yikangyang-wx/component/Tabbar/Tabbar.vue

<template>
  <view class="tabbar" @touchmove.stop.prevent="() => {}">

    <view class="tabbar__content safe-area-inset-bottom">
      <view class="tabbar__content__item"
            v-for="item in pages"
            :class="{ 'tabbar__content__item-active': pageUrl === item.pagePath }"
            :key="item.pagePath"
            @tap.stop="clickHandler(item)">
        <view class="icon">
          <img class="active-bkg" src="/static/tabbar/active-bkg.svg" alt="">
          <img class="icon__inner" :src=" pageUrl === item.pagePath ? item.selectedMyIconPath : item.myIconPath" alt="" >
        </view>
        <text class="text">{{ item.text }}</text>
      </view>
    </view>
  </view>
</template>

<script>
import pages from '@/pages.json'
export default {
  data() {
    return {
      pageUrl: '',
      pages: []
    };
  },
  created() {
    this.pages = pages.tabBar.list
    uni.hideTabBar();
    // 获取引入了u-tabbar页面的路由地址，该地址没有路径前面的"/"
    let curPages = getCurrentPages();
    // 页面栈中的最后一个即为项为当前页面，route属性为页面路径
    this.pageUrl = curPages[curPages.length - 1].route;
  },
  methods: {
    clickHandler (item) {
      uni.switchTab({
        url: '/' + item.pagePath
      })
    }
  },
}
</script>

<style lang="scss">
.tabbar {

  &__content {
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    background: #fff;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 998;
    /* #ifndef APP-NVUE */
    box-sizing: content-box;
    /* #endif */

    &__item {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      padding-bottom: 12rpx;

      .icon {
        width: 40rpx;
        height: 40rpx;
        // overflow: hidden;
        z-index: 2;
        position: relative;

        .active-bkg {
          display: none;
          position: absolute;
          top: 0;
          left: 0;
        }

        &__inner {
          width: 40rpx;
          height: 40rpx;
          border-bottom: 40rpx solid transparent;
          transform: translateZ(0);
          // filter: drop-shadow(0 80rpx 0 #333);
        }
      }
      .text {
        font-size: 24rpx;
        color: #333;
        margin-top: 12rpx;
      }

      &-active {
        filter: drop-shadow(0 0 4rpx #fff);

        .icon {
          $activeSize: 94rpx;
          width: $activeSize;
          height: $activeSize;
          .active-bkg {
            display: inherit;
            width: $activeSize;
            height: $activeSize;
          }

          &__inner {
            $activeIcon: 50rpx;
            width: $activeIcon;
            height: $activeIcon;
            transform: translateX(calc((#{$activeSize} - #{$activeIcon}) / 2)) translateY(calc((#{$activeSize} - #{$activeIcon}) / 2)) translateZ(0);
            // filter: drop-shadow(calc((#{$activeSize} - #{$activeIcon}) / 2) calc((#{$activeSize} - #{$activeIcon}) / 2) 0 #fff);
            // filter: drop-shadow(calc((#{$activeSize} - #{$activeIcon}) / 2) calc((#{$activeSize} - #{$activeIcon}) / 2 + 80rpx) 0 #fff);
          }
        }
        .text {
          color: #d05b58;
        }
      }
    }
  }
}
</style>