vue左右联动_vue实现左侧目录和右边内容联动

作者：空白诗007 | 2024-07-28 02:51:32
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vue实现左侧目录和右边内容联动

> **<template>
	<div>
		<div class="nmc-content">
			<div class="nmc-wrapper">
				<div class="left" ref="scrollLeft">
					<div v-for="(item, index) in arr" :key="index" ref='leftBox' @click="changeModel(index)"
						:class="[current==index?'active flex-one':'common flex-one']">
						{{item.name}}
					</div>
				</div>
				<div class="right" ref="scroll" @scroll="handleScroll">
					<div class="main-content" v-for="(item, index) in arr" :key="index">
						<div class="top-title" ref="rightTit">{{item.name}}</div>
						<div class="bottom-content">
							<ul class="bottom-ul" v-if="item.list">
								<li class="bottom-item" v-for="(item1, index1) in item.list" :key="index1">
									<img src="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fc-ssl.duitang.com%2Fuploads%2Fitem%2F202103%2F09%2F20210309094501_jfyix.thumb.1000_0.jpg&refer=http%3A%2F%2Fc-ssl.duitang.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1675911945&t=14dcf3ffd9b9884f4accc0941ed6f140"
										alt="" />
									<div>{{item1.name}}</div>
								</li>
							</ul>
						</div>
					</div>
				</div>
			</div>
		</div>
		<TabBar></TabBar>
	</div>
</template>
<script>
	import TabBar from '../components/TabBar.vue'
	export default {
		data() {
			return {
				leftClickFlag: false,
				arr: [{
						name: "分类1",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类2",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类3",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类4",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类5",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类6",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类7",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类8",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类9",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类10",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
					{
						name: "分类11",
						list: [{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
							{
								name: "二级"
							},
						],
					},
				],
				current: 0,
				listHeight: [],
				scrollY: 0,
			};
		},
		components: {
			TabBar
		},
		mounted() {
			this.$nextTick(() => {
				this.getBoxHeight();
				this.current = 0;
				this.changeModel(0);
			});
		},
		methods: {
			getBoxHeight() {
				setTimeout(() => {
					//延时计算元素的宽度
					let rightItems =
						this.$refs.scroll.getElementsByClassName("main-content"); //获取指定类名的所有元素
					let height = 0;
					this.listHeight.push(height);
					for (let i = 0; i < rightItems.length; i++) {
						let item = rightItems[i]; // 右边的每一个模块（蓝色标题 + 标题下面所带的内容）
						height += item.clientHeight;
						this.listHeight.push(height); // 把右边模块内容的高度全都放到一个数组中
					}
					this.arr.forEach((item, index) => {
						// 把上面弄的那些高度分别放入总数据中，方便点击左边让右边滚动到所对应的模块
						this.$set(item, "distance", this.listHeight[index]);
						// this.$set  
						// 向响应式对象中添加一个属性，
						// 并确保这个新属性同样是响应式的，
						// 且触发视图更新。
						// 它必须用于向响应式对象上添加新属性
						// 调用方法：this.$set( target, key, value )
						// target：要更改的数据源(可以是对象或者数组)
						// key：要更改的具体数据
						// value ：重新赋的值
					});
				}, 1000); //增加延时，等图片渲染完毕后进行计算
			},
			changeModel(index) {
				if (index == 0) {
					this.$refs.scroll.scrollTop = 0;
				} else {
					this.$refs.scroll.scrollTop = this.arr[index].distance;
				}
				this.current = index;
				let jumpitem = this.$refs.scroll.getElementsByClassName("main-content")
				jumpitem[index].scrollIntoView({
					behavior: 'smooth',
					block: 'start'
				})
				this.leftClickFlag = true;
			},
			// 左侧滚动
