Vue.js 动态导航栏和内容区域

<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>

    <!-- 左侧导航栏 -->
    <view class='sidebar'>
      <view v-for='item in menuItems' :key='item.id' @click='selectMenuItem(item.id)'
        :class='{ active: activeMenuItem === item.id }'>
        {{ item.name }}
      </view>
    </view>

    <!-- 显示内容 -->
    <view class='content' v-if='activeMenuItem !== null'>
      <view v-for='feature in menuItems[activeMenuItem - 1].features' :key='feature.id'>
        <image :src='feature.icon' class='feature-icon' />
        <span>{{ feature.name }}</span>
      </view>
    </view>
  </view>
</template>

<script>
export default {
  data() {
    return {
      activeMenuItem: null, // 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: 'icon1.png' },
            { id: 2, name: '功能2', icon: 'icon2.png' }
          ]
        },
        {
          id: 2,
          name: '菜单项2',
          features: [
            { id: 3, name: '功能3', icon: 'icon3.png' },
            { id: 4, name: '功能4', icon: 'icon4.png' }
          ]
        },
        {
          id: 3,
          name: '菜单项3',
          features: [
            { id: 5, name: '功能5', icon: 'icon5.png' },
            { id: 6, name: '功能6', icon: 'icon6.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 {
  margin-left: 120px; /* 导航栏宽度加上间距 */
}

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