微信小程序实现下拉加载更多商品

<view class='goods'>
 <view class='good' wx:for="{{ goodslist }}" wx:key='index'>
 <view class='pic'>
 <image src='{{ item.imgUrl }}'></image>
 </view>
 <view class='title'> {{ item.des }} </view>
 <view class='desc'>
 <text class='price'>￥{{ item.price }}</text>
 <text class='paynum'> {{ item.alreadyPaid }} </text>
 </view>
 </view>
</view>

<button loading wx:if="{{loadmore}}"> loading... </button>
<button wx:else> 我是有底线的 </button>

/* pages/loadmore/loadmore.wxss */

.goods{
 display: flex;
 justify-content: space-between;
 flex-wrap: wrap;
 margin-top: 20rpx;
 background-color: #ddd;
}
.good{
 width: 370rpx;
 height: 528rpx;
 /* background-color: red; */
 margin-bottom: 20rpx;
}

.pic{
 width: 370rpx;
 height: 370rpx;
}
.pic image{
 width: 100%;
 height: 100%;
}

.title{
 font-size: 26rpx;
 padding: 20rpx;
 height: 52rpx;
 overflow: hidden;
}
.desc{
 font-size: 23rpx;
 padding: 20rpx;
}
.paynum{
 margin-left: 165rpx;
}

// pages/loadmore/loadmore.js
Page({

 /**
 * 页面的初始数据
 */
 data: {
 data: [], // 所有数据
 goodslist:[], // 展示数据
 loadmore: true
 },

 /**
 * 生命周期函数--监听页面加载
 */
 onLoad: function (options) {
 const that = this;
 wx.request({
 url: 'http://www.tanzhouweb.com/vueProject/vue.php?title=likeYou',
 success(res){
  const data = res.data;
  const goodslist = [];
  // 初始显示6条数据
  data.forEach((item, index) => {
  if(index<6){
  goodslist.push(item)
  }
  });
  // console.log(data)
  that.setData({
  goodslist,
  data
  })
 }
 })
 },

 // 下拉触底执行（下拉触底添加后6条数据，直到所有数据加载完成）
 onReachBottom(e){
 const {data, goodslist} = this.data;
 const start = goodslist.length;
 const end = Math.min( start + 6, data.length - 1);
 if(goodslist.length == data.length){
 this.setData({
  loadmore:false
 })
 return ;
 }
 for(let i = start; i<=end; i++){
 goodslist.push(data[i])
 }
 this.setData({
 goodslist
 })
 }
})

{
 "usingComponents": {},
 "navigationBarBackgroundColor": "#3366CC",
 "navigationBarTitleText": "商品加载",
 "navigationBarTextStyle": "white"
}