407 lines
13 KiB
Vue
407 lines
13 KiB
Vue
<template>
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<view class="u-tabs" :style="$u.toStyle({ zIndex: zIndex, background: bgColor }, customStyle)" :class="customClass">
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<scroll-view
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scroll-x
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class="u-scroll-view"
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:scroll-left="scrollLeft"
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:show-scrollbar="false"
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scroll-with-animation
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:style="{ zIndex: Number(zIndex) + 1 }"
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>
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<view class="u-tabs-scroll-box" :class="{ 'u-tabs-scroll-flex': !isScroll }">
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<view
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class="u-tabs-item"
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:style="tabItemStyle(index)"
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v-for="(item, index) in getTabs"
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:key="index"
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:class="[preId + index]"
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@tap="emitTabChange(index)"
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>
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<u-badge :count="item[count] || item['count'] || 0" :offset="offset" size="mini"></u-badge>
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{{ item[name] || item['name'] }}
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</view>
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<view v-if="showBar" class="u-scroll-bar" :style="tabBarStyle"></view>
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</view>
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</scroll-view>
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</view>
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</template>
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<script lang="ts">
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export default {
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name: 'u-tabs-swiper',
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options: {
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addGlobalClass: true,
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// #ifndef MP-TOUTIAO
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virtualHost: true,
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// #endif
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styleIsolation: 'shared'
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}
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};
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</script>
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<script setup lang="ts">
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import { ref, computed, watch, nextTick, onMounted, getCurrentInstance } from 'vue';
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import colorGradient from '../../libs/function/colorGradient';
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import { TabsSwiperProps } from './types';
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import { $u } from '../..';
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/**
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* tabsSwiper 全屏选项卡
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* @description 该组件内部实现主要依托于uniapp的scroll-view和swiper组件，主要特色是切换过程中，tabsSwiper文字的颜色可以渐变，底部滑块可以 跟随式滑动，活动tab滚动居中等。应用场景可以用于需要左右切换页面，比如商城的订单中心(待收货-待付款-待评价-已退货)等应用场景。
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* @tutorial https://uviewpro.cn/zh/components/tabsSwiper.html
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* @property {Boolean} is-scroll tabs是否可以左右拖动（默认true）
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* @property {Array} list 标签数组，元素为对象，如[{name: '推荐'}]
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* @property {String|Number} current 指定哪个tab为激活状态（默认0）
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* @property {String|Number} height 导航栏的高度，单位rpx（默认80）
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* @property {String|Number} font-size tab文字大小，单位rpx（默认30）
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* @property {String|Number} swiper-width tabs组件外部swiper的宽度，默认为屏幕宽度，单位rpx（默认750）
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* @property {String} active-color 滑块和激活tab文字的颜色（默认主题色primary）
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* @property {String} inactive-color tabs文字颜色（默认var(--u-main-color)）
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* @property {String|Number} bar-width 滑块宽度，单位rpx（默认40）
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* @property {String|Number} bar-height 滑块高度，单位rpx（默认6）
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* @property {Object} bar-style 底部滑块的样式，对象形式
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* @property {Object} active-item-style 活动tabs item的样式，对象形式
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* @property {Boolean} show-bar 是否显示底部的滑块（默认true）
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* @property {String|Number} gutter 单个tab标签的左右内边距之和，单位rpx（默认40）
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* @property {String} bg-color tabs导航栏的背景颜色（默认var(--u-bg-white)）
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* @property {String} name 组件内部读取的list参数中的属性名，见官网说明（默认name）
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* @property {String} count 组件内部读取的list参数中的属性名（badge徽标数），同name属性的使用，见官网说明（默认count）
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* @property {Array} offset 设置badge徽标数的位置偏移，格式为 [x, y]，也即设置的为top和right的值，单位rpx（默认[5, 20]）
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* @property {Boolean} bold 激活选项的字体是否加粗（默认true）
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* @event {Function} change 点击标签时触发
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* @example <u-tabs-swiper ref="tabs" :list="list" :is-scroll="false"></u-tabs-swiper>
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*/
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// props 定义
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const props = defineProps(TabsSwiperProps);
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const color = colorGradient;
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const { windowWidth } = uni.getSystemInfoSync();
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const preId = 'UEl_';
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// emits 定义
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const emit = defineEmits(['change']);
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const instance = getCurrentInstance();
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// 滚动scroll-view的左边滚动距离
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const scrollLeft = ref(0);
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// 存放对tab菜单查询后的节点信息
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const tabQueryInfo = ref<any[]>([]);
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// 屏幕宽度，单位为px
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const componentsWidth = ref(0);
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// 滑块需要通过translateX()移动的距离
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const line3Dx = ref(0);
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const line3AddDx = ref(0);
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const animationFinishCurrent = ref(Number(props.current));
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// 两个颜色之间的渐变等分
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const colorStep = ref(100);
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const colorGradientArr = ref<string[]>([]);
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const tabsInfo = ref<any[]>([]);
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const sW = ref(uni.upx2px(Number(props.swiperWidth)));
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// 计算当前活跃tab索引
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const getCurrent = computed(() => {
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const current = Number(props.current);
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// 判断是否超出边界
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if (current > getTabs.value.length - 1) return getTabs.value.length - 1;
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if (current < 0) return 0;
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return current;
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});
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// 获取tabs数组
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const getTabs = computed(() => props.list);
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// 滑块需要移动的距离
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const scrollBarLeft = computed(() => Number(line3Dx.value) + Number(line3AddDx.value));
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// 滑块宽度转为px单位
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const barWidthPx = computed(() => uni.upx2px(Number(props.barWidth)));
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// tab的样式
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function tabItemStyle(index: number) {
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let style: Record<string, any> = {
