CSS 单选按钮滑块背景颜色

Question

您好，我正在尝试将 3 个单选按钮设置为一个滑块，一切正常，除了背景颜色不会改变。

我用这个例子来处理： https://jsfiddle.net/tx93cpnm/

@import url(http://fonts.googleapis.com/css?family=Source+Sans+Pro);
 * {
  margin: 0px;
  padding: 0px;
}
html {
  background: #497dd0;
}
.wrapper {
  margin: 100px 0;
}
.toggle_radio {
  position: relative;
  background: rgba(255, 255, 255, .1);
  margin: 4px auto;
  overflow: hidden;
  padding: 0 !important;
  -webkit-border-radius: 50px;
  -moz-border-radius: 50px;
  border-radius: 50px;
  position: relative;
  height: 26px;
  width: 318px;
}
.toggle_radio > * {
  float: left;
}
.toggle_radio input[type=radio] {
  display: none;
  /*position: fixed;*/
}
.toggle_radio label {
  font: 90%/1.618"Source Sans Pro";
  color: rgba(255, 255, 255, .9);
  z-index: 0;
  display: block;
  width: 100px;
  height: 20px;
  margin: 3px 3px;
  -webkit-border-radius: 50px;
  -moz-border-radius: 50px;
  border-radius: 50px;
  cursor: pointer;
  z-index: 1;
  /*background: rgba(0,0,0,.1);*/
  text-align: center;
  /*margin: 0 2px;*/
  /*background: blue;*/
  /*make it blue*/
}
.toggle_option_slider {
  /*display: none;*/
  /*background: red;*/
  width: 100px;
  height: 20px;
  position: absolute;
  top: 3px;
  -webkit-border-radius: 50px;
  -moz-border-radius: 50px;
  border-radius: 50px;
  -webkit-transition: all .4s ease;
  -moz-transition: all .4s ease;
  -o-transition: all .4s ease;
  -ms-transition: all .4s ease;
  transition: all .4s ease;
}
#first_toggle:checked ~ .toggle_option_slider {
  background: rgba(255, 255, 255, .3);
  left: 3px;
}
#second_toggle:checked ~ .toggle_option_slider {
  background: rgba(255, 255, 255, .3);
  left: 109px;
}
#third_toggle:checked ~ .toggle_option_slider {
  background: rgba(255, 255, 255, .3);
  left: 215px;
}

<div class="wrapper">
  <div class="toggle_radio">
    <input type="radio" class="toggle_option" id="first_toggle" name="toggle_option">
    <input type="radio" checked class="toggle_option" id="second_toggle" name="toggle_option">
    <input type="radio" class="toggle_option" id="third_toggle" name="toggle_option">
    <label for="first_toggle">
      <p>First Button</p>
    </label>
    <label for="second_toggle">
      <p>Second Button</p>
    </label>
    <label for="third_toggle">
      <p>Third Button</p>
    </label>
    <div class="toggle_option_slider">
    </div>
  </div>

