大家好！先上图看看本次案例的整体效果。
实现思路：
- Vue component实现大转盘组件，可以嵌套到任意要使用的页面。
- css3 transform控制大转盘抽奖过程的动画效果。
- 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大转盘动画并给用户弹出中奖提示。
- 中奖结果弹窗，为抽奖组件服务。
实现步骤如下：
- 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
} - 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="lucky-item">
<img src="//www.cnblogs.com/images/cnblogs_com/codeon/878827/o_backImage.jpg"
alt>
<div class="lucky-box">
<img src="//www.cnblogs.com/images/cnblogs_com/codeon/878827/o_circle.jpg"
alt>
<ul id="wheel"
class="wheel-list"
:style="wheelStyle"
:class="transition">
<li v-for="(prize,index) in slotPrizes"
:style="{transform: 'rotate('+index*45+'deg)'}"
v-bind:key="index">
<div class="fan-item"
style="transform: rotate(15deg) skewY(45deg);"></div>
<div class="lucky-prize">
<h3>{{prize.name}}</h3>
</div>
</li>
</ul>
<div class="wheel-btn"
@click="$emit('lottery')">
<a>
<img src="//images.cnblogs.com/cnblogs_com/codeon/878827/o_go.jpg"
alt>
</a>
</div>
</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: 'BigTurntable',
data () {
return {
isStart: false,
showPrize: false,
wheelStyle: { 'transform': 'rotate(0deg)' },
transition: 'transitionclear',
playTurns: 5 // 默认先旋转5圈
}
},
components: {
PrizePop
},
props: {
prizes: {
type: Array,
required: false
},
lotteryResult: {
type: Object,
default: () => { }
}
},
computed: {
slotPrizes () {
var self = this
console.log(self.prizes)
let prizeList = []
prizeList.push({ ...self.prizes[0], slotIndex: 1 })
prizeList.push({ name: '谢谢参与', slotIndex: 2 })
prizeList.push({ ...self.prizes[1], slotIndex: 3 })
prizeList.push({ name: '谢谢参与', slotIndex: 4 })
prizeList.push({ ...self.prizes[2], slotIndex: 5 })
prizeList.push({ name: '谢谢参与', slotIndex: 6 })
prizeList.push({ ...self.prizes[3], slotIndex: 7 })
prizeList.push({ name: '谢谢参与', slotIndex: 8 })
console.log(prizeList)
return prizeList
}
},
methods: {
/**
* 执行抽奖动画
*/
playWheel (index) { },
/**
* 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 (prizeId) { }
},
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) {
var self = this
if (newVal.id && newVal.id > 0) {
let index = self.getPrizeIndex(newVal.id)
self.playWheel(index)
}
}
}
}
</script> - 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> - 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>
<BigTurntable :prizes="prizeList"
:lotteryResult="lotteryResult"
@lottery="lottery" />
</section>
</template> <script>
import { mapGetters, mapActions } from 'vuex'
import BigTurntable from '@/components/bigTurntable.vue'
export default {
name: 'BigTurntableRun',
created () {
var self = this
self.getPrizeList()
},
components: {
BigTurntable
},
computed: {
...mapGetters({
prizeList: 'lottery/prizeList',
lotteryResult: 'lottery/lotteryResult'
})
},
methods: {
...mapActions({
getPrizeList: 'lottery/getPrizeList',
lottery: 'lottery/lottery'
})
}
}
</script>以上就是大转盘抽奖核心步骤的整体思路，欢迎讨论。