微信小程序左右联动菜单（即可左联动，也可右联动）

<!-- 搜索 -->

<view class="search">

<input class="search-box" placeholder='痘研商城' bindtap='goodsName'></input>

<image src="{{staticImg}}index/iconSearch.png" class='question-mark'></image>

</view>

<!-- 左侧导航 -->

<view class='tui-fixed-left'>

<scroll-view class='tui-city-scroll' scroll-x="true" scroll-y="true" style='height:92%;' scroll-with-animation="true" scroll-top="{{leftMenuTop}}">

<text class="menu-item {{index === currentActiveIndex ? 'menu-active' : ''}}" wx:for="{{navList}}" wx:key="unique" data-index="{{index}}" id='{{index}}' catchtap='changeMenu'>{{item.c_name}}</text>

</scroll-view>

</view>

<!-- 右侧滚动商品 -->

<view class='content'>

<scroll-view class='tui-city-scroll-y' scroll-y="true" style='height:92%;' scroll-with-animation="true" scroll-top="{{rightProTop}}" bindscroll="scroll">

<view class='pro-item' wx:for="{{navList}}" wx:key="unique">

<view class='tui-list-head' id='NAV{{index}}'>{{item.c_name}}</view>

<view class='tui-list-li'>

<view class='goods-box' wx:for-item='items' wx:for="{{item.list}}" wx:key="unique" >

<image class='goodsImg' src='{{items.url}}'></image>

<view class='goodsName'>{{items.goodsName}}</view>

</view>

</view>

</view>

</scroll-view>

</view>

.wxss

page{
font-family: "微软雅黑";
background-color:#f0f0f0;
}
.search{
100%;
height:88rpx;
background-color:#5196ff;
box-sizing: border-box;
padding-top:18rpx;
position: fixed;
left: 0;
top: 0;
}
.search-box{
690rpx;
height:57rpx;
margin-left:30rpx;
background-color:#fff;
box-sizing: border-box;
padding-left: 60rpx;
border-radius: 57rpx;
font-size: 26rpx;
}
.question-mark{
30rpx;
height:30rpx;
position: absolute;
left:45rpx;
top:30rpx;
}
.tui-fixed-x{
/* margin-left: 130px; */
position: fixed;
top: 89rpx;
left: 0;
}
.tui-fixed-left{
 180rpx;
height: 100%;
border-right: 1px solid #dfdfdf;
position: fixed;
background-color:#f5f5f5;
top: 89rpx;
left: 0;
}
.tui-list-head{
height:65rpx;
line-height: 65rpx;
}
.tui-city-scroll{
 100%;
}
.menu-item{
font-size: 26rpx;
box-sizing: border-box;
height: 100rpx;
line-height: 100rpx;
 180rpx;
background-color:#fff;
display: block;
border-bottom: 1px solid #dfdfdf;
position: relative;
z-index: 10;
text-align: center;
}
.menu-active{
border-left:10rpx solid #5196ff;
background-color:#f0f0f0;
}
.content{
570rpx;
box-sizing: border-box;
padding-left: 20rpx;
padding-right: 20rpx;
height: 100%;
position: fixed;
top: 89rpx;
right: 0;
}
.tui-city-scroll-y{
height: 100%;
box-sizing: border-box;
}
.tui-list-head{
height: 65rpx;
line-height: 65rpx;
font-size: 28rpx;
font-weight: 700;
}
.tui-list-li{
background-color:#fff;
/* height: 400px; */
overflow: hidden;
color: #fff;
font-size: 50rpx;
box-sizing: border-box;
padding:20rpx 0 0 0;
}
.goods-box{
170rpx;
/* height: 100rpx;
background: #c00; */
overflow: hidden;
margin-right:10rpx;
/* margin-bottom: 10rpx; */
float:left;
}
.tui-list-li .goods-box:nth-child(3n){
margin-right:0rpx;
}
.goodsImg{
display: block;
100rpx;
height: 100rpx;
margin:0 auto;
margin-bottom: 15rpx;
}
.goodsName{
100%;
overflow: hidden;
box-sizing: border-box;
height: 42rpx;
line-height: 42rpx;
text-align: center;
font-size: 24rpx;
text-overflow: ellipsis;
white-space: nowrap;
color: #333;
margin-bottom: 20rpx;
}

