带有无序列表的浮动按钮

Question

我有一个3部分的问题。

1. 如何在悬停时将无序列表（Google和Facebook图标）从右到左与父列表项对齐。 （目前当父列表项悬停时，Google和Facebook图标始终与第一个列表项对齐）

2. 如何将Facebook和Google图标置于中间位置。

3. 当鼠标移动到Facebook或Google图标时，原始无序列表会消失。我该如何解决这个问题。

以下代码段：

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* {
  padding: 0;
  margin: 0;
}

.label-container {
  position: fixed;
  bottom: 48px;
  right: 105px;
  display: table;
  visibility: hidden;
}

.label-text {
  color: #FFF;
  background: rgba(51, 51, 51, 0.5);
  display: table-cell;
  vertical-align: middle;
  padding: 10px;
  border-radius: 3px;
}

.label-arrow {
  display: table-cell;
  vertical-align: middle;
  color: #333;
  opacity: 0.5;
}

.float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 40px;
  right: 40px;
  background-color: #F33;
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  box-shadow: 2px 2px 3px #999;
  z-index: 1000;
  animation: bot-to-top 2s ease-out;
}

.ul {
  position: fixed;
  right: 40px;
  padding-bottom: 20px;
  bottom: 80px;
  z-index: 100;
}

.ul1 {
  position: fixed;
  right: 80px;
  padding-bottom: 20px;
  bottom: 80px;
  z-index: 100;
}

.ul .li {
  list-style: none;
  margin-bottom: 10px;
}

.ul1 .li1 {
  list-style: none;
  margin-bottom: 20px;
  display: inline-block;
}

.ul .li a img {
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  box-shadow: 2px 2px 3px #999;
  width: 30px;
  height: 30px;
  display: block;
}

.ul1 .li1 a {
  background-color: #F33;
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  box-shadow: 2px 2px 3px #999;
  width: 30px;
  height: 30px;
  display: block;
  
}

.ul:hover, .ul1:hover {
  visibility: visible!important;
  opacity: 1!important;
}

 

.my-float {
  font-size: 24px;
  margin-top: 18px;
}

a.menu-share+.ul, a.menu-share1+.ul1 {
  visibility: hidden;
}


a.menu-share:hover+.ul, a.menu-share1:hover+.ul1 {
  visibility: visible;
  animation: scale-in 0.5s;
}

a.menu-share i {
  animation: rotate-in 0.5s;
}

a.menu-share:hover>i {
  animation: rotate-out 0.5s;
}

@keyframes bot-to-top {
  0% {
    bottom: -40px
  }
  50% {
    bottom: 40px
  }
}

@keyframes scale-in {
  from {
    transform: scale(0);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes rotate-in {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes rotate-out {
  from {
    transform: rotate(360deg);
  }
  to {
    transform: rotate(0deg);
  }
}
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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.5.0/css/font-awesome.min.css">
<a href="#" class="float menu-share">
  <i class="fa fa-envelope-o my-float"></i>
</a>
<ul class="ul">
  <li class="li">
    <a href="#" class="menu-share1">
      <img src="https://www.codeproject.com/KB/GDI-plus/ImageProcessing2/flip.jpg" class="my-float" />
    </a>

    <ul class="ul1">
      <li class="li1">
        <a href="#">
          <i class="fa fa-google-plus my-float"></i>
        </a>
      </li>
      <li class="li1">
        <a href="#">
          <i class="fa fa-facebook my-float"></i>
        </a>
      </li>
    </ul>
  </li>
  <li class="li">
    <a href="#" class="menu-share1">
      <img src="http://mblogthumb1.phinf.naver.net/20121009_136/dogtalk__1349752474508pRuyE_JPEG/Puppy-Love-29817_large.jpg?type=w2" class="my-float" />
    </a>
    <ul class="ul1">
      <li class="li1">
        <a href="#">
          <i class="fa fa-google-plus my-float"></i>
        </a>
      </li>
      <li class="li1">
        <a href="#">
          <i class="fa fa-facebook my-float"></i>
        </a>
      </li>
    </ul>
  </li>
</ul>
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Answer 1

