study_wxapp/pages/index/index.js

//index.js
//获取应用实例
const app = getApp()

Page({
  data: {
    spinShow: false,
    buyModel:false,
    code_url:'',
    info:{},
    system: "",
    groups: [],
    pushPaper: [],
    timeLimitPaper: [],
    userInfo:{},
    taskList: []
  },
  onLoad: function(){
    app.checkLogin( userInfo =>{
      this.setData({userInfo})
      this.indexLoad()
    })
    let that = this
    wx.getSystemInfo({
      success: function(res) {
        that.setData({system: res.system})
      }
    })
  },
  modalConfirm(){
    var imgSrc= this.data.code_url;
    var save = wx.getFileSystemManager();
    var number = Math.random();
    let that = this
    save.writeFile({
      filePath: wx.env.USER_DATA_PATH + '/pic' + number + '.png',
      data: imgSrc,
      encoding: 'base64',
      success: res => {
        wx.saveImageToPhotosAlbum({
          filePath: wx.env.USER_DATA_PATH + '/pic' + number + '.png',
          success: function (res) {
            wx.showToast({
              title: '保存成功',
            })
            that.setData({buyModel:false})
          },
          fail: function (err) {
            that.setData({buyModel:false})
          }
        })
      }, fail: err => {
        that.setData({buyModel:false})
      }
    })
    
  },
  onPullDownRefresh() {
    if (!this.loading) {
      this.indexLoad( this.stopPullDownRefresh )
    }
  },
  stopPullDownRefresh(){
    wx.stopPullDownRefresh()
  },
  showPhone(){
    wx.showToast({
      title: "手机"+this.data.userInfo.phone,
      type:'success',
      duration:2*1000
    })
  },
  indexLoad: function( cb ) {
    let _this = this
    app.formPost('Exam.index', {}).then(res => {
      if (res.code === 200) {
        _this.setData({
          groups: res.data.groups
        });
       cb&&cb() 
      }
    })
  },
  getPhoneNumber (e) {
    if( e.detail.errMsg =="getPhoneNumber:ok"){
      let param = {
        "iv": e.detail.iv,
        "encryptedData":e.detail.encryptedData,
      }
      app.formPost( "User.bindphone", param).then( (res)=>{
        if( res.code == 200){
          this.setData( {userInfo: res.data})
          app.setUserInfo( res.data )
          this.indexLoad()
        }
      })
    }else{
      app.message("绑定失败", 'error')
    }
  },
  gotoHistory: function(){
    wx.navigateTo({
      url: '/pages/record/index',
    })
  },
  gotoExam:function( e ){
    let groupId = e.currentTarget.dataset.id
    wx.navigateTo({
      url: `/pages/exam/do/index?id=${groupId}`
    })
  },
  gotoCollectin(){
    wx.navigateTo({
      url: '/pages/exam/index/index',
    })
  },
  doWxPay( data ){
    let that = this
    wx.requestPayment({
      timeStamp: data.timeStamp,
      nonceStr: data.nonceStr,
      package: data.package, 
      signType: data.signType,
      paySign: data.paySign,
      success: function (event) {
        wx.showModal({
          title: '支付成功',
          showCancel: false,
          content: '本次共支付费用￥'+(data.fee/100)+'元'+ `\n\n试卷更新可能延迟，请耐心等待`,
          success(res) {
            that.indexLoad()
          }
        })
      }
    })
  },
  startWxpay(e){
    let groupId = +e.currentTarget.dataset.id
    let system = this.data.system
    app.formPost('User.PayExam', {groupId, system}).then(res => {
      if (res.code === 200) {
        if( res.data.payType=="free" ){
          this.indexLoad()
        }else if (res.data.payType=="qrcode"){
          this.setData({info: res.data, buyModel:true})
        }else{
          this.doWxPay( res.data )
        }
      }
    })
  },
  onShareAppMessage: function(){

  },
  gotoError: function(){
    wx.navigateTo({
      url: '/pages/exam/error/index',
    })
  }
})