写一个带有记账本的微信小程序并给出代码

以下是一个简单的带有记账本功能的微信小程序代码:

index.wxml:

<view class="container">
  <view class="header">我的账本</view>
  <view class="balance">余额：{{balance}}</view>
  <view class="form">
    <input placeholder="请输入金额" bindinput="inputChange" value="{{inputValue}}" />
    <button bindtap="spendMoney">支出</button>
    <button bindtap="earnMoney">收入</button>
  </view>
  <view class="list">
    <view wx:for="{{recordList}}" wx:key="{{index}}">
      <view class="item {{item.type}}">{{item.type}}：{{item.money}}元</view>
    </view>
  </view>
</view>

index.js:

Page({
  data: {
    balance: 0,
    inputValue: '',
    recordList: []
  },

  inputChange: function(e) {
    this.setData({
      inputValue: e.detail.value
    })
  },

  spendMoney: function() {
    if (this.data.inputValue === '') {
      return;
    }

    var recordList = this.data.recordList;
    recordList.push({
      type: '支出',
      money: this.data.inputValue
    });

    var balance = this.data.balance - parseFloat(this.data.inputValue);

    this.setData({
      balance: balance.toFixed(2),
      inputValue: '',
      recordList: recordList
    });
  },

  earnMoney: function() {
    if (this.data.inputValue === '') {
      return;
    }

    var recordList = this.data.recordList;
    recordList.push({
      type: '收入',
      money: this.data.inputValue
    });

    var balance = this.data.balance + parseFloat(this.data.inputValue);

    this.setData({
      balance: balance.toFixed(2),
      inputValue: '',
      recordList: recordList
    });
  }
})

index.wxss:

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 30px;
}

.header {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 20px;
}

.balance {
  font-size: 18px;
  margin-bottom: 20px;
}

.form {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.form input {
  width: 200px;
  height: 40px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 0 10px;
  margin-right: 10px;
}

.form button {
  width: 60px;
  height: 40px;
  background-color: #007aff;
  color: #fff;
  border-radius: 4px;
  border: none;
}

.list {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 30px;
}

.item {
  font-size: 16px;
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 4px;
}

.item.spend {
  color: red;
}

.item.earn {
  color: green;
}

这个小程序实现了一个简单的记账本功能，用户可以在输入框中输入金额，然后选择支出或收入按钮来记录自己的花费和收入情况。同时，页面中会显示当前的余额和历史记录列表。