试一下。我重写了一下代码。关于文本元素居中的主要思想是指定line-height等于元素的高度，但不应该有任何填充。

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* {
  padding: 0;
  margin: 0;
}

.label-container {
  position: fixed;
  bottom: 48px;
  right: 105px;
  display: table;
  visibility: hidden;
}

.label-text {
  color: #FFF;
  background: rgba(51, 51, 51, 0.5);
  display: table-cell;
  vertical-align: middle;
  padding: 10px;
  border-radius: 3px;
}

.label-arrow {
  display: table-cell;
  vertical-align: middle;
  color: #333;
  opacity: 0.5;
}

.float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 40px;
  right: 40px;
  background-color: #F33;
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  line-height: 60px;
  box-shadow: 2px 2px 3px #999;
  z-index: 1000;
  animation: bot-to-top 2s ease-out;
}

.ul {
  position: fixed;
  right: 40px;
  padding-bottom: 20px;
  bottom: 80px;
  z-index: 100;
}

.ul1, .ul2 {
  position: fixed;
  right: 60px;
  padding-bottom: 20px;
  z-index: 100;
  padding-right: 20px;
}

.ul1 {
  bottom: 80px;
}

.ul2 {
  bottom: 120px;
}

.ul .li {
  list-style: none;
  margin-bottom: 10px;
}

.ul1 .li1 {
  list-style: none;
  line-height: 30px;
  display: inline-block;
  margin-bottom: 10px;
}

.ul .li a img {
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  box-shadow: 2px 2px 3px #999;
  width: 30px;
  height: 30px;
  display: block;
}

.ul1 .li1 a {
  background-color: #F33;
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  box-shadow: 2px 2px 3px #999;
  width: 30px;
  height: 30px;
  display: block;
}

.ul:hover, .ul1:hover {
  visibility: visible!important;
  opacity: 1!important;
}

a.menu-share+.ul, a.menu-share1+.ul1 {
  visibility: hidden;
}


a.menu-share:hover+.ul, a.menu-share1:hover+.ul1 {
  visibility: visible;
  animation: scale-in 0.5s;
}

a.menu-share i {
  animation: rotate-in 0.5s;
}

a.menu-share:hover>i {
  animation: rotate-out 0.5s;
}

@keyframes bot-to-top {
  0% {
    bottom: -40px
  }
  50% {
    bottom: 40px
  }
}

@keyframes scale-in {
  from {
    transform: scale(0);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes rotate-in {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes rotate-out {
  from {
    transform: rotate(360deg);
  }
  to {
    transform: rotate(0deg);
  }
}

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<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.5.0/css/font-awesome.min.css">
<a href="#" class="float menu-share">
  <i class="fa fa-envelope-o my-float"></i>
</a>
<ul class="ul">
  <li class="li">
    <a href="#" class="menu-share1">
      <img src="https://www.codeproject.com/KB/GDI-plus/ImageProcessing2/flip.jpg" class="my-float" />
    </a>

    <ul class="ul1 ul2">
      <li class="li1">
        <a href="#">
          <i class="fa fa-google-plus my-float"></i>
        </a>
      </li>
      <li class="li1">
        <a href="#">
          <i class="fa fa-facebook my-float"></i>
        </a>
      </li>
    </ul>
  </li>
  <li class="li">
    <a href="#" class="menu-share1">
      <img src="http://mblogthumb1.phinf.naver.net/20121009_136/dogtalk__1349752474508pRuyE_JPEG/Puppy-Love-29817_large.jpg?type=w2" class="my-float" />
    </a>
    <ul class="ul1">
      <li class="li1">
        <a href="#">
          <i class="fa fa-google-plus my-float"></i>
        </a>
      </li>
      <li class="li1">
        <a href="#">
          <i class="fa fa-facebook my-float"></i>
        </a>
      </li>
    </ul>
  </li>
</ul>

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