CSS如何实现手机中开关的实例分析

<input type="checkbox" id="1" class="checkbox">
<label class="switch" for="1"></label>

<style>
 .checkbox {
 display: none;
 }
 .switch {
 width: 50px;
 height: 31px;
 background: #56ACFE;
 border-radius: 20px;
 padding: 1px;
 box-sizing: border-box;
 display: inline-block;
 margin-top: 15px;
 }
 .switch:after {
 content: '';
 box-shadow: 0 3px 8px 0 rgba(0,0,0,0.15), 0 1px 1px 0 rgba(0,0,0,0.16), 0 3px 1px 0 rgba(0,0,0,0.10);
 width: 28px;
 height: 28px;
 background: #fff;
 border-radius: 50%;
 display: block;
 margin-left: 1px;
 float: left;
 transition: all 0.5s;
 }
 .checkbox:checked+.switch:after {
 margin-left: 20px;
 }
 .checkbox:checked+.switch {
 background: #ccc;
 }
</style>