vue uniapp 转盘抽奖效果

html代码：

<view class="activity-con">
			<view class="activity-bacg">
				<!-- 首页进入转盘内容 -->
				<view class="activity-bacg-zhuanpan">
					<view class="activity-bacg-zhuanpan-bg">
						<!-- 转盘外圈 -->
						<image mode="widthFix" src="../../static/zp-quan.png"></image>
						<!-- 等分圆 -->
						<view id="circle0" :class="[isRotate?'rotate':'']"
							:style="{transform: 'rotate('+rotate+'deg)'}">
							<!-- 循环前一半等分圆 -->
							<view id="left">
								<view class="circle-left" :id="'rotate-'+i+'-'+(360/count)*i" v-for="(v,i) in count"
									v-if="(count/2>i)"
									:style="{ transform: 'rotate('+(360/count)*i+'deg)', 'background': (i%2==0?'linear-gradient(#fee59c,#fbefcf)':'linear-gradient(#ffffff,#fbefcf)')}">
									<label>￥123*{
   {(i+1)}}</label>
								</view>
							</view>
							<!-- 循环后一半等分圆 -->
							<view id="right">
								<view class="circle-right" :id="'rotate-'+i+'-'+(360/count)*(i+1)"
									v-for="(v,i) in count" v-if="((count/2)<=i)"
									:style="{ transform: 'rotate('+(360/count)*(i+1)+'deg)', 'background': (i%2==0?'linear-gradient(#fee59c,#fbefcf)':'linear-gradient(#fbefcf,#ffffff)'), 'z-index':(count-i) }">
									<label>￥123*{
   {(i+1)}}</label>
								</view>
							</view>
						</view>
						<!-- 转盘go按钮 -->
						<view class="activity-bacg-zhuanpan-btn" @click="subActivity">
							<image src="../../static/zp-go.png"></image>
						</view>
					</view>
				</view>
			</view>
		</view>
		<!-- 抽奖成果后弹出的结果框 -->
		<view class="activity-result" v-if="showResult">
			<view class="activity-result-con">
				<image mode="widthFix" src="../../static/zp-result.png"></image>
				<view class="activity-result-text">
					<view>1230元现金抵扣券</view>
					<view>共10张面额为123元优惠券</view>
				</view>
				<view class="activity-result-btn">
					<button class="medium" type="round" @click="goIndex">立即使用</button>
				</view>
			</view>
		</view>

js代码

<script>
	export default {
    
		components: {
    
			headers,
		},
		data() {
    
			return {
    
				count: 10, //等分圆分几份，可根据接口返回数据列表取length
				index: 2, //当前中奖数字坐标
				rotate: '', //转盘中奖后的旋转角度
				isRotate: false,
				num: 3, //转盘转3秒后再定位到中奖位置
				showResult: false,
			}
		},
		methods: {
    
			subActivity() {
    
				this.isRotate = true
				this.getDjs();
			},

			getDjs() {
    
				var that = this;
				if (that.num > 0) {
    
					setTimeout(() => {
    
						that.num--;
						that.getDjs();
					}, 1000)
				} else {
    
					that.num = 3;
					that.isRotate = false;
					// 前一半数据旋转定位计算：360度 - 当前中奖结果的deg - 多余的deg
					if (that.index < (that.count / 2)) {
    
						that.rotate = 360 - ((360 / that.count) * (that.index)) - (360 / that.count / 2);
					}
					// 后一半数据旋转定位计算：360度 - 当前中奖结果的deg + 多余的deg
					if (that.index >= (that.count / 2)) {
    
						that.rotate = 360 - ((360 / that.count) * (that.index + 1)) + (360 / that.count / 2);
					}
					that.showResult = true;
				}
			}
		}
	}
</script>

