<template>
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<view class="u-wrap">
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<view class="u-search-box">
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<view class="u-search-inner">
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<up-icon name="search" color="#909399" :size="28"></up-icon>
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<text class="u-search-text">搜索uview-plus</text>
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</view>
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</view>
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<view class="u-menu-wrap">
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<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop">
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<view v-for="(item,index) in tabbar" :key="index" class="u-tab-item" :class="[current==index ? 'u-tab-item-active' : '']"
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:data-current="index" @tap.stop="swichMenu(index)">
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<text class="u-line-1">{{item.name}}</text>
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</view>
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</scroll-view>
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<block v-for="(item,index) in tabbar" :key="index">
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<scroll-view scroll-y class="right-box" v-if="current==index">
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<view class="page-view">
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<view class="class-item">
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<view class="item-title">
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<text>{{item.name}}</text>
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</view>
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<view class="item-container">
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<view class="thumb-box" v-for="(item1, index1) in item.foods" :key="index1">
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<image class="item-menu-image" :src="item1.icon" mode=""></image>
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<view class="item-menu-name">{{item1.name}}</view>
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</view>
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</view>
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</view>
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</view>
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</scroll-view>
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</block>
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</view>
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</view>
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</template>
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<script>
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import classifyData from "@/common/classify.data.js";
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export default {
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data() {
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return {
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tabbar: classifyData,
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scrollTop: 0, //tab标题的滚动条位置
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current: 0, // 预设当前项的值
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menuHeight: 0, // 左边菜单的高度
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menuItemHeight: 0, // 左边菜单item的高度
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}
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},
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computed: {
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},
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methods: {
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getImg() {
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return Math.floor(Math.random() * 35);
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},
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// 点击左边的栏目切换
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async swichMenu(index) {
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if(index == this.current) return ;
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this.current = index;
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// 如果为0，意味着尚未初始化
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if(this.menuHeight == 0 || this.menuItemHeight == 0) {
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await this.getElRect('menu-scroll-view', 'menuHeight');
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await this.getElRect('u-tab-item', 'menuItemHeight');
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}
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// 将菜单菜单活动item垂直居中
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this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
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},
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// 获取一个目标元素的高度
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getElRect(elClass, dataVal) {
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new Promise((resolve, reject) => {
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const query = uni.createSelectorQuery().in(this);
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query.select('.' + elClass).fields({size: true},res => {
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// 如果节点尚未生成，res值为null，循环调用执行
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if(!res) {
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setTimeout(() => {
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this.getElRect(elClass);
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}, 10);
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return ;
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}
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this[dataVal] = res.height;
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}).exec();
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})
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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.u-wrap {
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height: calc(100vh);
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/* #ifdef H5 */
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height: calc(100vh - var(--window-top));
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/* #endif */
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display: flex;
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flex-direction: column;
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}
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.u-search-box {
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padding: 18rpx 30rpx;
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}
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.u-menu-wrap {
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flex: 1;
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display: flex;
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overflow: hidden;
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}
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.u-search-inner {
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background-color: rgb(234, 234, 234);
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border-radius: 100rpx;
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display: flex;
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align-items: center;
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padding: 10rpx 16rpx;
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}
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.u-search-text {
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font-size: 26rpx;
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color: $u-tips-color;
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margin-left: 10rpx;
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}
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.u-tab-view {
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width: 200rpx;
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height: 100%;
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}
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.u-tab-item {
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height: 110rpx;
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background: #f6f6f6;
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box-sizing: border-box;
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display: flex;
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align-items: center;
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justify-content: center;
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font-size: 26rpx;
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color: #444;
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font-weight: 400;
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line-height: 1;
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}
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.u-tab-item-active {
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position: relative;
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color: #000;
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font-size: 30rpx;
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font-weight: 600;
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background: #fff;
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}
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.u-tab-item-active::before {
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content: "";
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position: absolute;
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border-left: 4px solid $u-primary;
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height: 32rpx;
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left: 0;
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top: 39rpx;
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}
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.u-tab-view {
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height: 100%;
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}
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.right-box {
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background-color: rgb(250, 250, 250);
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}
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.page-view {
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padding: 16rpx;
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}
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.class-item {
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margin-bottom: 30rpx;
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background-color: #fff;
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padding: 16rpx;
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border-radius: 8rpx;
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}
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.item-title {
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font-size: 26rpx;
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color: $u-main-color;
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font-weight: bold;
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}
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.item-menu-name {
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font-weight: normal;
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font-size: 24rpx;
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color: $u-main-color;
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}
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.item-container {
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display: flex;
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flex-wrap: wrap;
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}
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.thumb-box {
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width: 33.333333%;
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display: flex;
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align-items: center;
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justify-content: center;
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flex-direction: column;
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margin-top: 20rpx;
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}
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.item-menu-image {
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width: 120rpx;
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height: 120rpx;
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}
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</style>
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