vue实现大转盘抽奖

本案例为在小程序中实现的转盘抽奖，其他手机端项目思路类似。

注意： 转盘上的东西是由后台web项目里的配置页进行配置的，可以配置每个位置的奖品，中奖概率等。此文章只讲了抽奖转盘的实现，配置可根据真实需求进行开发即可，这里不作叙述。真实上线的时候，只需要将其中的转盘奖品信息，中奖位置索引，中奖次数，活动说明，中奖记录改成后台接口调用即可，此处仅在代码里模拟数据。

效果图如下：

代码如下：

<template>
	<view class="content">
		<view class="lotteryPage">
			<image src="../static/drawLottery/drawLotteryTitle.png" mode="aspectFit" class="titlePng">image>
			<view class="activeExplainDiv">
				<view class="activeExplain">
					活动说明
				view>
			view>
			<view class="lotteryBody">
				<view class="roteDiv" :style="{transform:rotate_deg,transition:rotate_transition}">
					<image src="../static/drawLottery/zhuanPan.png" mode="aspectFit" class="zhuanPan">image>
					<view :class="'zhuanPanCon zhuanPanCon'+index" v-for="(item,index) in prizeArr">
						<view class="prizeTextSty">{{item.text}}view>
						<image
							:src="item.type ===  0?'../static/drawLottery/thanksPng.png':item.type ===  1?'../static/drawLottery/couponPng.png':'../static/drawLottery/integrationPng.png'"
							mode="aspectFit" class="prizeImgSty">image>
					view>
				view>
				<image src="../static/drawLottery/zhuanBorder.png" mode="aspectFit" class="zhuanBorder">image>
				<image src="../static/drawLottery/clickBtn.png" mode="aspectFit" class="clickBtn" @click="drawLottery">image>
			view>
			<view class="bottomBlock">
				<view class="bottomLine">
					<view class="shengYuTimes">剩余{{LuckyClick}}次抽奖次数view>
				view>
				<view class="bottomLine">
					<view class="recordSty">中奖记录view>
				view>
			view>

		view>
	view>
template>

<script>
	export default {
		data() {
			return {
				LuckyClick: 3,
				angle: 60, //总共6个扇形区域，每个区域约60度
				isAllowClick: true, //是否能够点击
				rotate_deg: 0, //指针旋转的角度
				rotate_transition: "transform 3s ease-in-out", //初始化选中的过度属性控制
				prizeArr: [{
						id: 1,
						sort: 1,
						text: '谢谢参与',
						type: 0

					},
					{
						id: 2,
						sort: 2,
						text: '600积分x6',
						type: 2

					},
					{
						id: 3,
						sort: 3,
						text: '500元券x3',
						type: 1

					},
					{
						id: 4,
						sort: 4,
						text: '谢谢参与',
						type: 0

					},
					{
						id: 5,
						sort: 5,
						text: '20000积分x10',
						type: 2

					},
					{
						id: 6,
						sort: 6,
						text: '3000元券x2',
						type: 1

					}
				]
			}
		},
		methods: {
			drawLottery() {
				if (this.LuckyClick == 0) {
					uni.showToast({
						title: '机会已经用完了',
						duration: 2000,
						icon: 'none'
					});
					return;
				}
				this.rotating();
			},
			rotating() {
				if (!this.isAllowClick) return;
				this.isAllowClick = false;
				this.rotate_transition = "transform 3s ease-in-out";
				this.LuckyClick--;
				let rand_circle = 5; //默认多旋转5圈
				let winningIndex = 4 //模拟中奖位置,此处到时调用后台接口取值
				let deg = rand_circle * 360 + winningIndex * this.angle; //将要旋转的度数
				this.rotate_deg = "rotate(" + deg + "deg)";
				let that = this
				setTimeout(() => {
					uni.showModal({
						title: '中奖结果',
						content: '500优惠券x3',
						showCancel: false,
						success: function(res) {
							if (res.confirm) {
								console.log('用户点击确定');
								that.isAllowClick = true;
								that.rotate_deg = "rotate(" + 0 + "deg)"; //定时器关闭的时候重置角度
								that.rotate_transition = "";
							}
						}
					});
				}, 4000)

			}
		}
	}
script>

<style scoped>
	.content {
		padding: 0;
		overflow: hidden;
		background-image: url(base64);	// 这里需要自行在网上将背景图转为base64,替换掉url里的base64,因为小程序不支持,其他情况下可直接使用.
		background-repeat: no-repeat;
		background-attachment: fixed;
		background-size: cover;
	}

	.lotteryPage {
		height: 100%;
		overflow: hidden;
		display: flex;
		flex-direction: column;
		align-items: center;
	}

	.titlePng {
		margin-top: 60px;
		height: 66px;
	}

	.activeExplainDiv {
		margin: 20px 0;
		width: 100%;
		display: flex;
		justify-content: flex-end;
	}

	.activeExplain {
		padding: 8px 0;
		width: 80px;
		text-align: center;
		border-bottom-left-radius: 18px;
		border-top-left-radius: 18px;
		background-color: rgba(188, 56, 23, 0.29);
		color: #faf0d8;
		font-size: 12px;
	}

	.lotteryBody {
		width: 320px;
		height: 320px;
		position: relative;
	}

	.roteDiv {
		width: 100%;
		height: 100%;
	}

	.zhuanPan {
		width: 100%;
		height: 100%;
	}

	.zhuanPanCon {
		position: absolute;
	}

	.zhuanPanCon0 {
		top: 14%;
		left: 50%;
		transform: translateX(-50%);
		text-align: center;
	}

	.zhuanPanCon1 {
		top: 28%;
		right: 18%;
		transform: rotate(60deg);
		text-align: center;
	}

	.zhuanPanCon2 {
		bottom: 28%;
		right: 18%;
		transform: rotate(120deg);
		text-align: center;
	}

	.zhuanPanCon3 {
		bottom: 14%;
		right: 51%;
		transform: rotate(180deg) translateX(-50%);
		text-align: center;
	}

	.zhuanPanCon4 {
		bottom: 28%;
		left: 16%;
		transform: rotate(240deg);
		text-align: center;
	}

	.zhuanPanCon5 {
		top: 30%;
		left: 18%;
		transform: rotate(300deg);
		text-align: center;
	}

	.prizeTextSty {
		color: #c73d18;
		font-size: 12px;
	}

	.prizeImgSty {
		width: 40px;
		height: 40px;
	}

	.zhuanBorder {
		width: 100%;
		height: 100%;
		position: absolute;
		top: 0;
		left: 0;
	}

	.clickBtn {
		width: 60px;
		height: 80px;
		position: absolute;
		top: 46%;
		left: 50%;
		transform: translate(-50%, -50%);
	}

	.bottomBlock {
		margin-top: 10px;
		flex: 1;
		display: flex;
		flex-direction: column;
		align-items: center;
	}

	.bottomLine {
		flex: 1;
		display: flex;
		align-items: center;
	}

	.shengYuTimes {
		padding: 8px 40px;
		background-color: #bc3817;
		color: #faf0d8;
		font-size: 12px;
		border-radius: 16px;
	}

	.recordSty {
		text-decoration: underline;
		font-size: 14px;
		color: #ca411f;
	}
style>

上面所用到的图片资源文件截图(并非真实图片文件大小，真实需要可自行让UI设计制作即可)：