该手记通过简单教程，实现如图所示的radio单选样式效果

html结构，div中包含一个radio单选框与一个指向该单选框的label标签

初始化相关结构样式，设置div定位为relative，radio与label为absolute定位

.radio-check {

position: relative;

height: 35px;

}

.radio-check > input {

position: absolute;

left: 0;

top: 0;

width: 20px;

height:20px;

opacity: 0;

}

.radio-check > label {

position: absolute;

left: 30px;

line-height: 20px;

top: 0px;

}

通过伪类::before与::after，实现选中效果

初始化before与after状态

.radio-check > label:before {

content: '';

position: absolute;

left: -30px;

top: 0px;

display: inline-block;

width: 20px;

height: 20px;

border-radius: 50%;

border: 1px solid #ddd;

transition: all 0.3s ease;

-webkit-transition: all 0.3s ease;

-moz-transition: all 0.3s ease;

}

.radio-check > label:after {

content: '';

position: absolute;

left: -30px;

top: 0px;

display: inline-block;

width: 10px;

height: 10px;

border-radius: 50%;

margin-top: 6px;

margin-left: 6px;

transition: all 0.3s ease;

-webkit-transition: all 0.3s ease;

-moz-transition: all 0.3s ease;

}

利用radio选中状态的:checked伪类选择器与兄弟选择器，实现选中效果

.radio-check input[type='radio']:checked + label:before {

border-color: #4cd764;

}

.radio-check input[type='radio']:checked + label:after {

background: #4cd764;

}

整体代码示例

Examples

.radio-check {

position: relative;

height: 35px;

}

.radio-check > input {

position: absolute;

left: 0;

top: 0;

width: 20px;

height:20px;

opacity: 0;

}

.radio-check > label {

position: absolute;

left: 30px;

line-height: 20px;

top: 0px;

}

.radio-check > label:before {

content: '';

position: absolute;

left: -30px;

top: 0px;

display: inline-block;

width: 20px;

height: 20px;

border-radius: 50%;

border: 1px solid #ddd;

transition: all 0.3s ease;

-webkit-transition: all 0.3s ease;

-moz-transition: all 0.3s ease;

}

.radio-check > label:after {

content: '';

position: absolute;

left: -30px;

top: 0px;

display: inline-block;

width: 10px;

height: 10px;

border-radius: 50%;

margin-top: 6px;

margin-left: 6px;

transition: all 0.3s ease;

-webkit-transition: all 0.3s ease;

-moz-transition: all 0.3s ease;

}

.radio-check input[type='radio']:checked + label:before {

border-color: #4cd764;

}

.radio-check input[type='radio']:checked + label:after {

background: #4cd764;

}