1、原始方法，每请求一页都拿到之前的数据concat一下后整体再setData

loadData() {
  let that = this
  let data = {}
  data.page = this.data.page
  data.size = this.data.size
  findAll(data).then(res => {
    if (res.data.code === 1) {
      this.setData({
        dataList: this.data.dataList.concat(res.data.data.content)
      })
    } else {
      wx.showToast({
        title: res.data.msg,
        icon: 'none'
      })
    }
  })
}

2、改进方法，每请求一页都只setData当前页的数据

loadData() {
  let that = this
  let data = {}
  data.page = this.data.page
  data.size = this.data.size
  findAll(data).then(res => {
    if (res.data.code === 1) {
      let index = this.data.page - 1
      this.setData({
        ['dataList[' + index + ']']: res.data.data.content
      })
    } else {
      wx.showToast({
        title: res.data.msg,
        icon: 'none'
      })
    }
  })
}

3、结合scroll-view请求列表做分页的具体实现

模板中使用二维数组展示数据

<scroll-view scroll-y lower-threshold="100" style="height: calc(100vh - 480rpx)" bindscrolltolower="scrollToLower">
    <view wx:for="{{dataList}}" wx:for-item="list" wx:key="index">
      <view class="dataList" wx:for="{{list}}" wx:key="index">
        <view>{{item.name}}</view>
        <view>{{item.phone}}</view>
      </view>
    </view>
  </scroll-view>

data: {
  isPage:false, // 还有下一页
  loading: false, // 正在加载
  page: 1,
  size: 10
}

loadData() {
  let that = this
  let data = {}
  data.page = this.data.page
  data.size = this.data.size
  findAll(data).then(res => {
    if (res.data.code === 1) {
      let index = this.data.page - 1
      this.setData({
        ['dataList[' + index + ']']: res.data.data.content,
        loading: false
      })
      if(this.data.page >= res.data.data.totalPages) { // 当前页大于等于数据的总页数则无下一页
         this.setData({isPage: false,page:1})
       } else { // 有下一页
         this.setData({isPage:true})
       }
    } else {
      wx.showToast({
        title: res.data.msg,
        icon: 'none'
      })
    }
  })
},

//滑动触底 
scrollToLower: function (event) {
  console.log('到达底部');
  if (this.data.isPage && !this.data.loading) { // 有下一页并且上一页的数据处理完成则请求下一页的数据
    this.setData({
      page: this.data.page + 1,
      loading: true
    })
    this.loadData();
  }
}