vue+better-scroll实现左右菜单联动效果(移动端)

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前言

今天点外卖无意中发现外卖平台的左右联动界面效果挺有意思的,于是…通过查阅相关代码,耗费了几个小时,写出来一个小demo实例,也供大家参考,如果你有用到的话,可以根据代码注释结合自己的需求去调整。

实现效果

1.首先我们先安装一下相关依赖

cnpm install better-scroll
cnpm install stylus stylus-loader@3.0.1 --save-dev

2.在相关组件中引入

import BScroll from "better-scroll";

3.使用
完整实例代码

<template>
	<div>
		<div class="commodity">
			<!--// 左侧导航内容 -->
			<div class="leftNav">
				<ul>
					<li v-for="(item, index) in shopList" :key="index" :class=" typeStyle: index === currentIndex "
						@click="onClickNav(index)">
						<span class="leftTit"> item.shopName </span>
					</li>
				</ul>
			</div>
			<!--// 右侧商品内容 -->
			<div class="rightContant">
				<ul ref="shopContant">
					<li class="eventList" v-for="(item, index) in shopList" :key="index">
						<div class="rightTtitle"> item.shopName </div>
						<ul>
							<li class="gather" v-for="(item, index) in item.shopGather" :key="index">
								<div>
									<img :src="item.shopImgUrl" />
								</div>
								<div class="distance">
									<div class="shopName"> item.shopName </div>
									<div class="saleGood">
										<span>月售 item.monthNum </span>
										<span>好评率 item.reputation %</span>
									</div>
									<div class="price">
										<span> item.price </span>
									</div>
								</div>
							</li>
							<div style="height:1px"></div>
						</ul>
					</li>
				</ul>
			</div>
		</div>
	</div>
</template>

<script>
	import BScroll from "better-scroll"; //引入BScroll插件
	export default 
		data() 
			return 
				scrollY: 0, // 右侧滑动的时候距离顶部的值
				rightSide: [], // 所有右侧分类li的top组成的数组  (列表第一次显示后就不再变化)
				//模拟的商品数据
				shopList: [
						shopName: "居家",
						shopGather: [
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/4dafc90ab96af8c7f7ceeb2896f2212a.png",
								shopName: "简约钟表",
								monthNum: 4,
								reputation: 98,
								price: 2,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/404c8206706344a557fea0353a654c83.png",
								shopName: "背枕",
								monthNum: 213,
								reputation: 99,
								price: 56.85,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/469cd4b31a8ee89d5982e50feaad7207.png",
								shopName: "收纳柜子",
								monthNum: 789,
								reputation: 90,
								price: 23.9,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/b95b86907a55dd7ee97baf154af16a79.png",
								shopName: "创可贴",
								monthNum: 12,
								reputation: 85,
								price: 125,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/06/01/e3460c39473756c582031e248f3ea1c9.jpg",
								shopName: "床品四件套",
								monthNum: 1211,
								reputation: 99,
								price: 99.00,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/06/01/d6634a4a9ba98cf25c36cbfec3f6e4df.png",
								shopName: "按摩椅",
								monthNum: 78,
								reputation: 95,
								price: 2998.00,
							,
						]
					,
					
						shopName: "配件装饰",
						shopGather: [
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/f9e64699f2b30840926558f7e6fef5b7.png",
								shopName: "蓝宝石项链",
								monthNum: 4871,
								reputation: 99,
								price: 899,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/04ff245798456499336ab2ef6dd833ec.png",
								shopName: "眼镜框(无度数)",
								monthNum: 10214,
								reputation: 97,
								price: 9.9,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/1917c4b6918dabe384a0c17b8ef613b0.png",
								shopName: "腰带",
								monthNum: 4561,
								reputation: 99,
								price: 78,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/7bdf83cc4a65fb6e201fb7af34e77efb.png",
								shopName: "袜子",
								monthNum: 13541,
								reputation: 100,
								price: 9.9,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/06/01/7a6e5b5227cb606c48a097d712d4ee2f.png",
								shopName: "行李箱",
								monthNum: 7841,
								reputation: 98,
								price: 299,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/06/01/d3d0a300076c3e8337bca84dc2dfd496.png",
								shopName: "钱包小皮件",
								monthNum: 798,
								reputation: 96,
								price: 39.99,
							