			handleScrollLeft() {
				let leftHeight = this.$refs.leftBox[0].clientHeight;
				let height = (this.current - 6) * leftHeight;
				if (this.current > 6) {
					this.$refs.scrollTop += height;
				}
				if (this.current <= 6) {
					this.$refs.scrollTop = 0;
				}
			},
			// 滚动时触发
			handleScroll() {
				this.scrollY = this.$refs.scroll.scrollTop; // 先获取滚动元素的scrollTop，主要用它来进行判断
				if (this.scrollY < this.arr[1].distance) {
					this.current = 0;
				} else {
					for (let i = 0; i < this.listHeight.length; i++) {
						let start = this.listHeight[i + 1]; // 右边模块内容的高度
						let end = this.listHeight[i + 2]; // 右边模块内容的高度 加上 右边模块标题的高度
						if (this.scrollY >= start && this.scrollY < end) {
							if (this.leftClickFlag == false) {
								//如果右侧数据过少，不触发右侧滚动
								this.current = i + 1;
							}
							if (this.leftClickFlag) {
								//设置完之后立马重置，右侧滚动触发左侧
								this.leftClickFlag = false;
							}
							this.handleScrollLeft();
							return;
						}
					}
				}
			},
		},
	};
</script>
<style lang='scss' scoped>
	.flex-one {
		display: flex;
		justify-content: center;
		align-content: center;
	}
	.nmc-content {
		background: #f4f5f6;
		padding: 0.6rem 0 0 0;
		.nmc-wrapper {
			width: 100%;
			height: calc(100vh - 0.6rem);
			display: flex;
			.left {
				width: 4.5rem;
				// height: 100%;
				overflow-y: auto;
				-webkit-overflow-scrolling: touch;
				color: #333333;
				&::-webkit-scrollbar {
					display: none;
					/* Chrome Safari */
				}
				>div {
					font-size: 0.7rem;
					font-weight: 500;
					width: 4.5rem;
					height: 2.5rem;
					position: relative;
					.top {
						position: absolute;
						top: -0.5rem;
						right: 0;
						width: 0.5rem;
						height: 0.5rem;
						background: white;
					}
					.bottom {
						position: absolute;
						top: 2.5rem;
						right: 0;
						width: 0.5rem;
						height: 0.5rem;
						background: white;
					}
				}
				.active {
					background: #ffffff;
					background: white;
					color: #333333;
					display: flex;
					align-items: center;
					border-radius: 0;
					&::before {
						width: 0.25rem;
						height: 1.55rem;
						background: #363636;
						content: '';
						position: absolute;
						top: 0.55rem;
						left: 0;
					}
					.line {
						width: 0.15rem;
						height: 0.75rem;
						object-fit: cover;
						margin: 0 0.5rem 0 0;
					}
				}
				.common {
					color: #666666;
					line-height: 2.5rem;
				}
			}
			.right {
				background: white;
				position: relative;
				flex: 1;
				width: 100%;
				height: 100%;
				background: #fff;
				overflow-y: auto;
				-webkit-overflow-scrolling: touch;
				padding: 0.5rem;
				.main-content {
					position: relative;
					width: 100%;
					.top-title {
						height: 2rem;
						text-align: left;
						line-height: 2rem;
						font-size: 0.65rem;
						font-weight: 500;
						color: #333333;
					}
					.bottom-content {
						// display: flex;
						// flex-wrap: wrap;
						// min-height: 17rem;
						// margin: 0 0.5rem;
						.bottom-ul {
							width: 100%;
							display: flex;
							flex-wrap: wrap;
							.bottom-item {
								width: 33.33%;
								// height: 5rem;
								display: flex;
								flex-direction: column;
								align-items: center;
								margin: 0 0 0.5rem 0;
								position: relative;
								>img:first-child {
									width: 2.5rem;
									height: 2.5rem;
									// border: 0.025rem solid #f2f2f2;
									border-radius: 0.25rem;
									object-fit: cover;
									box-shadow: 0rem 0.08rem 0.15rem 0.08rem rgba(194, 146, 108, 0.1);
								}
							}
						}
					}
				}
			}
		}
	}
</style>**


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