uview-plus3.0重磅发布，全面的Vue3移动组件库
该插件使用的vue2写法，但支持vue3引用，在此基础上修改为uni-app+vue3+vite;
<template><view class="u-wrap mainClass"><!-- <back-header :title="pageTitle" :back-text="backText"></back-header> --><view class="u-search-box"><view class="u-search-inner"><u-icon name="search" color="#909399" :size="28"></u-icon><text class="u-search-text">搜索</text></view></view><view class="u-menu-wrap"><scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop":scroll-into-view="itemId"><view v-for="(item,index) in tabbar" :key="index" class="u-tab-item":class="[current == index ? 'u-tab-item-active' : '']" @tap.stop="swichMenu(index)"><text class="u-line-1">{{item.name}}</text></view></scroll-view><scroll-view :scroll-top="scrollRightTop" scroll-y scroll-with-animation class="right-box"@scroll="rightScroll"><view class="page-view"><view class="class-item" :id="'item' + index" v-for="(item , index) in tabbar" :key="index"><view class="item-title"><text>{{item.name}}</text></view><view class="item-container"><view class="thumb-box" v-for="(item1, index1) in item.foods" :key="index1"><image class="item-menu-image" :src="item1.icon" mode=""></image><view class="item-menu-name">{{item1.name}}</view></view></view></view></view></scroll-view></view></view> </template> <script lang="ts" setup>// import BackHeader from '../../../components/publicNavbar.vue';import { defineComponent, ref, onMounted, onBeforeUnmount, getCurrentInstance } from 'vue';import classifyData from '@/common/classify.data.js';const scrollTop = ref(0);const oldScrollTop = ref(0);const current = ref(0);const menuHeight = ref(0);const menuItemHeight = ref(0);const itemId = ref('');const tabbar = classifyData;const menuItemPos = ref([]);const arr = ref([]);const scrollRightTop = ref(0);let timer : NodeJS.Timeout | null = null;const pageTitle = ref('商品')const backText = ref('')const instance = getCurrentInstance();onMounted(() => {getMenuItemTop();});const swichMenu = async (index : number) => {if (arr.value.length === 0) {await getMenuItemTop();}if (index === current.value) return;scrollRightTop.value = oldScrollTop.value;// 异步更新后使用 nextTick 确保能够正确获取最新的 DOMawait new Promise<void>((resolve) => {setTimeout(() => {scrollRightTop.value = arr.value[index];current.value = index;leftMenuStatus(index);resolve();}, 0);});};const getElRect = (elClass : string, dataVal : string) => {const query = uni.createSelectorQuery().in(instance);query.select('.' + elClass).boundingClientRect((res) => {if (!res) {setTimeout(() => {getElRect(elClass, dataVal);}, 10);return;}instance.ctx[dataVal] = res.height;}).exec();};const observer = () => {tabbar.forEach((val, index) => {let observer = uni.createIntersectionObserver(this);observer.relativeTo('.right-box', { top: 0 }).observe('#item' + index, (res) => {if (res.intersectionRatio > 0) {let id = Number(res.id.substring(4));leftMenuStatus(id);}});});};const leftMenuStatus = (index : number) => {current.value = index;if (menuHeight.value == 0 || menuItemHeight.value == 0) {getElRect('menu-scroll-view', 'menuHeight');getElRect('u-tab-item', 'menuItemHeight');}scrollTop.value = index * menuItemHeight.value + menuItemHeight.value / 2 - menuHeight.value / 2;};const getMenuItemTop = () => {let selectorQuery = uni.createSelectorQuery();selectorQuery.selectAll('.class-item').boundingClientRect((rects) => {if (!rects.length) {setTimeout(() => {getMenuItemTop();}, 10);return;}rects.forEach((rect, index) => {arr.value.push(rect.top - rects[0].top);});}).exec();};const rightScroll = async (e : any) => {oldScrollTop.value = e.detail.scrollTop;if (arr.value.length === 0) {await getMenuItemTop();}if (timer) return;if (!menuHeight.value) {getElRect('menu-scroll-view', 'menuHeight');}setTimeout(() => {timer = null;let scrollHeight = e.detail.scrollTop + menuHeight.value / 2;for (let i = 0; i < arr.value.length; i++) {let height1 = arr.value[i];let height2 = arr.value[i + 1];if (!height2 || (scrollHeight >= height1 && scrollHeight < height2)) {leftMenuStatus(i);return;}}}, 10);};onBeforeUnmount(() => {if (timer) clearTimeout(timer);}); </script><style lang="scss" scoped>.u-wrap {height: calc(100vh);/* #ifdef H5 */height: calc(100vh - var(--window-top));/* #endif */display: flex;flex-direction: column;}.u-search-box {padding: 18rpx 30rpx;}.u-menu-wrap {flex: 1;display: flex;overflow: hidden;}.u-search-inner {background-color: rgb(234, 234, 234);border-radius: 100rpx;display: flex;align-items: center;padding: 10rpx 16rpx;}.u-search-text {font-size: 26rpx;color: $u-tips-color;margin-left: 10rpx;}.u-tab-view {width: 200rpx;height: 100%;}.u-tab-item {height: 110rpx;background: #f6f6f6;box-sizing: border-box;display: flex;align-items: center;justify-content: center;font-size: 26rpx;color: #444;font-weight: 400;line-height: 1;}.u-tab-item-active {position: relative;color: #000;font-size: 30rpx;font-weight: 600;background: #fff;}.u-tab-item-active::before {content: "";position: absolute;border-left: 4px solid $u-primary;height: 32rpx;left: 0;top: 39rpx;}.u-tab-view {height: 100%;}.right-box {background-color: rgb(250, 250, 250);}.page-view {padding: 16rpx;}.class-item {margin-bottom: 30rpx;background-color: #fff;padding: 16rpx;border-radius: 8rpx;}.class-item:last-child {min-height: 100vh;}.item-title {font-size: 26rpx;color: $u-main-color;font-weight: bold;}.item-menu-name {font-weight: normal;font-size: 24rpx;color: $u-main-color;}.item-container {display: flex;flex-wrap: wrap;}.thumb-box {width: 33.333333%;display: flex;align-items: center;justify-content: center;flex-direction: column;margin-top: 20rpx;}.item-menu-image {width: 120rpx;height: 120rpx;} </style>
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