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>