通过css3实现开关选择按钮

 

通过css属性实现如图所示按钮

要点：通过checkbox选中与否的状态与兄弟选择器实现相关功能
1.设置开关大小并设置定位方式为relative

.swift-btn {

    position: relative;

    display: inline-block;

    width: 50px;

    height: 25px;

}

2.设置checkbox属性，并设置为不可见状态

.swift-btn input[type='checkbox'] {

position: absolute;

width: 50px;

height: 25px;

opacity: 0;

z-index: 9;

outline: none;

}

3.设置按钮样式，通过伪类元素实现，并添加过渡动画

.swift-btn > label{

    position: absolute;

    display: inline-block;

    width: 50px;

    height: 25px;

    border-radius: 25px;

    border: 1px solid #ddd;

    transition: all 0.3s ease;

    -webkit-transition: all 0.3s ease;

    -moz-transition: all 0.3s ease;

}

.swift-btn > label:before {

    content: '';

    position: absolute;

    display: inline-block;

    left: 40px;

    width: 25px;

    height: 25px;

    border-radius: 20px;

    line-height: 25px;

    text-indent: -1px;

}

.swift-btn > label:after {

    content: '';

    position: absolute;

    display: inline-block;

width: 24px;

    height: 24px;

    left: 0;

    top: 1px;

    border-radius: 1px;

    box-shadow:2px 0px 1px #ddd;

    border-radius: 15px;

    transition: left 0.3s ease;

    -webkit-transition: left 0.3s ease;

    -moz-transition: left 0.3s ease;

}

4.设置input选中后的样式

.swift-btn input[type='checkbox']:checked + label{

border: 1px solid #000;

background-color: #000;

}

.swift-btn input[type='checkbox']:checked + label::before {

display: inline-block;

color: #fff;

text-indent: -25px;

}

.swift-btn input[type='checkbox']:checked + label::after {

left: 26px;

top: 1px;

width: 24px;

height: 24px;

border: 0;

box-shadow: none;

box-sizing: content-box;

}

完整代码示例

<!DOCTYPE html>

<html>

<meta charset='utf-8'>

<style>

.swift-btn {

position: relative;

display: inline-block;

width: 50px;

height: 25px;

}

.swift-btn input[type='checkbox'] {

position: absolute;

width: 50px;

height: 25px;

opacity: 0;

z-index: 9;

outline: none;

}

.swift-btn > label{

position: absolute;

display: inline-block;

width: 50px;

height: 25px;

border-radius: 25px;

border: 1px solid #ddd;

transition: all 0.3s ease;

-webkit-transition: all 0.3s ease;

-moz-transition: all 0.3s ease;

}

.swift-btn > label:before {

content: '';

position: absolute;

display: inline-block;

left: 40px;

width: 25px;

height: 25px;

border-radius: 20px;

line-height: 25px;

text-indent: -1px;

}

.swift-btn > label:after {

content: '';

position: absolute;

display: inline-block;

width: 24px;

height: 24px;

left: 0;

top: 1px;

border-radius: 1px;

box-shadow:2px 0px 1px #ddd;

border-radius: 15px;

background-color: #fff;

transition: left 0.3s ease;

-webkit-transition:
left 0.3s ease;

-moz-transition: left 0.3s ease;

}

.swift-btn input[type='checkbox']:checked + label{

border: 1px solid #000;

background-color: #000;

}

.swift-btn input[type='checkbox']:checked + label::before {

display: inline-block;

color: #fff;

text-indent: -25px;

}

.swift-btn input[type='checkbox']:checked + label::after {

left: 26px;

top: 1px;

width: 24px;

height: 24px;

border: 0;

box-shadow: none;

box-sizing: content-box;

}

</style>

<body>

<span class="add-item-status swift-btn">

<input type="checkbox" name="" id='checkbox' />

<label class="" for='checkbox'></label>

</span>

</body>

</html>