微信小程序 实例应用（记账）详解

var util = require("../../utils/util.js");
//获取应用实例
var app = getApp();
Page({
 data: {
  userInfo: {},
  buttonLoading: false,
  accountData:[],
  accountTotal:0
 },
 onLoad: function () {
  console.log('onLoad')
  var that = this;
 
  // 获取记录
  var tempAccountData = wx.getStorageSync("accountData") || [];
  this.caculateTotal(tempAccountData);
  this.setData({
    accountData: tempAccountData
  });
 
 },
 // 计算总额
 caculateTotal:function(data){
   var tempTotal = 0;
   for(var x in data){
     tempTotal += parseFloat(data[x].amount);
   }
   this.setData({
    accountTotal: tempTotal
   });
 },
 //表单提交
 formSubmit:function(e){
   this.setData({
    buttonLoading: true
   });
 
   var that = this;
   setTimeout(function(){
     var inDetail = e.detail.value.inputdetail;
     var inAmount = e.detail.value.inputamount;
     if(inDetail.toString().length <= 0 || inAmount.toString().length <= 0){
       console.log("can not empty");
       that.setData({
        buttonLoading: false
       });
       return false;
     }
 
     //新增记录
     var tempAccountData = wx.getStorageSync("accountData") || [];
     tempAccountData.unshift({detail:inDetail,amount:inAmount});
     wx.setStorageSync("accountData",tempAccountData);
     that.caculateTotal(tempAccountData);
     that.setData({
       accountData: tempAccountData,
       buttonLoading: false
     });
 
   },1000);
 },
 //删除行
 deleteRow: function(e){
   var that = this;
   var index = e.target.dataset.indexKey;
   var tempAccountData = wx.getStorageSync("accountData") || [];
   tempAccountData.splice(index,1);
   wx.setStorageSync("accountData",tempAccountData);
   that.caculateTotal(tempAccountData);
   that.setData({
    accountData: tempAccountData,
   });
 }
})