云台八方向操作页面

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基于https://blog.youkuaiyun.com/zhangtff/article/details/89458797的文章，不使用图片绘制简易云台操作面板。

1.html片段

代码如下（示例）：

<div class="pie">
            <div class="slice-one slice">
              <div class="dv"><div class="sj"></div></div>
            </div>
            <div class="slice-two slice">
              <div class="dv"><div class="sj"></div></div>
            </div>
            <div class="slice-three slice">
              <div class="dv"><div class="sj"></div></div>
            </div>
            <div class="slice-four slice">
              <div class="dv"><div class="sj"></div></div>
            </div>
            <div class="slice-five slice">
              <div class="dv"><div class="sj"></div></div>
            </div>
            <div class="slice-six slice">
              <div class="dv"><div class="sj"></div></div>
            </div>
            <div class="slice-seven slice">
              <div class="dv"><div class="sj"></div></div>
            </div>
            <div class="slice-eight slice">
              <div class="dv"><div class="sj"></div></div>
            </div>
            <div class="center"></div>
          </div>

2.css片段

代码如下（示例）：

.pie {
  transform: scale3d(1.22, 1.22, 1.22);
  position: relative;
  margin: 20px auto;
  padding: 0;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  list-style: none;
  overflow: hidden;
  /* background: url('../../assets/images/blue.png') no-repeat center center / 100% 100%; */
  .center {
    position: absolute;
    width: 100px;
    height: 100px;
    top: 50px;
    left: 50px;
    border-radius: 50%;
    background-color: white;
    &::after {
      content: "";
      position: absolute;
      width: 50px;
      height: 50px;
      top: 25px;
      left: 25px;
      border-radius: 50%;
      background-color: #f1f5fd;
    }
  }
  .slice {
    background-color: #f1f5fd;
    overflow: hidden;
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 50%;
    transform-origin: 0% 100%;
    border-left: 3px solid white;
    &:active {
      background-color: #268cf2;
      .dv .sj {
        border-bottom: 10px solid white;
      }
    }
    // border-bottom: 5px solid white;
    .dv {
      transform: skewY(45deg) rotate(22.5deg);
      margin-top: 105px;
      margin-left: 15px;
      .sj {
        position: fixed;
        bottom: 0;
        width: 0;
        height: 0;
        border-top: 10px solid transparent;
        border-right: 10px solid transparent;
        border-bottom: 10px solid #268cf2;
        border-left: 10px solid transparent;
      }
    }
    &.slice-one {
      transform: rotate(-22.5deg) skewY(-45deg);
    }
    &.slice-two {
      transform: rotate(22.5deg) skewY(-45deg);
    }
    &.slice-three {
      transform: rotate(67.5deg) skewY(-45deg);
    }
    &.slice-four {
      transform: rotate(112.5deg) skewY(-45deg);
    }
    &.slice-five {
      transform: rotate(157.5deg) skewY(-45deg);
    }
    &.slice-six {
      transform: rotate(202.5deg) skewY(-45deg);
    }
    &.slice-seven {
      transform: rotate(247.5deg) skewY(-45deg);
    }
    &.slice-eight {
      transform: rotate(292.5deg) skewY(-45deg);
    }
  }
}