功能导航栏：菜单项与功能列表的联动展示

<template>
  <view>
    <!-- 顶部导航栏 -->
    <view class='af-head'>
      <span class='af-head-msg' style='font-size: 60rpx;'>&lt;</span>
      <span class='af-head-msg af-head-fuc'>全部功能</span>
    </view>
<pre><code>&lt;!-- 左侧导航栏 --&gt;
&lt;view class='sidebar'&gt;
  &lt;view v-for='item in menuItems' :key='item.id' @click='selectMenuItem(item.id)'
    :class='{ active: activeMenuItem === item.id }'&gt;
    {{ item.name }}
  &lt;/view&gt;
&lt;/view&gt;

&lt;!-- 显示内容 --&gt;
&lt;view class='content'&gt;
  &lt;view v-if='activeMenuItem !== null'&gt;
    &lt;view v-for='feature in menuItems[activeMenuItem - 1].features' :key='feature.id'&gt;
      &lt;image :src='feature.icon' class='feature-icon' /&gt;
      &lt;span&gt;{{ feature.name }}&lt;/span&gt;
    &lt;/view&gt;
  &lt;/view&gt;
&lt;/view&gt;
</code></pre>
  </view>
</template>
<script>
export default {
  data() {
    return {
      activeMenuItem: 1, // 当前选中的菜单项ID
      menuItems: [
        {
          id: 1,
          name: '菜单项1',
          features: [
            { id: 1, name: '功能1', icon: '/static/home/128/duanxin.png' },
            { id: 2, name: '功能2', icon: '/static/home/128/duanxin.png' }
          ]
        },
        {
          id: 2,
          name: '菜单项2',
          features: [
            { id: 3, name: '功能3', icon: '/static/home/128/duanxin.png' },
            { id: 4, name: '功能4', icon: '/static/home/128/duanxin.png' }
          ]
        },
        {
          id: 3,
          name: '菜单项3',
          features: [
            { id: 5, name: '功能5', icon: '/static/home/128/duanxin.png' },
            { id: 6, name: '功能6', icon: '/static/home/128/duanxin.png' }
          ]
        }
      ]
    };
  },
  methods: {
    selectMenuItem(itemID) {
      this.activeMenuItem = itemID;
    }
  }
};
</script>
<style>
.af-head {
  position: relative;
  background-color: #629ffc;
  height: 100rpx;
  display: flex;
  justify-content: center;
  font-size: 44rpx;
  font-weight: 500;
  font-family: sans-serif;
}

.af-head-msg {
  position: absolute;
  bottom: 16rpx;
  color: white;
  left: 38rpx;
}

.af-head-fuc {
  text-align: center;
  left: 300rpx;
}

.sidebar {
  width: 100px;
  height: 100vh;
  padding-top: 20rpx;
}

.sidebar view {
  padding: 10rpx;
  color: black;
  list-style-type: none;
  display: block;
  margin-top: 10px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.sidebar view.active {
  border-left: 4px solid #629ffc;
  background-color: white;
}

.content {
  padding: 20px;
}

.feature-icon {
  width: 20px;
  height: 20px;
  margin-right: 5px;
}
</style>