css3实现radio选择效果

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

    
    苹果

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

    
    
    
    
    
    
    


.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;
}




    
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