Vuejs实战案例-Vuejs实现老虎机抽奖总结

大家好！先上图看看本次案例的整体效果。

实现思路：

1. Vue component 实现老虎 - 机组件，可以嵌套到任意要使用的页面。
2. css3 transform 控制老虎 - 机抽奖过程的动画效果。
3. 抽奖组件内使用钩子函数 watch 监听抽奖结果的返回情况播放老虎 - 机动画并给用户弹出中奖提示。
4. 中奖结果弹窗，为抽奖组件服务。

实现步骤如下：

1. 构建 api 奖品配置信息和抽奖接口，vuex 全局存放奖品配置和中奖结果数据信息。
api：

export default {getPrizeList () {
    let prizeList = [
      {
        id: 1,
        name: '小米 8',
        img: 'https://i1.mifile.cn/f/i/g/2015/cn-index/m8-140.png'
      },
      {
        id: 2,
        name: '小米电视',
        img: 'https://i1.mifile.cn/f/i/g/2015/TV4A-43QC.png'
      }, {
        id: 3,
        name: '小米平衡车',
        img: 'https://i1.mifile.cn/f/i/g/2015/cn-index/scooter-140!140x140.jpg'
      }, {
        id: 4,
        name: '小米耳机',
        img: 'https://c1.mifile.cn/f/i/g/2015/video/pinpai140!140x140.jpg'
      }
    ]
    return prizeList
  },
  lottery () {
    return {
      id: 4,
      name: '小米耳机',
      img: 'https://c1.mifile.cn/f/i/g/2015/video/pinpai140!140x140.jpg'
    }
  }
}

store:

import lotteryApi from '../../api/lottery.api.js'

const state = {prizeList: [],
  lotteryResult: {}}

const getters = {
  prizeList: state => state.prizeList,
  lotteryResult: state => state.lotteryResult
}

const mutations = {SetPrizeList (state, { prizeList}) {state.prizeList = prizeList},
  SetLotteryResult (state, { lotteryResult}) {state.lotteryResult = lotteryResult}
}

const actions = {getPrizeList ({ commit}) {let result = lotteryApi.getPrizeList()
    commit('SetPrizeList', { prizeList: result})
  },
  lottery ({commit}) {let result = lotteryApi.lottery()
    commit('SetLotteryResult', { lotteryResult: result})
  }
}

export default {
  state,
  getters,
  mutations,
  actions,
  namespaced: true
}

2. 编写抽奖组件，为保证通用性，组件只负责播放抽奖结果。接收两个数据和一个方法，如下：
数据一：预置的奖品列表数据（轮播奖品需要）
数据二：抽奖结果，播放抽奖动画和弹出中奖结果需要
方法：抽奖动作，返回的抽奖结果数据即为数据二，响应式传递给组件
大概代码思路如下（仅供参考，不可运行

<template>
  <section>
    <div class="main">
      <!-- 老虎 - 机 -->
      <div class="recreation">
        <div class="recreation-list clearfix" v-if="slotPrizes.length>0">
          <ul class="recreation-item" v-bind:style="{transform:'translateY('+y1+'rem)'}">
            <li class="recreation-prices" v-for="(item,index) in slotPrizes" v-bind:key="index">
              <img v-bind:src="item.img" alt>
            </li>
          </ul>
          <ul class="recreation-item" v-bind:style="{transform:'translateY('+y2+'rem)'}">
            <li class="recreation-prices" v-for="(item,index) in slotPrizes" v-bind:key="index">
              <img v-bind:src="item.img" alt>
            </li>
          </ul>
          <ul class="recreation-item" v-bind:style="{transform:'translateY('+y3+'rem)'}">
            <li class="recreation-prices" v-for="(item,index) in slotPrizes" v-bind:key="index">
              <img v-bind:src="item.img" alt>
            </li>
          </ul>
        </div>
        <a
          href="javascript:;"
          @click="parentEmitLottery"
          class="btn-recreation"
        ></a>
      </div>
      <prize-pop :prize="lotteryResult" v-if="showPrize" @closeLotteryPop="showPrize=false"/>
    </div>
  </section>
</template>
<script>
import PrizePop from './common/prize-pop.vue'
export default {
  name: 'SlotMachine',
  data () {return {}
  },
  components: {PrizePop},
  props: {
    prizeList: {
      type: Array,
      default: () => []
    },
    lotteryResult: {
      type: Object,
      default: () => {}
    }
  },
  computed: {slotPrizes () {let prizes = []
      if (this.prizeList.length > 0) {Object.assign(prizes, this.prizeList)
        prizes.push(this.prizeList[0])
      }
      return prizes
    }
  },
  methods: {
    /**
     * 触发父页面调用抽奖
     */
    parentEmitLottery () {this.$emit('lottery')
    },
    /**
     * 开始抽奖
    */
    startLottery () {},
    /**
     * 获取中奖结果所在奖品列表中的索引，以确定抽奖动画最终落在哪个奖品
    */
    getPrizeIndex () {},
    /**
     * 执行抽奖动画
    */
    startPlay (index1, index2, index3) {}},
  watch: {
    /**
     * 监听抽奖结果，一旦有中奖信息就开始执行抽奖动画
     */
    lotteryResult (newVal, oldVal) {if (newVal.id && newVal.id > 0) {this.startLottery()
      }
    }
  }
}
</script>

3. 弹出中奖结果组件，依附于抽奖组件，在上一步的执行抽奖结果动画结束后执行。

<template>
<div class="subject-pop" style="z-index: 10;" v-if="prize.id>0">
      <div class="subject-pop-mask"></div>
      <div class="subject-pop-box">
        <h3> 恭喜您 </h3>
        <p>
          <img :src="prize.img" alt>
        </p>
        <h4> 获得
          <span></span>
          <span>{{prize.name}}</span>
        </h4>
        <div class="subject-pop-footer">
          <a href="javascript:;" class="november-btn1" @click="closeLotteryEmit"> 知道了 </a>
        </div>
      </div>
    </div>
</template>
<script>
export default {
  props: {
    prize: {
      type: Object,
      default: () => {
        return {id: 0}
      }
    }
  },
  methods: {closeLotteryEmit () {this.$emit('closeLotteryPop')
    }
  }
}
</script>

4. 抽奖组件运用在需要使用的页面中，此页面需要为抽奖组件提前准备好预置奖品列表和中奖结果信息，并提供好抽奖方法供子组件（抽奖组件）触发，触发完更改抽奖结果响应式传入到抽奖组件中。

<template>
<section>
    <div style="width:100%;text-align:center;margin:2rem 0;"> 您有一次抽奖机会，祝君好运~~~</div>
    <slotMachine :prizeList="prizeList" :lotteryResult="lotteryResult" @lottery="lottery"/>
</section>
</template>

<script>
import {mapGetters, mapActions} from 'vuex'
import slotMachine from '@/components/slotMachine'
export default {created () {this.getPrizeList()
  },
  components: {slotMachine},
  computed: {
    ...mapGetters({
      prizeList: 'lottery/prizeList',
      lotteryResult: 'lottery/lotteryResult'
    })
  },
  methods: {
    ...mapActions({
      getPrizeList: 'lottery/getPrizeList',
      lottery: 'lottery/lottery'
    })
  }
}
</script>

以上就是老虎机抽奖核心步骤的整体思路，欢迎讨论。