微信小程序 - （下拉）加载更多数据

注意和后端配合就行了，前端也只能把数据拼接起来！

无论是下拉加载还是加载更多，一样的道理！

注意首次加载传递参数

注意每次加载数据数

wxml

<view class='table-rank'>
  <view class='tables center' wx:for="{{ranklist}}" wx:for-index="idx" wx:key="prototype">
    <view class='stage-rank'>
      {{idx+1}}
    </view>
    <view class='name'>{{item.name}}</view>
    <view class='price'>{{item.count}}</view>
  </view>
</view>
 
<view class='more'>
  <button loading="{{loading}}" disabled="{{disabled}}" catchtap="setLoading">{{loadText}}</button>
</view>

var app = getApp().globalData;
 
Page({
  data: {
    loadText: '加载更多',
    ranklist: [],
    count: 1
  },
 
 
  onLoad: function(res) {
    // 首次加载：传参数num:0
    let num = 0;
    let _page = this;
    let uid = wx.getStorageSync('uinfo').uid;
 
 
    wx.request({
      url: 'url',
      data: {
        uid,
        num
      },
      header: {
        'content-type': 'application/json'
      },
      method: 'GET',
      dataType: 'json',
      responseType: 'text',
      success(res) {
        _page.setData({
          ranklist: res.data.all_list,
          me: res.data.me
        });
      }
    })
  },
 
  //点击 加载更多 按钮
  setLoading(e) {
 
    let _this = this;
    let _page = this;
 
    // 暂存数据
    let ranklistBefore = _this.data.ranklist;
 
    let uid = wx.getStorageSync('uinfo').uid;
 
    // 每次加载数据条数(10)
    let num = _this.data.count++ * 10;
 
    wx.request({
      url: app.api.simulation_ranking,
      data: {
        uid,
        num
      },
      header: {
        'content-type': 'application/json'
      },
      method: 'GET',
      dataType: 'json',
      responseType: 'text',
      success(res) {
        // 每次加载数据,请求一次就发送10条数据过来
        let eachData = res.data.all_list;
 
        if (eachData.length == 0) {
          wx.showToast({
            title: '没有更多数据了!~',
            icon: 'none'
          })
        } else {
          wx.showToast({
            title: '数据加载中...',
            icon: 'none'
          })
        }
         
        _page.setData({
          loadText: "数据请求中",
          loading: true,
          ranklist: ranklistBefore.concat(eachData),
          loadText: "加载更多",
          loading: false,
        });
      }
    })
  }
});