微信小程序封裝的Promise工具類 ES6語法

這個是工具類的方法，因爲首頁初次加載要加載很多請求，並且是依次執行。

function requestPromiseRes(url, data) {
  var m = 'POST';
  var promise =  new Promise(function (resolve, reject) {
    wx.request({
      url: url,
      header: {
        'content-type': 'application/x-www-form-urlencoded;charset=utf-8',
      },
      data: data,
      method: m,
      success: function (res1) {
        if (res1.data.code == "200") {
         // success(res1.data.data);
          resolve(res1.data.data);
        } else {
          console.log("數據---自行查看");
          resolve(res1.data);
        }
      },
      fail: function (err) {
        wx.hideLoading();
        wx.showModal({
          title: '提示',
          content: '網絡請求超時！',
          showCancel: false,
          success: function (res) { }
        })
        console.log("err", err);
        reject();
      }

    })
  });
  
  return promise;
}

首頁

//首頁加載頁面的所有執行方法
  executeMethodList() {
    this.getSysTemConfig().then(() => {//讀取配置信息
    this.getBanner().then(() => {//獲取輪播圖
      this.getGroupOrder().then(() => {//獲取拼團列表
              
      }) 
    })
    })
  },
  //讀取配置信息
  getSysTemConfig() {
    let that = this
    return requestPromiseRes(
      url.url.getSysTemConfig,
      {

      }
    ).then((res) => {
      app.globalData.defaultCity = res.default_city//默認推廣的城市
      pageParams.pageParams.endTimeScope = parseInt(res.group_over_time)//拼團結束的事件
      app.globalData.appointmentTimeDay = res.order_guide_time//推廣的天數
    
    }).catch((e) => { console.log("回調失敗" + e); })
  },
  
  //讀取輪播圖
  getBanner() {
    let that = this
    return requestPromiseRes(
      url.url.getBanner,
      {
        tourist_id: app.globalData.touristId,
      }
    ).then((res) => {
      that.setData({
        "bannerList": res.adsense
      })
      }).catch((e) => { console.log("回調失敗" + e); })
  },

首頁初次加載獲取openId

  getAuthKey: function() {
    var that = this;
    return new Promise(function(resolve, reject) {
      // 登錄從後臺讀取openId
      wx.login({
        success(res) {
          console.log(res)
          if (res.code) {
            // 發送 res.code 到後臺換取 openId, sessionKey, unionId
            wx.request({
              url: url.url.getOpenId,
              data: {
                code: res.code
              },
              success: function(res) {
                console.log(res)
                if (res.data.code == '200') {
                  //告知頁面開始授權訪問
                  pageParams.pageParams.isState = "2" //告知頁面授權訪問

                  //openId
                  //將獲取的openid賦值到全局變量
                  that.globalData.openId = res.data.openId;
                  //存儲tourist對象與touristId 賦值
                  if (res.data.tourist) {
                    that.globalData.touristId = res.data.tourist.tourist_id;
                    // that.globalData.touristId = "22fc3a89cebc4bb7827faad93d21820e7"
                    that.globalData.tourist = res.data.tourist;
                  }
                  var res = {
                    status: 200,
                  }
                  resolve(res);
                } else if (res.data.code == '401' || res.data.code == '402' || res.data.code == '403') {
                  //將獲取的openid賦值到全局變量
                  that.globalData.openId = res.data.openId;
                  console.log("用戶未綁定跳轉")
                  wx.navigateTo({
                    url: '../register/register'
                  });
                }
              },
            })
          } else {
            var res = {
              status: 300,
            }
            reject(res);
            console.log("獲取參數異常");
          }
        }
      })
    });
  },