uni-app制作小程序实现左右菜单联动效果

// 左侧列表菜单的点击事件
			changeIndex(index) {
				this.currentIndex = index;
				this.rightScrollinto = 'tab' + index;
				if (this.currentIndex < 6) {
					this.rightScrollinto = "tab0"
				}
			 this.leftScrollinto = 'left' + index;
 
			},

	// 获取右侧滑动区域每一个子区域的高度
			getTop() {
				const query = uni.createSelectorQuery().in(this);
				query.selectAll('.demo3').boundingClientRect(data => {
					// console.log("得到布局位置信息" + JSON.stringify(data));
					// console.log("节点离页面顶部的距离为" + data.top);
					if (data) {
						data.map((item, index) => {
							let top = index > 0 ? this.topList[index - 1] : 0;
							top += item.height;
							this.topList.push(top);
						})
					}
					console.log(this.topList);
				}).exec();
			},
			//右侧滑动区域的滑动事件
			rightscroll(event) {
				// console.log(event.target.scrollTop)
				let scrollTop = event.target.scrollTop
				let result = this.topList.findIndex((item,index)=>{
				   return 	 scrollTop<=item
				})
				this.currentIndex = result;
				// this.changeIndex();
			}
		},

	<!-- 左侧列表栏区域 s-->
		<view class="uni-padding-wrap uni-common-mt">
			<view class="d-flex">
				<scroll-view scroll-with-animation :scroll-top="scrollTop" 
				scroll-y="true" class="scroll-Y left-scroll"
					:scroll-into-view="rightScrollinto">
					<view @click="changeIndex(index)"  :id="'tab'+index" 
					v-for="(item,index) in listName" :key="item.id"
						:class="currentIndex == index?'active-class':''">
						{{item.name}}
					</view>
				</scroll-view>
				<scroll-view @scroll="rightscroll" scroll-with-animation :style="'height:'+scrollH+'px'"
					:scroll-top="scrollTop" scroll-y="true" class="scroll-Y right-scroll"
					:scroll-into-view="leftScrollinto">
					<view   :id="'left'+bindex" v-for="(bitem,bindex) in listName" :key="bindex" class="d-flex flex-wrap demo3">
						<view  v-for="(childItem, Aindex) in bitem.app_category_items" :key="childItem.id"
							class=" demo2 scroll-view-item uni-bg-red  demo2">
							<view class="img">
								<image :src="childItem.cover" mode="scaleToFill"></image>
							</view>
							<view class="text">
								<text>{{childItem.name}}</text>
							</view>
						</view>
					</view>
 
				</scroll-view>
			</view>
		</view>

.left-scroll {
		width: 30%;
		background: #f4f4f4;
		text-align: center;
	}
	.left-scroll view {
		height: 120rpx;
		line-height: 120rpx;
	}
 
	.right-scroll {
		width: 70%;
	}
 
	.right-scroll .demo2 {
		width: 33%;
		text-align:center;
		margin-top:0;
	}
	image {
		width: 120rpx;
		height: 120rpx;
	}
	.active-class {
		color: orange;
		background: white;
		border-top-right-radius: 10rpx;
		border-bottom-right-radius: 10rpx;
	}

 <script>
	import {
		getCate
	} from '../../api/cate.js';
	export default {
		data() {
			return {
				currentIndex: 0,
				listName: [],
				scrollH: 0,
				// 表明左右两侧滑动的标志scroll-into-view
				rightScrollinto: '',
				leftScrollinto: '',
				// 用一个数组承载每一个子区块的距离顶部的高度
				topList: [],
 
			}
		},
		mounted() {
			this.getCate();
			// 使用定时器获取区块节点信息
			setTimeout(() => {
				this.getTop();
			}, 500)
		},
		onLoad() {
			// 异步获取系统信息，包括屏幕高度等
			uni.getSystemInfo({
				success: (res) => {
					console.log(res);
					// #ifdef MP
					this.scrollH = res.windowHeight - uni.upx2px(88)
					// #endif
				}
			});
 
		},
		methods: {
			// 调用获取分类页数据的方法
			getCate() {
				getCate().then((response) => {
					console.log(response)
					this.listName = response.data
				})
			},
			// 左侧列表菜单的点击事件
			changeIndex(index) {
				this.currentIndex = index;
				this.rightScrollinto = 'tab' + index;
				if (this.currentIndex < 6) {
					this.rightScrollinto = "tab0"
				}
			 this.leftScrollinto = 'left' + index;
 
			},
			// 获取右侧滑动区域每一个子区域的高度
			getTop() {
				const query = uni.createSelectorQuery().in(this);
				query.selectAll('.demo3').boundingClientRect(data => {
					// console.log("得到布局位置信息" + JSON.stringify(data));
					// console.log("节点离页面顶部的距离为" + data.top);
					if (data) {
						data.map((item, index) => {
							let top = index > 0 ? this.topList[index - 1] : 0;
							top += item.height;
							this.topList.push(top);
						})
					}
					console.log(this.topList);
				}).exec();
			},
			//右侧滑动区域的滑动事件
			rightscroll(event) {
				// console.log(event.target.scrollTop)
				let scrollTop = event.target.scrollTop
				let result = this.topList.findIndex((item,index)=>{
				   return 	 scrollTop<=item
				})
				this.currentIndex = result;
				// this.changeIndex();
			}
		},
 
	}
</script>