小程序实现瀑布流动态加载列表

let leftHeight = 0,
  rightHeight = 0; //分别定义左右两边的高度
let query;
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    goodsList: {
      type: Array,
      value: []
    },
    loadingShow: {
      type: Boolean,
      value: false
    },
    noInfoShow: {
      type: Boolean,
      value: false
    }
  },

  /**
   * 组件的初始数据
   */
  data: {
    leftList: [],
    rightList: []
  },
  observers: {
  // 当goodsList发生变化时调用方法
    'goodsList': function (goodsList) {
      this.isLeft()
    }
  },
  /**
   * 组件的方法列表
   */
  methods: {
    async isLeft() {
      const {
        goodsList,
        leftList,
        rightList
      } = this.data;
      query = wx.createSelectorQuery().in(this);
      let list = goodsList.slice(leftList.length+rightList.length,goodsList.length)
      for (const item of list) {
        leftHeight <= rightHeight ? leftList.push(item) : rightList.push(item); //判断两边高度，来觉得添加到那边
        await this.getBoxHeight(leftList, rightList);
      }
      
    },
    getBoxHeight(leftList, rightList) { //获取左右两边高度
      return new Promise((resolve, reject) => {
        this.setData({
          leftList,
          rightList
        }, () => {
          query.select('#left').boundingClientRect();
          query.select('#right').boundingClientRect();
          
          query.exec((res) => {
            leftHeight = res[0].height; //获取左边列表的高度
            rightHeight = res[1].height; //获取右边列表的高度
            resolve();
          });
        });
      })
    },
  }
})

// wxml
<view class="box clearfix">
  <view id="left" class="left">
    <view class="shop_box" wx:for="{{leftList}}" wx:key="index" ></view>
  </view>
  <view id="right" class="right">
    <view class="shop_box" wx:for="{{rightList}}" wx:key="index" ></view>
  </view>
</view>
<view class="cu-load  loading" wx:if="{{loadingShow}}"></view>
<view class="cu-load  over" wx:if="{{noInfoShow}}"></view>

.left,.right{
  float: left;
}
.clearfix::after {
  content: ".";
  clear: both;
  display: block;
  overflow: hidden;
  font-size: 0;
  height: 0;
}
.clearfix {
  zoom: 1;
}

<goodsBox id="goodsBox" goodsList="{{goodsList}}" loadingShow="{{loadingShow}}" noInfoShow="{{noInfoShow}}"></goodsBox>