						]
					,
					
						shopName: "服装",
						shopGather: [
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/534467788da6d2b479291913564b9c76.png",
								shopName: "男士外套",
								monthNum: 484,
								reputation: 100,
								price: 129.99,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/7878107c86fdd36ee7c584d9a5966bdc.png",
								shopName: "女士外套",
								monthNum: 467,
								reputation: 98,
								price: 199.99,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/ec6e0e01c5b341401b2a910838f3d456.png",
								shopName: "王女士裙装",
								monthNum: 5641,
								reputation: 100,
								price: 56.9,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/06/01/8f101426deb15865773eedf2cea6c091.png",
								shopName: "衬衫",
								monthNum: 7845,
								reputation: 99,
								price: 45.9,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/06/01/718233411b1cb6ac7963bc33d2949890.png",
								shopName: "T恤",
								monthNum: 89742,
								reputation: 99,
								price: 29.9,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otnUsg.png",
								shopName: "面包服",
								monthNum: 8874,
								reputation: 99,
								price: 119.9,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otnHSK.png",
								shopName: "男士毛衣",
								monthNum: 79841,
								reputation: 100,
								price: 59.9,
							
						]
					,
					
						shopName: "数码电器",
						shopGather: [
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/f8f0d693f57dc2d57a664247d873011d.png",
								shopName: "苹果x",
								monthNum: 89754,
								reputation: 98,
								price: 2999.99,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/1994edeebab2bc9b764d9a4b2d7a37c6.png",
								shopName: "耳机",
								monthNum: 48674,
								reputation: 100,
								price: 29.99,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/f6e21e142cba3231b093a872f6b0f4d5.png",
								shopName: "电动牙刷",
								monthNum: 4649,
								reputation: 99,
								price: 29.99,
							,
							
								shopImgUrl: "https://cdn.it120.cc/apifactory/2018/11/07/96c0bf18a79bb36b7cdab03d821f917f.png",
								shopName: "九阳豆浆机",
								monthNum: 7841,
								reputation: 100,
								price: 599.99,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otuKpV.png",
								shopName: "手机支架",
								monthNum: 58548,
								reputation: 98,
								price: 2.9,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otu0XD.png",
								shopName: "鼠标",
								monthNum: 102145,
								reputation: 100,
								price: 29.99,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otu7As.png",
								shopName: "键盘",
								monthNum: 4814,
								reputation: 99,
								price: 252.99,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otKmHH.png",
								shopName: "手机壳",
								monthNum: 78451,
								reputation: 100,
								price: 9.9,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otM2y8.png",
								shopName: "数码相机",
								monthNum: 789,
								reputation: 100,
								price: 8599,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otMXmF.png",
								shopName: "笔记本电脑",
								monthNum: 1145,
								reputation: 95,
								price: 10999,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otQVTH.png",
								shopName: "充电器",
								monthNum: 914,
								reputation: 89,
								price: 89.9,
							,
							
								shopImgUrl: "https://z3.ax1x.com/2021/12/02/otQ80g.png",
								shopName: "充电宝",
								monthNum: 8489,
								reputation: 99,
								price: 99.9,
							,
						]
					
				]
			;
		,
		mounted() 
			this.initializeRoll(); //滑动初始化方法
			this.initializeOwn(); //初始化rightSide方法
		,
		//计算属性
		computed: 
			// 计算出当前分类的下标
			currentIndex() 
				const 
					scrollY,
					rightSide
				 = this; //拿到每次滑动的值以及每一个分类的下标值
				console.log('滚动的值及每一个分类的下标值...', this)
				//findIndex() 方法返回传入一个测试条件(函数)符合条件的数组第一个元素位置
				//获取数组rightSide中每一个下标值并筛选条件返回第一个元素索引位置
				const index = rightSide.findIndex((top, index) => 
					// scrollY>=当前top && scrollY<下一个top
					return scrollY >= top && scrollY < rightSide[index + 1];
				);
				// 返回结果
				return index;
			
