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add: 新增cate-tab垂直分类组件
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jry committed Dec 10, 2024
1 parent 04e9c16 commit 4ea65ba
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313 changes: 313 additions & 0 deletions src/uni_modules/uview-plus/components/u-cate-tab/u-cate-tab.vue
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<template>
<view class="u-cate-tab">
<view class="u-cate-tab__wrap">
<scroll-view class="u-cate-tab__view u-cate-tab__menu-scroll-view"
scroll-y scroll-with-animation :scroll-top="scrollTop"
:scroll-into-view="itemId">
<view v-for="(item, index) in tabList" :key="index" class="u-cate-tab__item"
:class="[current == index ? 'u-cate-tab__item-active' : '']"
@tap.stop="swichMenu(index)">
<slot name="tabItem" :item="item">
<text class="u-line-1">{{item[tabKeyName]}}</text>
</slot>
</view>
</scroll-view>
<scroll-view :scroll-top="scrollRightTop" scroll-y scroll-with-animation class="u-cate-tab__right-box" @scroll="rightScroll">
<view class="u-cate-tab__page-view">
<view class="u-cate-tab__page-item" :id="'item' + index" v-for="(item , index) in tabList" :key="index">
<slot name="itemList" :item="item">
<view class="item-title">
<text>{{item[tabKeyName]}}</text>
</view>
<view class="item-container">
<template v-for="(item1, index1) in item.children" :key="index1">
<slot name="pageItem" :pageItem="item1">
<view class="thumb-box" >
<image class="item-menu-image" :src="item1.icon" mode=""></image>
<view class="item-menu-name">{{item1[itemKeyName]}}</view>
</view>
</slot>
</template>
</view>
</slot>
</view>
</view>
</scroll-view>
</view>
</view>
</template>
<script>
export default {
props: {
tabList: {
type: Array,
default: () => {
return []
}
},
tabKeyName: {
type: String,
default: 'name'
},
itemKeyName: {
type: String,
default: 'name'
}
},
watch: {
tabList() {
this.getMenuItemTop()
}
},
data() {
return {
scrollTop: 0, //tab标题的滚动条位置
oldScrollTop: 0,
current: 0, // 预设当前项的值
menuHeight: 0, // 左边菜单的高度
menuItemHeight: 0, // 左边菜单item的高度
itemId: '', // 栏目右边scroll-view用于滚动的id
menuItemPos: [],
rects: [],
arr: [],
scrollRightTop: 0, // 右边栏目scroll-view的滚动条高度
timer: null, // 定时器
}
},
onMounted() {
this.getMenuItemTop()
},
methods: {
// 点击左边的栏目切换
async swichMenu(index) {
if(this.arr.length == 0) {
await this.getMenuItemTop();
}
if (index == this.current) return;
this.scrollRightTop = this.oldScrollTop;
this.$nextTick(function(){
this.scrollRightTop = this.arr[index];
this.current = index;
this.leftMenuStatus(index);
})
},
// 获取一个目标元素的高度
getElRect(elClass, dataVal) {
new Promise((resolve, reject) => {
const query = uni.createSelectorQuery().in(this);
query.select('.' + elClass).fields({
size: true
}, res => {
// 如果节点尚未生成，res值为null，循环调用执行
if (!res) {
setTimeout(() => {
this.getElRect(elClass);
}, 10);
return;
}
this[dataVal] = res.height;
resolve();
}).exec();
})
},
// 观测元素相交状态
async observer() {
this.tabList.map((val, index) => {
let observer = uni.createIntersectionObserver(this);
// 检测右边scroll-view的id为itemxx的元素与u-cate-tab__right-box的相交状态
// 如果跟.u-cate-tab__right-box底部相交，就动态设置左边栏目的活动状态
observer.relativeTo('.u-cate-tab__right-box', {
top: 0
}).observe('#item' + index, res => {
if (res.intersectionRatio > 0) {
let id = res.id.substring(4);
this.leftMenuStatus(id);
}
})
})
},
// 设置左边菜单的滚动状态
async leftMenuStatus(index) {
this.current = index;
// 如果为0，意味着尚未初始化
if (this.menuHeight == 0 || this.menuItemHeight == 0) {
await this.getElRect('u-cate-tab__menu-scroll-view', 'menuHeight');
await this.getElRect('u-cate-tab__item', 'menuItemHeight');
}
// 将菜单活动item垂直居中
this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
},
// 获取右边菜单每个item到顶部的距离
getMenuItemTop() {
new Promise(resolve => {
let selectorQuery = uni.createSelectorQuery();
selectorQuery.selectAll('.u-cate-tab__page-item').boundingClientRect((rects) => {
// 如果节点尚未生成，rects值为[](因为用selectAll，所以返回的是数组)，循环调用执行
if(!rects.length) {
setTimeout(() => {
this.getMenuItemTop();
}, 10);
return ;
}
this.rects = rects;
rects.forEach((rect) => {
// 这里减去rects[0].top，是因为第一项顶部可能不是贴到导航栏(比如有个搜索框的情况)
this.arr.push(rect.top - rects[0].top);
resolve();
})
}).exec()
})
},
// 右边菜单滚动
async rightScroll(e) {
this.oldScrollTop = e.detail.scrollTop;
// console.log(e.detail.scrollTop)
// console.log(JSON.stringify(this.arr))
if(this.arr.length == 0) {
await this.getMenuItemTop();
}
if(this.timer) return ;
if(!this.menuHeight) {
await this.getElRect('u-cate-tab__menu-scroll-view', 'menuHeight');
}
setTimeout(() => { // 节流
this.timer = null;
// scrollHeight为右边菜单垂直中点位置
let scrollHeight = e.detail.scrollTop + 1;
// console.log(e.detail.scrollTop)
for (let i = 0; i < this.arr.length; i++) {
let height1 = this.arr[i];
let height2 = this.arr[i + 1];
// console.log('i', i)
// console.log('height1', height1)
// console.log('height2', height2)
// 如果不存在height2，意味着数据循环已经到了最后一个，设置左边菜单为最后一项即可
if (!height2 || scrollHeight >= height1 && scrollHeight <= height2) {
// console.log('scrollHeight', scrollHeight)
// console.log('height1', height1)
// console.log('height2', height2)
this.leftMenuStatus(i);
return ;
}
}
}, 10)
}
}
}
</script>

<style lang="scss" scoped>
.u-cate-tab {
display: flex;
flex-direction: column;
}
.u-cate-tab__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-cate-tab__view {
width: 200rpx;
height: 100%;
}
.u-cate-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-cate-tab__item-active {
position: relative;
color: #000;
font-size: 30rpx;
font-weight: 600;
background: #fff;
}
.u-cate-tab__item-active::before {
content: "";
position: absolute;
border-left: 4px solid $u-primary;
height: 32rpx;
left: 0;
top: 39rpx;
}
.u-cate-tab__view {
height: 100%;
}
.u-cate-tab__right-box {
background-color: rgb(250, 250, 250);
}
.u-cate-tab__page-view {
padding: 16rpx;
}
.u-cate-tab__page-item {
margin-bottom: 30rpx;
background-color: #fff;
padding: 16rpx;
border-radius: 8rpx;
}
.u-cate-tab__page-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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