选择单选按钮时更改单选按钮标签的颜色？

这个问题在这里已经有了答案：

有没有一个CSS父母选择器？ 26个答案

---

您无法设置label的样式（因为我们在CSS中没有父级选择器），但是您可以设置checkbox radiobutton或checkbox的文本样式 - 预期结果 - 使用以下代码：

label input[type="radio"]:checked ~ span {
  color: #78a025;
}
label input[type="checkbox"]:checked ~ span {
  color: #78a025;
}

参见下面的演示：

label.btn span {
  font-size: 16px;
}
i.fa {
  font-size: 24px;
}
i.fa.fa-dot-circle-o {
  font-size: 24px;
}
label input[type="radio"] {
  color: #c8c8c8;
  display: inline;
}
label input[type="radio"] ~ i.fa.fa-dot-circle-o {
  display: none;
}
label input[type="radio"]:checked ~ i.fa.fa-circle-o {
  display: none;
}
label input[type="radio"]:checked ~ i.fa.fa-dot-circle-o {
  color: #78a025;
  display: inline;
  font-size: 24px;
}
label:hover input[type="radio"] ~ i.fa {
  color: #78A025;
}
label input[type="checkbox"] ~ i.fa.fa-square-o {
  color: #c8c8c8;
  display: inline;
}
label input[type="checkbox"] ~ i.fa.fa-check-square-o {
  display: none;
}
label input[type="checkbox"]:checked ~ i.fa.fa-square-o {
  display: none;
}
label input[type="checkbox"]:checked ~ i.fa.fa-check-square-o {
  color: #78A025;
  display: inline;
}
label:hover input[type="checkbox"] ~ i.fa {
  color: #78a025;
}
div[data-toggle="buttons"] label.active {
  color: #78a025;
}
div[data-toggle="buttons"] label {
  display: inline-block;
  padding: 6px 12px;
  margin-bottom: 0;
  font-size: 14px;
  font-weight: normal;
  line-height: 2em;
  text-align: left;
  white-space: nowrap;
  vertical-align: top;
  cursor: pointer;
  background-color: none;
  border: 0px solid #c8c8c8;
  border-radius: 3px;
  color: #c8c8c8;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
}
div[data-toggle="buttons"] label:hover {
  color: #78A025;
}
div[data-toggle="buttons"] label:active,
div[data-toggle="buttons"] label.active {
  -webkit-box-shadow: none;
  box-shadow: none;
}
label input[type="radio"]:checked ~ span {
  color: #78a025;
}
label input[type="checkbox"]:checked ~ span {
  color: #78a025;
}

<link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.min.css" rel="stylesheet">

<div class="row">
  <div class="col-xs-12">
    <br>Vertical radio:
    <br>
    <div class="btn-group btn-group-vertical" data-toggle="buttons">
      <label class="btn">
        <input type="radio" name='gender1' checked><i class="fa fa-circle-o fa-2x"></i><i class="fa fa-dot-circle-o fa-2x"></i>  <span>  Male</span>
      </label>
      <label class="btn">
        <input type="radio" name='gender1'><i class="fa fa-circle-o fa-2x"></i><i class="fa fa-dot-circle-o fa-2x"></i><span> Female</span>
      </label>
    </div>

  </div>
</div>

<div class="row">
  <div class="col-xs-12">
    <hr>Vertical checkbox:
    <br>
    <div class="btn-group btn-group-vertical" data-toggle="buttons">
      <label class="btn">
        <input type="checkbox" name='email1' checked><i class="fa fa-square-o fa-2x"></i><i class="fa fa-check-square-o fa-2x"></i>  <span> Marketing Email</span>
      </label>
      <label class="btn">
        <input type="checkbox" name='email2'><i class="fa fa-square-o fa-2x"></i><i class="fa fa-check-square-o fa-2x"></i><span> Alert Email</span>
      </label>
      <label class="btn">
        <input type="checkbox" name='email3'><i class="fa fa-square-o fa-2x"></i><i class="fa fa-check-square-o fa-2x"></i><span> Account Email</span>
      </label>
    </div>


  </div>
</div>

---

编辑：哇！ 我完全错过了这样一个事实，即您的文本跨度实际上在标签本身内，所以您的解决方案可以很好地在CSS中实现。 而不是在这里提供你的答案，似乎Kukkuz的答案已经完成了！