		,
		methods: 
			// 初始化滚动
			initializeRoll() 
				// new一个类的实例,前提必须确保父元素和子元素的内容已经正确渲染了,不然不会生效
				new BScroll(".leftNav", 
					click: true
				);
				// 组件实例上挂属性
				this.foodsScroll = new BScroll(".rightContant", 
					probeType: 2, // 因为惯性滑动不会触发
					click: true
				);

				// 给右侧列表绑定scroll监听
				this.foodsScroll.on("scroll", (
					x,
					y
				) => 
					this.scrollY = Math.abs(y);
				);
				// 给右侧列表绑定scroll结束的监听
				this.foodsScroll.on("scrollEnd", (
					x,
					y
				) => 
					console.log("操作结束的下标值" + x, y);
					this.scrollY = Math.abs(y);
				);
			,
			// 初始化rightSide
			initializeOwn() 
				// 初始化rightSide
				const rightSide = [];
				let top = 0;
				rightSide.push(top);
				// 找到所有分类下的li
				const lis = this.$refs.shopContant.getElementsByClassName("eventList"); //获取dom元素lii(eventList),对其进行操作
				// slice() 方法返回一个新的数组对象
				Array.prototype.slice.call(lis).forEach(li => 
					top += li.clientHeight; //相当于top = top + li.clientHeight
					rightSide.push(top);
				);

				//更新数据
				this.rightSide = rightSide;
				console.log("每一个分类的下标" + rightSide);
			,
			//左侧点击事件
			onClickNav(index) 
				console.log(index);
				//拿到目标位置的scrollY,点击左侧导航,右侧列表滑动到对应的位置
				const scrollY = this.rightSide[index];
				// 点击的分类成为当前分类,索引当前选中的导航标题
				this.scrollY = scrollY;
				// 平滑滑动右侧列表
				this.foodsScroll.scrollTo(0, -scrollY, 1000);
			
		
	;
</script>
<style scoped>
	.commodity 
		/* 最大的盒子样式 */
		display: flex;
		position: fixed;
		top: 0px;
		bottom: 0px;
		width: 100%;
		background: #fff;
		overflow: hidden;
	

	.leftNav 
		/* 左侧大盒子的整体样式 */
		width: 80px;
		background: rgb(248, 248, 248);
	

	.typeStyle 
		/* 左侧导航选中的样式 */
		background: #fff;
		font-weight: bold;
		display: flex;
		align-items: center;
		color: rgb(255, 94, 121);
		justify-content: center;
		border-left: 2px solid rgb(255, 94, 121);
	

	.leftTit 
		/* 左侧导航标题默认样式 */
		display: flex;
		height: 40px;
		justify-content: center;
		font-size: 12px;
		align-items: center;
	

	.rightContant 
		/* 右侧大盒子的整体样式 */
		flex: 1;
	

	.rightTtitle 
		/* 右侧标题样式 */
		padding-left: 12px;
		height: 26px;
		line-height: 26px;
		font-size: 12px;
		font-weight: bold;
		color: rgb(147, 153, 159);
		background: rgb(248, 248, 248);
		margin: 0;
	

	.gather 
		/* 右侧每一个商品的样式 */
		display: flex;
		margin: 16px;
		display: flex;
		align-items: center;
	

	.distance 
		/* 右侧图片与描述间距 */
		padding-left: 6px;
	

	.gather img 
		/* 右侧图片样式 */
		width: 60px;
		height: 60px;
		vertical-align: middle;
	

	:last-child 
		/* 点击左侧导航右侧内容与左边对齐 */
		margin-bottom: 0;
	

	.shopName 
		/* 右侧商品标题字体大小 */
		font-size: 14px;
	

	.saleGood 
		/* 右侧月售好评样式 */
		font-size: 初试  vue2.0——9.项目开发_better-scroll 实现移动端滑动2

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