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height: props.height + 'rpx',
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lineHeight: props.height + 'rpx',
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padding: `0 ${Number(props.gutter) / 2}rpx`,
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color:
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tabsInfo.value.length > 0
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? tabsInfo.value[index]
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? tabsInfo.value[index].color
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: props.activeColor
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: props.inactiveColor,
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fontSize: props.fontSize + 'rpx',
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zIndex: Number(props.zIndex) + 2,
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fontWeight: index == getCurrent.value && props.bold ? 'bold' : 'normal'
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};
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if (index == getCurrent.value) {
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// 给选中的tab item添加外部自定义的样式
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style = Object.assign(style, props.activeItemStyle);
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}
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return style;
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}
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// 底部滑块的样式
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const tabBarStyle = computed(() => {
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let style: Record<string, any> = {
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width: barWidthPx.value + 'px',
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height: props.barHeight + 'rpx',
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borderRadius: '100px',
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backgroundColor: props.activeColor,
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left: scrollBarLeft.value + 'px'
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};
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return Object.assign(style, props.barStyle);
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});
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// 颜色渐变过程数组
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function updateColorGradientArr() {
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colorGradientArr.value = color.colorGradient(props.inactiveColor, props.activeColor, colorStep.value);
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}
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// tabsInfo 计算
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async function getTabsInfo() {
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return new Promise<void>(resolve => {
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const view = uni.createSelectorQuery().in(instance?.proxy);
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for (let i = 0; i < props.list.length; i++) {
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view.select('.' + preId + i).boundingClientRect();
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}
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view.exec((res: any[]) => {
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const arr: any[] = [];
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for (let i = 0; i < res.length; i++) {
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// 给每个tab添加其文字颜色属性
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res[i].color = props.inactiveColor;
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// 当前tab直接赋予activeColor
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if (i == getCurrent.value) res[i].color = props.activeColor;
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arr.push(res[i]);
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}
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tabsInfo.value = arr;
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resolve();
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});
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});
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}
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// 当swiper滑动结束，计算滑块最终要停留的位置
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function countLine3Dx() {
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const tab = tabsInfo.value[animationFinishCurrent.value];
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// 让滑块中心点和当前tab中心重合
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if (tab) line3Dx.value = tab.left + tab.width / 2 - barWidthPx.value / 2 - tabsInfo.value[0].left;
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}
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// swiper宽度由rpx转为px单位
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function countPx() {
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// swiper宽度由rpx转为px单位，因为dx等，都是px单位
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sW.value = uni.upx2px(Number(props.swiperWidth));
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}
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// 触发change事件
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function emitTabChange(index: number) {
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emit('change', index);
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}
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// 滚动居中
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function setScrollViewToCenter() {
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const tab = tabsInfo.value[animationFinishCurrent.value];
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if (tab) {
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const tabCenter = tab.left + tab.width / 2;
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let fatherWidth;
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if (props.autoCenterMode === 'window') fatherWidth = windowWidth;
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else fatherWidth = componentsWidth.value;
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scrollLeft.value = tabCenter - fatherWidth / 2;
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}
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}
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// 查询tab组件宽度
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function getQuery(cb?: (data: any) => void) {
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try {
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const view = uni.createSelectorQuery().in(instance?.proxy).select('.u-tabs');
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view.fields({ size: true }, (data: any) => {
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if (data) {
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componentsWidth.value = data.width;
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if (cb) cb(data);
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} else {
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getQuery(cb);
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}
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}).exec();
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} catch (e) {
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componentsWidth.value = windowWidth;
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}
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}
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// 颜色渐变tab滑动
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function setDx(dx: number) {
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let nextTabIndex = dx > 0 ? animationFinishCurrent.value + 1 : animationFinishCurrent.value - 1;
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// 判断索引是否超出边界
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nextTabIndex = nextTabIndex <= 0 ? 0 : nextTabIndex;
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nextTabIndex = nextTabIndex >= props.list.length ? props.list.length - 1 : nextTabIndex;
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const tab = tabsInfo.value[nextTabIndex];
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// 当前tab中心点x轴坐标
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const nowTab = tabsInfo.value[animationFinishCurrent.value];
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const nowTabX = nowTab.left + nowTab.width / 2;
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// 下一个tab
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const nextTabX = tab.left + tab.width / 2;
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// 两个tab之间的距离，因为下一个tab可能在当前tab的左边或者右边，取绝对值即可
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const distanceX = Math.abs(nextTabX - nowTabX);
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line3AddDx.value = (dx / sW.value) * distanceX;
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setTabColor(animationFinishCurrent.value, nextTabIndex, dx);
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}
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// 设置tab的颜色
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function setTabColor(nowTabIndex: number, nextTabIndex: number, dx: number) {
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let colorIndex = Math.abs(Math.ceil((dx / sW.value) * 100));
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const colorLength = colorGradientArr.value.length;
