + label:hover:before {
animation-duration: 0.4s;
animation-fill-mode: both;
animation-name: hover-color; }
.magic-radio + label:before,
.magic-checkbox + label:before {/*用before来模拟选框的框*/
position: absolute;
top:;
left:;
display: inline-block;
width: 20px;
height: 20px;
content: '';
border: 1px solid #c0c0c0; }
.magic-radio + label:after,
.magic-checkbox + label:after {/*用after模拟选框的对号或园点默认先隐藏*/
position: absolute;
display: none;
content: '';
}.magic-radio[disabled] + label,
.magic-checkbox[disabled] + label {/*选框被禁用时的外观*/
cursor: not-allowed;
color: #e4e4e4;
}
.magic-radio[disabled] + label:hover, .magic-radio[disabled] + label:before, .magic-radio[disabled] + label:after,
.magic-checkbox[disabled] + label:hover,
.magic-checkbox[disabled] + label:before,
.magic-checkbox[disabled] + label:after {
cursor: not-allowed; }/*禁用时的指针*/
.magic-radio[disabled] + label:hover:before,
.magic-checkbox[disabled] + label:hover:before {
border: 1px solid #e4e4e4;
animation-name: none; }/*禁用时的选框和填充*/
.magic-radio[disabled] + label:before,
.magic-checkbox[disabled] + label:before {
border-color: #e4e4e4; }.magic-radio:checked + label:before,
.magic-checkbox:checked + label:before {
animation-name: none; }/*选框被选中时去掉hover 动画*/.magic-radio:checked + label:after,
.magic-checkbox:checked + label:after {/*选框被选中时显示after填充*/
display: block;
}.magic-radio + label:before {/*radio的选框应该是个圆形*/
border-radius: 50%; }.magic-radio + label:after {/*模拟出radio的园点填充*/
top: 7px;
left: 7px;
width: 8px;
height: 8px;
border-radius: 50%;
background: #3e97eb; }.magic-radio:checked + label:before {
border: 1px solid #3e97eb; }.magic-radio:checked[disabled] + label:before {
border: 1px solid #c9e2f9; }.magic-radio:checked[disabled] + label:after {
background: #c9e2f9; }.magic-checkbox + label:before {
border-radius: 3px; }.magic-checkbox + label:after {/*模拟出checkbox选框的对号填充*/
top: 2px;
left: 7px;
box-sizing: border-box;
width: 6px;
height: 12px;
transform: rotate(45deg);
border-width: 2px;
border-style: solid;
border-color: #fff;
border-top:;
border-left:; }.magic-checkbox:checked + label:before {
border: #3e97eb;
background: #3e97eb; }.magic-checkbox:checked[disabled] + label:before {
border: #c9e2f9;
background: #c9e2f9; }