vuejs2.0 购物车数量增减 类radio单选框

---

主要讲解 购买数量 选择 以及 有效时间选择 模块

数量增减 主要涉及到 最小最大范围 以及手动输入 只能输入数字的计算

有效时间选择 模块类radio 单选框 比较简单 监控当前选中的index

---

父组件

<div class="sales-board-line">
              <div class="sales-board-line-left">
                  购买数量：
              </div>
              <div class="sales-board-line-right">
                <v-counter @on-change="onParamChange('buyNum', $event)"></v-counter>
              </div>
          </div>
<div class="sales-board-line">
              <div class="sales-board-line-left">
                  有效时间：
              </div>
              <div class="sales-board-line-right">
                  <v-chooser
                  :selections="periodList"
                  @on-change="onParamChange('period', $event)"></v-chooser>
              </div>
          </div>

<script>
import VCounter from '../../components/base/counter'
import VChooser from '../../components/base/chooser'
import _ from 'lodash'
export default {
  components: {

    VCounter,
    VChooser

  },
  data () {
    return {
      buyNum: 0,
      buyType: {},
      versions: [],
      period: {},
      price: 0,
      versionList: [
        {
          label: '客户版',
          value: 0
        },
        {
          label: '代理商版',
          value: 1
        },
        {
          label: '专家版',
          value: 2
        }
      ],
      periodList: [
        {
          label: '半年',
          value: 0
        },
        {
          label: '一年',
          value: 1
        },
        {
          label: '三年',
          value: 2
        }
      ],
      buyTypes: [
        {
          label: '入门版',
          value: 0
        },
        {
          label: '中级版',
          value: 1
        },
        {
          label: '高级版',
          value: 2
        }
      ],
      isShowPayDialog: false,
      bankId: null,
      orderId: null,
      isShowCheckOrder: false,
      isShowErrDialog: false
    }
  },
  methods: {
    onParamChange (attr, val) {
      this[attr] = val
      // this.getPrice()
      console.log(this[attr], attr)
    },
    getPrice () {
      let buyVersionsArray = _.map(this.versions, (item) => {
        return item.value
      })
      let reqParams = {
        buyNumber: this.buyNum,
        buyType: this.buyType.value,
        period: this.period.value,
        version: buyVersionsArray.join(',')
      }
      this.$http.post('/api/getPrice', reqParams)
      .then((res) => {
        this.price = res.data.amount
      })
    },

    onChangeBanks (bankObj) {
      this.bankId = bankObj.id
    },
    confirmBuy () {
      let buyVersionsArray = _.map(this.versions, (item) => {
        return item.value
      })
      let reqParams = {
        buyNumber: this.buyNum,
        buyType: this.buyType.value,
        period: this.period.value,
        version: buyVersionsArray.join(','),
        bankId: this.bankId
      }
      this.$http.post('/api/createOrder', reqParams)
      .then((res) => {
        this.orderId = res.data.orderId
        this.isShowCheckOrder = true
        this.isShowPayDialog = false
      }, (err) => {
        this.isShowBuyDialog = false
        this.isShowErrDialog = true
      })
    }
  },
  mounted () {   
    this.buyNum = 1
    this.buyType = this.buyTypes[0]
    this.versions = [this.versionList[0]]
    this.period = this.periodList[0]
    this.getPrice()
  }
}
</script>

mounted 页面渲染完毕 加载默认选项 以及 调取数据接口

---

子组件

<template>
    <div class="counter-component">
      <div class="counter-btn" @click="minus"> - </div>
      <div class="counter-show">
        <input type="text" v-model="number" @keyup="fixNumber">
      </div>
      <div class="counter-btn" @click="add"> + </div>
    </div>
</template>

<script>
export default {
  props: {
    max: {
      type: Number,
      default: 5
    },
    min: {
      type: Number,
      default: 1
    }
  },
  data () {
    return {
      number: this.min
    }
  },
  watch: {
    number () {
      this.$emit('on-change', this.number)
    }
  },
  methods: {
    fixNumber () {
      let fix
      if (typeof this.number === 'string') {
        fix = Number(this.number.replace(/\D/g, ''))
      }
      else {
        fix = this.number
      }
      if (fix > this.max || fix < this.min) {
        fix = this.min
      }
      this.number = fix
    },
    minus () {
      if (this.number <= this.min) {
        return
      }
      this.number --
    },
    add () {
      if (this.number >= this.max) {
        return
      }
      this.number ++
    }
  }
}
</script>

<style scoped>
.counter-component {
  position: relative;
  display: inline-block;
  overflow: hidden;
  vertical-align: middle;
}
.counter-show {
  float: left;
}
.counter-show input {
  border: none;
  border-top: 1px solid #e3e3e3;
  border-bottom: 1px solid #e3e3e3;
  height: 23px;
  line-height: 23px;
  width: 30px;
  outline: none;
  text-indent: 4px;
}
.counter-btn {
  border: 1px solid #e3e3e3;
  float: left;
  height: 25px;
  line-height: 25px;
  width: 25px;
  text-align: center;
  cursor: pointer;
}
.counter-btn:hover {
  border-color: #4fc08d;
  background: #4fc08d;
  color: #fff;
}

</style>

类radio单选框

子组件

<template>
    <div class="chooser-component">
        <ul class="chooser-list">
          <li
          v-for="(item, index) in selections"
          @click="chosenSelection(index)"
          :title="item.label"
          :class="{active:index === nowIndex}"
          >{{ item.label }}</li>
        </ul>
      </div>
    </div>
</template>

<script>
export default {
  props: {
    selections: {
      type: Array,
      default: [{
        label: 'test',
        value: 0
      }]
    }
  },
  data () {
    return {
      nowIndex: 0
    }
  },
  methods: {
    chosenSelection (index) {
      this.nowIndex = index
      this.$emit('on-change', this.selections[index])
    }
  }
}
</script>

<style scoped>
.chooser-component {
  position: relative;
  display: inline-block;
}
.chooser-list li{
  display: inline-block;
  border: 1px solid #e3e3e3;
  height: 25px;
  line-height: 25px;
  padding: 0 8px;
  margin-right: 5px;
  border-radius: 3px;
  text-align: center;
  cursor: pointer;
}
.chooser-list li.active {
  border-color: #4fc08d;
  background: #4fc08d;
  color: #fff;
}
</style>