小程序開發(fā)中怎么樣實(shí)現(xiàn)一個(gè)分頁(yè)加載功能

/**
   * @todo 獲取訂單列表
   * @return mixed
   */
  public function getOrderList(){
    $field = ['id','order_no','name','created_at','desc','order_status','pay_status'];
    $orders = Order::where('uid',$this->user->id)->orderBy('created_at', 'desc')->paginate(5, $field);
    return $orders;
}

const util = require('../../utils/util.js');
Page({
 /**
 * 頁(yè)面的初始數(shù)據(jù)
 */
 data: {
  // 前臺(tái)顯示list
  showlist: [],
  // 初始化page
  page: 2,
  height:600,
 },
 onLoad: function (options) {
  var self = this;
  // 請(qǐng)求后臺(tái) 
  util.ajax('order/get' , '', 'GET', res => {
    self.setData({
     showlist: res.data,
    })
  })
 },
 /**
 * 頁(yè)面上拉觸底事件的處理函數(shù)
 */
 upcroll: function (e) {
  var self = this;
  var page = self.data.page++;
  // 請(qǐng)求后臺(tái)，獲取下一頁(yè)的數(shù)據(jù)。
  util.ajax('order/get?page=' + page, '', 'GET', res => {
   self.setData({
    //向頁(yè)面已有數(shù)據(jù)后面加數(shù)據(jù)
    showlist: self.data.showlist.concat(res.data),
   })
   if (res.data=='') {
    wx.showToast({
     title: '沒(méi)有更多數(shù)據(jù)',
    })
   }
  })
 }
})

<view class='warp'>
<view class='container' >
 <scroll-view scroll-y='true'  bindscrolltolower="upcroll" lower-threshold="20" >
  <view class='alllist' wx:for="{{showlist}}" wx:for-item="j" wx:key="key" name="info_border">
  <view class='list'>
  <view class='img'>
   <image src='../../imges/imgicon/icon2.png' class='img'></image>
   <view class='text'>{{j.name}}</view>
  </view>
  <view class='message'>
   <view class='te'><text class='text'>日期：</text><text class='text cor'>{{j.created_at}}</text></view>
   <view class='te text on'><text class='text'>描述：</text>{{j.desc}}</view>
  </view>
  </view>
  <view class='text statsin'>
  <view class='a left'>
  <navigator url='#' class='waiting' >待接單</navigator>
  </view>
  <view class='a'>
  <navigator url='#' class='okorder'>已完成</navigator>
  </view>
  </view>
 </view>
 </scroll-view>
 </view> 
</view>