school_meal_wxapp/pages/pay/pay.js

// pages/pay/pay.js
const app = getApp();
const { axios } = app.globalData;
Page({

  /**
   * 页面的初始数据
   */
  data: {
    loadding: false,//正在支付中 true
    disabled: false,//支付完毕 true
    message: '',//订单备注
    paytype: "1",// 支付方式 单选
    balance: null,//余额
    result: [],//复选框
  },
  // 请求余额
  Request () {
    let that = this;
    axios({
      url: '/option/balance/',
      method: 'get',
      success (res) {
        let { data } = res.data;
        that.setData({
          ...data[0]
        })
      }
    })
  },
  // 复选框
  checkboxonchange (e) {
    let { detail } = e;
    this.setData({
      result: detail
    })
  },
  // 提交支付
  onSubmit () {
    let { commodity, message: notes, useraddress, paytype, result } = this.data, { id: student } = useraddress, that = this, balance = '';
    if (!student) {
      wx.showToast({
        title: '请选择学生',
        icon: 'error'
      })
      return false;
    }
    if (result.indexOf('1') > -1) {
      balance = 2;
    }
    let { appid, user } = app.globalData, { openid } = user;
    function pay () {
      return new Promise(resolve => {
        axios({
          url: `/order/`,
          method: 'post',
          data: {
            appid, openid, notes, commodity, student, balance
          },
          success (res) {
            that.setData({ loadding: true })
            let { data } = res.data;
            if (!data) {
              resolve({ type: 1, value: "支付成功" });
              return false;
            }
            wx.requestPayment({
              timeStamp: data.timeStamp,
              nonceStr: data.nonceStr,
              package: data.package,
              signType: data.signType,
              paySign: data.paySign,
              success: function (res) {
                resolve({ type: 1, value: "支付成功" })
              },
              fail: function () {
                // 取消付款
                resolve({ type: 2, value: "支付失败" })
              },
            })
          }
        })
      })
    }
    pay().then(
      res => {
        that.setData({ loadding: false, disabled: true });
        wx.lxd.Notify({ type: res.type == 1 ? 'success' : '', message: res.value })
        const time = setTimeout(() => {
          wx.redirectTo({
            url: '/pages/order/order',
          })
          clearTimeout(time)
        }, 3000)
      }
    );
  },
  // 挑选地址
  ChooseAddress () {
    wx.navigateTo({
      url: `/pages/adddata/adddata?data=${JSON.stringify({ source: 'pay' })}`,
    })
  },
  // 支付方式改变
  onChange (e) {
    let { detail } = e;
    this.setData({ paytype: detail })
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    wx.lxd.Ctr({
      // nav
      title: "支付", //标题
      bgc: false,//使用更改后的颜色;配合json使用
    })
    let { data } = options;
    if (!!data) {
      data = JSON.parse(data);
      this.setData({
        ...data,
        commodity: data.id
      })
    }
  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {
    this.Request()
    let { useraddress } = app.globalData;
    this.setData({ useraddress })
  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {
    app.globalData.useraddress = {};
  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh: function () {

  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {

  },
})