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// 处理超出索引边界的情况
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colorIndex = colorIndex >= colorLength ? colorLength - 1 : colorIndex <= 0 ? 0 : colorIndex;
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// 设置下一个tab的颜色
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tabsInfo.value[nextTabIndex].color = colorGradientArr.value[colorIndex];
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// 设置当前tab的颜色
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tabsInfo.value[nowTabIndex].color = colorGradientArr.value[colorLength - 1 - colorIndex];
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}
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// swiper结束滑动
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function setFinishCurrent(current: number) {
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// 如果滑动的索引不一致，修改tab颜色变化，因为可能会有直接点击tab的情况
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tabsInfo.value = tabsInfo.value.map((val, index) => {
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val.color = current == index ? props.activeColor : props.inactiveColor;
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return val;
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});
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line3AddDx.value = 0;
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animationFinishCurrent.value = current;
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countLine3Dx();
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}
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// 监听current变化
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watch(
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() => props.current,
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n => {
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setFinishCurrent(Number(n));
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}
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);
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// 监听list变化
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watch(
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() => props.list,
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() => {
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nextTick(() => {
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init();
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});
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}
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);
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// 初始化
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async function init() {
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countPx();
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await getTabsInfo();
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countLine3Dx();
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getQuery(() => {
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setScrollViewToCenter();
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});
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updateColorGradientArr();
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}
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onMounted(() => {
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init();
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});
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defineExpose({ init, emit, setDx, setFinishCurrent, setTabColor, setScrollViewToCenter });
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</script>
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<style scoped lang="scss">
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@import '../../libs/css/style.components.scss';
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view,
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scroll-view {
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box-sizing: border-box;
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}
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.u-tabs {
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width: 100%;
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transition-property: background-color, color;
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}
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::-webkit-scrollbar {
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display: none;
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width: 0 !important;
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height: 0 !important;
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-webkit-appearance: none;
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background: transparent;
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}
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/* #ifdef H5 */
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// 通过样式穿透，隐藏H5下，scroll-view下的滚动条
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scroll-view ::v-deep ::-webkit-scrollbar {
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display: none;
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width: 0 !important;
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height: 0 !important;
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-webkit-appearance: none;
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background: transparent;
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}
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/* #endif */
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.u-scroll-view {
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width: 100%;
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white-space: nowrap;
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position: relative;
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}
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.u-tabs-scroll-box {
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position: relative;
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}
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.u-tabs-scroll-flex {
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@include vue-flex;
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justify-content: space-between;
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}
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.u-tabs-scroll-flex .u-tabs-item {
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flex: 1;
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}
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.u-tabs-item {
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position: relative;
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display: inline-block;
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text-align: center;
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transition-property: background-color, color, font-weight;
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}
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.content {
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overflow: hidden;
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white-space: nowrap;
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text-overflow: ellipsis;
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}
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.boxStyle {
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pointer-events: none;
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position: absolute;
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transition-property: all;
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}
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.boxStyle2 {
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pointer-events: none;
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position: absolute;
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bottom: 0;
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transition-property: all;
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transform: translateY(-100%);
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}
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.itemBackgroundBox {
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pointer-events: none;
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position: absolute;
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top: 0;
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transition-property: left, background-color;
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@include vue-flex;
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flex-direction: row;
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justify-content: center;
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align-items: center;
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}
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.itemBackground {
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height: 100%;
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width: 100%;
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transition-property: all;
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}
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.u-scroll-bar {
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position: absolute;
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bottom: 4rpx;
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}
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</style>
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