我将在这里留下这个答案，这样你就可以看到jQuery解决方案的语法可能是什么样子，但我肯定会建议尽可能使用纯CSS！

---

正如你在评论中提到的，你可以使用jQuery解决方案，所以下面我提供了一个。

这里是一个例子：https：//jsfiddle.net/j7n9zyaj/

代码：

//When a checkbox/radio is clicked...
$('input[type=radio], input[type=checkbox]').on("click", function() {

    var $t = $(this);

    //If it's checked
    if ($t.is(':checked')) {
        //Add the green class to the parent
        $t.parent().addClass("greenText");
    } else {
        //Remove the green class from the parent
        $t.parent().removeClass("greenText");
    }

});

你只需要添加这个简单的类到你的CSS：

.greenText {
    color: #78A025 !important;
}

---

尝试更改label时使用span更改颜色，请使用~运算符，如：

label input[type="radio"]:checked ~ span {
    color: #78a025;
}

label input[type="checkbox"]:checked ~ span {
    color: #78a025;
}

看看下面的代码片段：

label.btn span {
  font-size: 16px ;
}
i.fa{
  font-size: 24px;
}
i.fa.fa-dot-circle-o{
  font-size: 24px;
}

label input[type="radio"]{
    color: #c8c8c8;    display: inline;
}
label input[type="radio"] ~ i.fa.fa-dot-circle-o{
    display: none;
}
label input[type="radio"]:checked ~ i.fa.fa-circle-o{
    display: none;
}
label input[type="radio"]:checked ~ i.fa.fa-dot-circle-o{
    color: #78a025;    
    display: inline;
    font-size: 24px;
}

label input[type="radio"]:checked ~ span {
    color: #78a025;
}



label:hover input[type="radio"] ~ i.fa {
color: #78A025;
}

label input[type="checkbox"] ~ i.fa.fa-square-o{
    color: #c8c8c8;    display: inline;
}
label input[type="checkbox"] ~ i.fa.fa-check-square-o{
    display: none;
}
label input[type="checkbox"]:checked ~ i.fa.fa-square-o{
    display: none;
}
label input[type="checkbox"]:checked ~ i.fa.fa-check-square-o{
    color: #78A025;    display: inline;
}
label:hover input[type="checkbox"] ~ i.fa {
color: #78a025;
}

div[data-toggle="buttons"] label.active{
    color: #78a025;
}

label input[type="checkbox"]:checked ~ span {
    color: #78a025;
}

div[data-toggle="buttons"] label {
display: inline-block;
padding: 6px 12px;
margin-bottom: 0;
font-size: 14px;
font-weight: normal;
line-height: 2em;
text-align: left;
white-space: nowrap;
vertical-align: top;
cursor: pointer;
background-color: none;
border: 0px solid 
#c8c8c8;
border-radius: 3px;
color: #c8c8c8;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
-o-user-select: none;
user-select: none;
}

div[data-toggle="buttons"] label:hover {
color: #78A025;
}

div[data-toggle="buttons"] label:active, div[data-toggle="buttons"] label.active {
-webkit-box-shadow: none;
box-shadow: none;
}

<link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.min.css" rel="stylesheet">  

<div class="row">
    <div class="col-xs-12">
      <br> Vertical radio:
      <br>
      <div class="btn-group btn-group-vertical" data-toggle="buttons">
        <label class="btn">
          <input type="radio" name='gender1' checked><i class="fa fa-circle-o fa-2x"></i><i class="fa fa-dot-circle-o fa-2x"></i> <span>  Male</span>
        </label>
        <label class="btn">
          <input type="radio" name='gender1'><i class="fa fa-circle-o fa-2x"></i><i class="fa fa-dot-circle-o fa-2x"></i><span> Female</span>
        </label>
      </div>

    </div>
  </div>

  <div class="row">
    <div class="col-xs-12">
      <hr> Vertical checkbox:
      <br>
      <div class="btn-group btn-group-vertical" data-toggle="buttons">
        <label class="btn">
          <input type="checkbox" name='email1' checked><i class="fa fa-square-o fa-2x"></i><i class="fa fa-check-square-o fa-2x"></i> <span> Marketing Email</span>
        </label>
        <label class="btn">
          <input type="checkbox" name='email2'><i class="fa fa-square-o fa-2x"></i><i class="fa fa-check-square-o fa-2x"></i><span> Alert Email</span>
        </label>
        <label class="btn">
          <input type="checkbox" name='email3'><i class="fa fa-square-o fa-2x"></i><i class="fa fa-check-square-o fa-2x"></i><span> Account Email</span>
        </label>
      </div>


    </div>
  </div>

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