applet_nongchang/template/home/index.js

const app = getApp();

Page({
  cashdialog: null,
  pg: 1,
  data: {
    isShowNull: false
  },
  onLoad: function (options) {
    if (app.isLogin){
      this.getHomeData(this);
    }else{
      var that = this;
      wx.login({
        success: function (res) {
          if (res.code) {
            app.request("passport.applet.bind", {
              code: res.code
            }, {
                success: function (data, res) {
                  that.getHomeData(that);
                }
              })
          }
        }
      })
    }
  },

  /**
   * 获取首页数据
   */
  getHomeData: function(that){
    if (that.pg == 1) {
      app.showLoading();
    }
    that.cashdialog = that.selectComponent("#cashdialog");
    app.set(that, 'loadMoreText', '正在加载');
    app.request('product.api.home', {
      pg: that.pg
    }, {
        success: function (data, res) {
          if (data.product.length > 0) {
            if (that.pg > 1) {
              app.setList(that, data.product, true);
            } else {
              app.setList(that, data.product);
            }
            that.pg++;
            app.set(that, 'isShowNull', false);
          } else {
            app.set(that, 'isShowNull', true);
          }
          app.hideLoading();
        }
      });
  },

  /**
   * 查看商品详情
   */
  view: function (event) {
    let id = app.getData(event).id;
    app.location('view/index?id=' + id);
  },

  /**
   * 礼品卡兑换
   */
  cash: function(e){
    if(app.isLogin()){
      this.cashdialog.setErrMsg('');
      this.cashdialog.showDialog();
    }else{
      app.location('login/index');
    }
  },

  /**
   * 跳转兑换页面
   */
  toCash: function(){
    var that = this;
    var cashCode = this.cashdialog.getCashCode();

    if (cashCode.length <= 0) {
      that.cashdialog.setErrMsg('请输入兑换码!');
      return ;
    }
    app.request('product.api.checkCode', {
      code: cashCode
    }, {
        success: function (data, res) {
          that.cashdialog.hideDialog();
          app.location('cash/index?code=' + cashCode);
        },
        fail: function (res) {
          that.cashdialog.setErrMsg(res.data.msg);
        }
    });
  },

  /**
   * 页面下拉事件的处理函数
   */
  onPullDownRefresh: function () {
    this.pg = 1;
    app.startPullDown(this);
  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {
    app.startPullDown(this);
  },
})