然后把它变成这样： https://jsfiddle.net/9us6hs31/

@import url(http://fonts.googleapis.com/css?family=Source+Sans+Pro);
 * {
  margin: 0px;
  padding: 0px;
}
html {} .wrapper {
  margin: 100px 0;
}
.toggle_radio {
  position: relative;
  background-color: #ccc;
  margin: 4px auto;
  overflow: hidden;
  padding: 0 !important;
  -webkit-border-radius: 50px;
  -moz-border-radius: 50px;
  border-radius: 50px;
  position: relative;
  height: 20px;
  width: 60px;
}
.toggle_radio > * {
  float: left;
}
.toggle_radio input[type=radio] {
  display: none;
  /*position: fixed;*/
}
.toggle_radio label {
  font: 90%/1.618"Source Sans Pro";
  color: white;
  z-index: 0;
  display: block;
  width: 14px;
  height: 20px;
  margin: 3px 3px;
  -webkit-border-radius: 50px;
  -moz-border-radius: 50px;
  border-radius: 50px;
  cursor: pointer;
  z-index: 1;
  /*background: rgba(0,0,0,.1);*/
  text-align: center;
  /*margin: 0 2px;*/
  /*background: blue;*/
  /*make it blue*/
}
.toggle_option_slider {
  /*display: none;*/
  /*background: red;*/
  content: "";
  background-color: white;
  width: 14px;
  height: 14px;
  position: absolute;
  top: 3px;
  -webkit-border-radius: 50px;
  -moz-border-radius: 50px;
  border-radius: 50px;
  -webkit-transition: all .4s ease;
  -moz-transition: all .4s ease;
  -o-transition: all .4s ease;
  -ms-transition: all .4s ease;
  transition: all .4s ease;
}
#first_toggle:checked ~ .toggle_option_slider {
  background-color: #F32121;
  left: 4px;
}
#second_toggle:checked ~ .toggle_option_slider {
  background-color: white;
  left: 23px;
}
#third_toggle:checked ~ .toggle_option_slider {
  background-color: #21F321;
  left: 42px;
}
#first_toggle:checked ~ .toggle_radio {
  background: #F32121;
}
#second_toggle:checked ~ .toggle_radio {
  background: #ccc;
}
#third_toggle:checked ~ .toggle_radio {
  background: #21F321;
}

<div class="wrapper">
  <div class="toggle_radio">
    <input type="radio" class="toggle_option" id="first_toggle" name="toggle_option">
    <input type="radio" checked class="toggle_option" id="second_toggle" name="toggle_option">
    <input type="radio" class="toggle_option" id="third_toggle" name="toggle_option">
    <label for="first_toggle"></label>
    <label for="second_toggle"></label>
    <label for="third_toggle"></label>
    <div class="toggle_option_slider">
    </div>
  </div>

如您所见，我可以更改滑块的颜色，但不能更改框的颜色。

我周围有这个复选框滑块： https://jsfiddle.net/j1fw0rxv/

.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 20px;
}
.switch input {
  display: none;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 4px;
  bottom: 3px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}
input:checked + .slider {
  background-color: #2196F3;
}
input:focus + .slider {
  box-shadow: 0 0 1px #2196F3;
}
input:checked + .slider:before {
  -webkit-transform: translateX(18px);
  -ms-transform: translateX(18px);
  transform: translateX(18px);
}
/* Rounded sliders */

.slider.round {
  border-radius: 34px;
}
.slider.round:before {
  border-radius: 50%;
}

<div class="checkbox">
  <label class="switch">
    <input type="checkbox" value="" id="acheck">
    <div class="slider round"></div>
  </label>
</div>

所以我试着 fiddle 围绕那个...

这给了我这样的东西： https://jsfiddle.net/nd18fky6/

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 20px;
}
.switch input {
  display: none;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 23px;
  bottom: 3px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}
#first_toggle:checked + .slider {
  background-color: #F32121;
}
#first_toggle:checked + .slider:before {
  left: 4px;
}
#second_toggle:checked + .slider {
  background-color: #ccc;
}
#second_toggle:checked + .slider:before {
  left: 23px;
}
#third_toggle:checked + .slider {
  background-color: #21F321;
}
#third_toggle:checked + .slider:before {
  left: 42px;
}
/* Rounded sliders */

.slider.round {
  border-radius: 34px;
}
.slider.round:before {
  border-radius: 50%;
}

<div class="wrapper">
  <div class="switch">
    <label class="switch">
    </label>
    <label for="first_toggle">
      <input type="radio" id="first_toggle">
      <div class="slider round"></div>
    </label>
    <label for="second_toggle">
      <input type="radio" checked id="second_toggle">
      <div class="slider round"></div>
    </label>
    <label for="third_toggle">
      <input type="radio" id="third_toggle">
      <div class="slider round"></div>
    </label>
  </div>
</div>

