2019年1月1日即将到来，码农们除了关心自己的技能之外，还有薪资是不是可以多拿点。 每次算的时候 都要百度一下个人所得税，但是很多都是老的税率计算，找一个新的出来还是比较麻烦，所以个人开发了一个最新税率的小程序。解决和我有着一样痛苦的码农们的问题。

根据最新税改后计算个人所得税的计算器。目前支持南京，后续开放 杭州 上海 北京等城市。 如果有疑问的可以加最下方 开发者微信。

• 首先在微信官网下载微信小程序开发工具 https://mp.weixin.qq.com
• 在https://mp.weixin.qq.com 注册小程序账号，完成个人实名认证。
• 在小程序后台拿到appid，下面就可以开发了。

实例查看二维码：

先使用weui 小程序ui框架就行页面布局

<button block type="dark" bindtap='calculationBindtap'>计算</button>

其次写JS代码（计算按钮逻辑代码）

import data from './data'const app = getApp;Page({data: {options1: data,value: '1',checked: true,standard: 1,marking: 5000,beforetaxCount: 0,specialitemCount: 0},calculationBindtap:function(){// 开始计算  计算完成把计算结果放在result对象中var beforetaxCount = this.data.beforetaxCount;var specialitemCount = this.data.specialitemCount;var marking = this.data.marking;if (beforetaxCount == null || beforetaxCount == 0 || beforetaxCount == ''){wx.showToast({title: '输入正确薪资',mask: true,icon: 'loading'})return;}if (specialitemCount == null || specialitemCount == ''){specialitemCount = 0;}// 开始计算var oldNum = 0.08;var medNum = 0.02;var unemNum = 0.005;var workNum = 0;var giveNum = 0;var providentfundNum = 0.08;var insuranceBase = 19935;var providentfundBase = 25300;var oldcount = 0;var medcount = 0;var unemcount = 0;var workcount = 0;var givecount = 0;var providentfundcount = 0;var privateFee = 0;var plusFee = 0;if(this.data.checked){if (parseFloat(beforetaxCount) > parseFloat(insuranceBase)) {oldcount = parseFloat(insuranceBase) * parseFloat(oldNum);medcount = parseFloat(insuranceBase) * parseFloat(medNum);unemcount = parseFloat(insuranceBase) * parseFloat(unemNum);workcount = parseFloat(insuranceBase) * parseFloat(workNum);givecount = parseFloat(insuranceBase) * parseFloat(giveNum);} else {oldcount = parseFloat(beforetaxCount) * parseFloat(oldNum);medcount = parseFloat(beforetaxCount) * parseFloat(medNum);unemcount = parseFloat(beforetaxCount) * parseFloat(unemNum);workcount = parseFloat(beforetaxCount) * parseFloat(workNum);givecount = parseFloat(beforetaxCount) * parseFloat(giveNum);}if (parseFloat(beforetaxCount) > parseFloat(providentfundBase)) {providentfundcount = parseFloat(providentfundBase) * parseFloat(providentfundNum);} else {providentfundcount = parseFloat(beforetaxCount) * parseFloat(providentfundNum);}}// 保险总费用var totalInsuranceFee = parseFloat(oldcount) + parseFloat(medcount) + parseFloat(unemcount) + parseFloat(workcount) + parseFloat(givecount);// 公积金费用 var totalProvidentfundFee = providentfundcount;// 下面的钱 交税console.log(this.data.marking);var otherFee = parseFloat(beforetaxCount) - parseFloat(totalInsuranceFee) - parseFloat(totalProvidentfundFee) - parseFloat(this.data.marking) - parseFloat(specialitemCount);if (parseFloat(otherFee) <= 3000 && parseFloat(otherFee) > 0) {privateFee = parseFloat(otherFee) * 0.03;plusFee = 0;}if (parseFloat(otherFee) <= 12000 && parseFloat(otherFee) > 3000) {privateFee = parseFloat(otherFee) * 0.1;plusFee = 210;}if (parseFloat(otherFee) <= 25000 && parseFloat(otherFee) > 12000) {privateFee = parseFloat(otherFee) * 0.2;plusFee = 1410;}if (parseFloat(otherFee) <= 35000 && parseFloat(otherFee) > 25000) {privateFee = parseFloat(otherFee) * 0.25;plusFee = 2660;}if (parseFloat(otherFee) <= 55000 && parseFloat(otherFee) > 35000) {privateFee = parseFloat(otherFee) * 0.3;plusFee = 4410;}if (parseFloat(otherFee) <= 80000 && parseFloat(otherFee) > 55000) {privateFee = parseFloat(otherFee) * 0.35;plusFee = 7160;}if ( parseFloat(otherFee) > 80000) {privateFee = parseFloat(otherFee) * 0.45;plusFee = 15160;}var result = {};result.insuranceCount = totalInsuranceFee;result.providentfundCount = totalProvidentfundFee;result.providentfundNum = parseFloat(providentfundNum) * 100;result.money = parseFloat(beforetaxCount) - parseFloat(totalInsuranceFee) - parseFloat(totalProvidentfundFee) - parseFloat(privateFee) + parseFloat(plusFee);result.privateFee = privateFee - parseFloat(plusFee);result.specialitemCount = specialitemCount;result.oldNum = parseFloat(oldNum) * 100;result.medNum = parseFloat(medNum) * 100;result.unemNum = parseFloat(unemNum) * 100;result.workNum = parseFloat(workNum) * 100;result.giveNum = parseFloat(giveNum) * 100;result.oldcount = parseFloat(oldcount);result.medcount = parseFloat(medcount);result.unemcount = parseFloat(unemcount);result.workcount = parseFloat(workcount);result.givecount = parseFloat(givecount);wx.setStorage({key: 'result',data: result,success:function(){wx.navigateTo({url: '../calculation/calculationResult',})}})},})

把计算好的结果放在result对象中 通过wx.setStorage 放在缓存中，传到下一个页面。最后展示出来。