.js

var app = getApp();
//声明全局变量
let proListToTop = [], menuToTop = [], MENU = 0, windowHeight, timeoutId;
// MENU ==> 是否为点击左侧进行滚动的，如果是，则不需要再次设置左侧的激活状态
Page({


  data: {
    staticImg: app.globalData.staticImg,
    currentActiveIndex: 0,
    // 接口返回的商品数组
    navList:[
      {
        c_id: "01",
        c_name:'电脑办公',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "02",
        c_name: '祛痘',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "02",
        c_name: '化妆品',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "03",
        c_name: '口红',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "04",
        c_name: '包包',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "05",
        c_name: '面膜',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "06",
        c_name: '精华乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "07",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "08",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "09",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "10",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "11",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "12",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "13",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "14",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "07",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
      {
        c_id: "07",
        c_name: '洁面乳',
        list: [
          {
            id: 1,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 2,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 3,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 4,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
          {
            id: 5,
            url: 'https://resource.yirenheju.cn/wechat/index/err.png',
            goodsName: '玩具',
          },
        ]
      },
    ],






  },
  onLoad: function (e) {






    // 确保页面数据已经刷新完毕~
    setTimeout(() => {
      this.getAllRects()
    }, 20)





  },
 
  changeMenu(e) {
    console.log(proListToTop);
    // 改变左侧tab栏操作
    if (Number(e.target.id) === this.data.currentActiveIndex) return
    MENU = 1
    this.setData({
      currentActiveIndex: Number(e.target.id),
      rightProTop: proListToTop[Number(e.target.id)]
    })
    this.setMenuAnimation(Number(e.target.id))
  },
  scroll(e) {
    console.log(e);
    for (let i = 0; i < proListToTop.length; i++) {
      if (e.detail.scrollTop < proListToTop[i] && i !== 0 && e.detail.scrollTop > proListToTop[i - 1]) {
        return this.setDis(i)
      }
    }
    // 找不到匹配项，默认显示第一个数据
    if (!MENU) {
      this.setData({
        currentActiveIndex: 0
      })
    }
    MENU = 0
  },
  setDis(i) {
    // 设置左侧menu栏的选中状态
    if (i !== this.data.currentActiveIndex + 1 && !MENU) {
      this.setData({
        currentActiveIndex: i - 1
      })
    }
    MENU = 0
    this.setMenuAnimation(i)
  },
  setMenuAnimation(i) {
    // 设置动画，使menu滚动到指定位置。
    let self = this
    console.log(33)
    if (menuToTop[i].animate) {
      console.log(11111)
      // 节流操作
      if (timeoutId) {
        clearTimeout(timeoutId)
      }
      timeoutId = setTimeout(() => {
        console.log(12138)
        self.setData({
          leftMenuTop: (menuToTop[i].top - windowHeight )
        })
      }, 50)
    } else {
      console.log(11)
      if (this.data.leftMenuTop === 0) return
      console.log(22)
      this.setData({
        leftMenuTop: 0
      })
    }
  },
  getActiveReacts() {
    wx.createSelectorQuery().selectAll('.menu-active').boundingClientRect(function (rects) {
      return rects[0].top
    }).exec()
  },
  getAllRects() {





    // 获取商品数组的位置信息
    wx.createSelectorQuery().selectAll('.pro-item').boundingClientRect(function (rects) {
      rects.forEach(function (rect) {
        console.log(rect)
        // 这里减去44是根据你的滚动区域距离头部的高度，如果没有高度，可以将其删去
        proListToTop.push(rect.top - 44)
      })
    }).exec()





    // 获取menu数组的位置信息
    wx.createSelectorQuery().selectAll('.menu-item').boundingClientRect(function (rects) {
      wx.getSystemInfo({
        success: function (res) {
          console.log(res);
          windowHeight = res.windowHeight  / 2 
          // console.log(windowHeight)
          rects.forEach(function (rect) {
            menuToTop.push({
              top: rect.top,
              animate: rect.top > windowHeight
            })
          })
        }
      })
    }).exec()
  },
  // 获取系统的高度信息
  getSystemInfo() {
    let self = this
    wx.getSystemInfo({
      success: function (res) {
        windowHeight = res.windowHeight / 2
      }
    })
  }
 
})