所以我 fiddle 做了更多并将它们变成单独的滑块... https://jsfiddle.net/txz9ceur/

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 20px;
}
.switch input {
  display: none;
}
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: .4s;
  transition: .4s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 23px;
  bottom: 3px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}
#first_toggle:checked + .slider {
  background-color: #F32121;
}
#first_toggle:checked + .slider:before {
  left: 4px;
}
#second_toggle:checked + .slider {
  background-color: #ccc;
}
#second_toggle:checked + .slider:before {
  left: 23px;
}
#third_toggle:checked + .slider {
  background-color: #21F321;
}
#third_toggle:checked + .slider:before {
  left: 42px;
}
/* Rounded sliders */

.slider.round {
  border-radius: 34px;
}
.slider.round:before {
  border-radius: 50%;
}

<div class="wrapper">
  <div class="switch">


    <label class="switch" for="first_toggle">
      <input type="radio" id="first_toggle">
      <div class="slider round"></div>
    </label>
    <label class="switch" for="second_toggle">
      <input type="radio" checked id="second_toggle">
      <div class="slider round"></div>
    </label>
    <label class="switch" for="third_toggle">
      <input type="radio" id="third_toggle">
      <div class="slider round"></div>
    </label>

  </div>
</div>

好吧，颜色会按应有的方式改变，但我需要一个滑块。

我是什么missing/overlooking（我的猜测是因为方框是方框和选项之间的关系，但我可能是错的...）得到一个默认背景的滑块中间的起始位置是灰色，向左滑动是红色，向右滑动是绿色？

Answer 1

我玩过一点，但我想我已经记下了。主要问题是您试图用 CSS 影响 parent 的背景...但这是不可能的（目前）。

我使用定位和 z-index 在滑块 'track' 和伪元素中分层 'button/thumb' 和顶部的标签。

然后通过各种选择器对伪元素应用合适的定位似乎可以解决问题。

@import url(http://fonts.googleapis.com/css?family=Source+Sans+Pro);
 * {
  margin: 0px;
  padding: 0px;
}
.wrapper {
  margin: 100px 0;
  text-align: center;
}
.toggle_radio {
  position: relative;
  background-color: pink;
  margin: 4px auto;
  overflow: hidden;
  padding: 0 !important;
  -webkit-border-radius: 50px;
  -moz-border-radius: 50px;
  border-radius: 50px;
  position: relative;
  height: 28px;
  display: inline-block;
}
.toggle_radio input[type=radio] {
  display: none;
}
.toggle_radio label {
  font: 90%/1.618"Source Sans Pro";
  color: white;
  z-index: 0;
  display: inline-block;
  width: 24px;
  height: 24px;
  margin: 2px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 1;
  text-align: center;
  background: transparent;
  position: relative;
  z-index: 3;
}
.toggle_option_slider {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: #ccc;
  z-index: 1;
  transition: background .35s ease;
}
.toggle_option_slider::after {
  content: '';
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: white;
  position: absolute;
  top: 2px;
  z-index: 2;
  transition: left .15s ease;
}
#first_toggle:checked ~ .toggle_option_slider {
  background: red;
}
#first_toggle:checked ~ .toggle_option_slider::after {
  left: 2px;
}
#second_toggle:checked ~ .toggle_option_slider {
  background: #ccc;
}
#second_toggle:checked ~ .toggle_option_slider::after {
  left: calc((100% - 24px)/2);
}
#third_toggle:checked ~ .toggle_option_slider {
  background: green;
}
#third_toggle:checked ~ .toggle_option_slider::after {
  left: calc((100% - 24px) - 2px);
}

<div class="wrapper">
  <div class="toggle_radio">
    <input type="radio" class="toggle_option" id="first_toggle" name="toggle_option">
    <input type="radio" checked class="toggle_option" id="second_toggle" name="toggle_option">
    <input type="radio" class="toggle_option" id="third_toggle" name="toggle_option">
    <label for="first_toggle"></label>
    <label for="second_toggle"></label>
    <label for="third_toggle"></label>
    <div class="toggle_option_slider">
    </div>
  </div>

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