<style>
	.activity-index {
      
		width: 100%;
		margin-top: 80px;
	}

	.activity-con {
      
		width: 100%;
	}

	.activity-bacg {
      
		width: 100%;
		position: relative;
	}

	.activity-bacg-img {
      
		width: 100%;
	}

	.activity-bacg-zhuanpan {
      
		width: 260px;
		position: absolute;
		top: 32%;
		left: 50%;
		transform: translate(-50%, 0);
	}

	.activity-bacg-zhuanpan-bg {
      
		width: 100%;
		position: relative;
	}

	.activity-bacg-zhuanpan-bg image {
      
		width: 100%;
	}

	/* 等分圆 */
	.circle-left {
      
		width: 115px;
		height: 230px;
		border-radius: 0px 115px 115px 0px;
		position: absolute;
		right: 0;
		transform-origin: 0 50%;
	}

	.circle-left label {
      
		display: inline-block;
		text-indent: 0;
		margin-top: 36px;
		font-size: 14px;
		line-height: 12px;
		transform: rotate(109deg);
		color: #FF5722;
		font-weight: 500;
	}

	.circle-right {
      
		width: 115px;
		height: 230px;
		border-radius: 115px 0px 0px 115px;
		position: absolute;
		right: 0;
		transform-origin: 100% 50%;
	}

	.circle-right label {
      
		display: inline-block;
		text-indent: 0;
		margin-top: 36px;
		font-size: 14px;
		line-height: 12px;
		transform: rotate(66deg);
		color: #FF5722;
		font-weight: 500;
		margin-right: 0px;
	}

	#circle0 {
      
		width: 230px;
		height: 230px;
		border-radius: 115px;
		background-color: white;
		position: absolute;
		transform: rotate(-22.5deg);
		left: 15px;
		top: 15px;
		transform: rotate(36deg);
	}

	#left {
      
		clip: rect(0px 115px 230px 0px);
		position: absolute;
		right: 0px;
		width: 115px;
		height: 230px;
		overflow: hidden;
		text-indent: -2px;
	}

	#right {
      
		clip: rect(0px 115px 230px 0px);
		position: absolute;
		left: 0px;
		width: 115px;
		height: 230px;
		overflow: hidden;
		text-align: right;
	}

	/* 转盘按钮 */
	.activity-bacg-zhuanpan-btn {
      
		position: absolute;
		width: 60px;
		height: 80px;
		top: 45%;
		left: 50%;
		transform: translate(-50%, -50%);
	}

	.activity-bacg-zhuanpan-btn image {
      
		width: 100%;
		height: 100%;
	}

	/* 动画 */
	@keyframes rotation {
      
		from {
      
			transform: rotate(0deg);
		}

		to {
      
			transform: rotate(360deg);
		}
	}

	.rotate {
      
		animation: rotation .4s infinite linear;
	}

	/* 中奖结果 */
	.activity-result {
      
		position: fixed;
		width: 100%;
		height: 100%;
		background-color: #ffffff7a;
		top: 0;
		left: 0;
	}

	.activity-result-con {
      
		position: absolute;
		width: 70%;
		top: 50%;
		left: 50%;
		transform: translate(-50%, -50%);
	}

	.activity-result-con image {
      
		width: 100%;
	}

	.activity-result-text {
      
		position: absolute;
		top: 35%;
		text-align: center;
		width: 100%;
		font-size: 12px;
		color: #666;
	}

	.activity-result-text view:first-child {
      
		color: #b4350d;
		font-weight: 600;
		font-size: 16px;
		margin-bottom: 10px;
	}

	.activity-result-btn {
      
		position: absolute;
		bottom: 50px;
		width: 100%;
		text-align: center;
	}

	.activity-result-btn button {
      
		background-color: #fdcc83;
		border: 0;
		color: #8f3c00;
	}

	/* cpd分享表单 */
	.activity-bacg-share {
      
		width: 260px;
		position: absolute;
		top: 32%;
		left: 50%;
		transform: translate(-50%, 0);
	}

	.activity-bacg-share-title {
      
		margin-bottom: 10px;
	}
</style>