呼叫系統的API，系統有提供下拉重新整理的API介面 

//獲取應用例項
const app = getApp()
var page = 1;
var isfinish = false; //載入完畢

function loadmore(that) {
  if (isfinish) return;

  wx.showLoading({
    title: '正在載入中',
  })
  wx.request({
    url: app.globalData.url.studentlist,
    header: {
      Cookie: wx.getStorageSync('session_id')
    },
    data: {
      page: page,
      condition: that.data.condition

    },
    
    success: (res) => {
      wx.hideLoading();

      if (res.data.length > 0) {
        var list = that.data.list;

        for (var i = 0; i < res.data.length; i++) {
          list.push(res.data[i]);
        }
        that.setData({ list: list });
        page++;

      } else {
        isfinish = true;
      }

      wx.stopPullDownRefresh();
    }
  })
}
 

//頁面相關事件處理函式--監聽使用者下拉動作
  onPullDownRefresh: function () {
    page = 1;
    isfinish = false;
    this.setData({list:[]});
    loadmore(this);
  },

   //頁面上拉觸底事件的處理函式
   
  onReachBottom: function () {
    var that = this;
    loadmore(that);
  },