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- <template>
- <uni-shadow-root class="vant-tabs-index"><view :class="'custom-class '+(utils.bem('tabs'))">
- <van-sticky :disabled="(!sticky)" :z-index="zIndex" :offset-top="offsetTop" :container="container" @scroll="onTouchScroll">
- <view :class="(utils.bem('tabs--') + type)+' '+(utils.bem('tabs__wrap', { scrollable }))+' '+(type === 'line' && border ? 'van-hairline--top-bottom' : '')+' wrap-class'">
- <slot name="nav-left"></slot>
- <scroll-view :enhanced="true" :show-scrollbar="false" :scroll-x="scrollable" :scroll-with-animation="scrollWithAnimation" :scroll-left="scrollLeft" :class="utils.bem('tabs__scroll', [type])" :style="color ? 'border-color: ' + color : ''">
- <view :class="(utils.bem('tabs__nav', [type, { complete: !ellipsis }]))+' nav-class'" :style="computed.navStyle(color, type)">
- <view v-if="type === 'line'" class="van-tabs__line" :style="computed.lineStyle({ color, lineOffsetLeft, lineHeight, skipTransition, duration, lineWidth, inited })"></view>
- <view v-for="(item,index) in (tabs)" :key="item.index" :data-index="index" :class="(computed.tabClass(index === currentIndex, ellipsis))+' '+(utils.bem('tab', { active: index === currentIndex, disabled: item.disabled, complete: !ellipsis }))" :style="computed.tabStyle({ active: index === currentIndex, ellipsis, color, type, disabled: item.disabled, titleActiveColor, titleInactiveColor, swipeThreshold, scrollable })" @click="onTap">
- <view :class="ellipsis ? 'van-ellipsis' : ''" :style="item.titleStyle">
- {{ item.title }}
- <van-info v-if="item.info !== null || item.dot" :info="item.info" :dot="item.dot" custom-class="van-tab__title__info"></van-info>
- </view>
- </view>
- </view>
- </scroll-view>
- <slot name="nav-right"></slot>
- </view>
- </van-sticky>
- <view class="van-tabs__content" @touchstart="onTouchStart" @touchmove="onTouchMove" @touchend="onTouchEnd" @touchcancel="onTouchEnd">
- <view :class="(utils.bem('tabs__track', [{ animated }]))+' van-tabs__track'" :style="computed.trackStyle({ duration, currentIndex, animated })">
- <slot></slot>
- </view>
- </view>
- </view></uni-shadow-root>
- </template>
- <wxs src="../wxs/utils.wxs" module="utils"></wxs><wxs src="./index.wxs" module="computed"></wxs>
- <script>
- import VanInfo from '../info/index.vue'
- import VanSticky from '../sticky/index.vue'
- global['__wxVueOptions'] = {components:{'van-info': VanInfo,'van-sticky': VanSticky}}
- global['__wxRoute'] = 'vant/tabs/index'
- import { VantComponent } from '../common/component';
- import { touch } from '../mixins/touch';
- import { getAllRect, getRect, groupSetData, nextTick, requestAnimationFrame, } from '../common/utils';
- import { isDef } from '../common/validator';
- import { useChildren } from '../common/relation';
- VantComponent({
- mixins: [touch],
- classes: [
- 'nav-class',
- 'tab-class',
- 'tab-active-class',
- 'line-class',
- 'wrap-class',
- ],
- relation: useChildren('tab', function () {
- this.updateTabs();
- }),
- props: {
- sticky: Boolean,
- border: Boolean,
- swipeable: Boolean,
- titleActiveColor: String,
- titleInactiveColor: String,
- color: String,
- animated: {
- type: Boolean,
- observer() {
- this.children.forEach((child, index) => child.updateRender(index === this.data.currentIndex, this));
- },
- },
- lineWidth: {
- type: null,
- value: 40,
- observer: 'resize',
- },
- lineHeight: {
- type: null,
- value: -1,
- },
- active: {
- type: null,
- value: 0,
- observer(name) {
- if (name !== this.getCurrentName()) {
- this.setCurrentIndexByName(name);
- }
- },
- },
- type: {
- type: String,
- value: 'line',
- },
- ellipsis: {
- type: Boolean,
- value: true,
- },
- duration: {
- type: Number,
- value: 0.3,
- },
- zIndex: {
- type: Number,
- value: 1,
- },
- swipeThreshold: {
- type: Number,
- value: 5,
- observer(value) {
- this.setData({
- scrollable: this.children.length > value || !this.data.ellipsis,
- });
- },
- },
- offsetTop: {
- type: Number,
- value: 0,
- },
- lazyRender: {
- type: Boolean,
- value: true,
- },
- useBeforeChange: {
- type: Boolean,
- value: false,
- },
- },
- data: {
- tabs: [],
- scrollLeft: 0,
- scrollable: false,
- currentIndex: 0,
- container: null,
- skipTransition: true,
- scrollWithAnimation: false,
- lineOffsetLeft: 0,
- inited: false,
- },
- mounted() {
- requestAnimationFrame(() => {
- this.swiping = true;
- this.setData({
- container: () => this.createSelectorQuery().select('.van-tabs'),
- });
- this.resize();
- this.scrollIntoView();
- });
- },
- methods: {
- updateTabs() {
- const { children = [], data } = this;
- this.setData({
- tabs: children.map((child) => child.data),
- scrollable: this.children.length > data.swipeThreshold || !data.ellipsis,
- });
- this.setCurrentIndexByName(data.active || this.getCurrentName());
- },
- trigger(eventName, child) {
- const { currentIndex } = this.data;
- const data = this.getChildData(currentIndex, child);
- if (!isDef(data)) {
- return;
- }
- this.$emit(eventName, data);
- },
- onTap(event) {
- const { index } = event.currentTarget.dataset;
- const child = this.children[index];
- if (child.data.disabled) {
- this.trigger('disabled', child);
- return;
- }
- this.onBeforeChange(index).then(() => {
- this.setCurrentIndex(index);
- nextTick(() => {
- this.trigger('click');
- });
- });
- },
-
- setCurrentIndexByName(name) {
- const { children = [] } = this;
- const matched = children.filter((child) => child.getComputedName() === name);
- if (matched.length) {
- this.setCurrentIndex(matched[0].index);
- }
- },
- setCurrentIndex(currentIndex) {
- const { data, children = [] } = this;
- if (!isDef(currentIndex) ||
- currentIndex >= children.length ||
- currentIndex < 0) {
- return;
- }
- groupSetData(this, () => {
- children.forEach((item, index) => {
- const active = index === currentIndex;
- if (active !== item.data.active || !item.inited) {
- item.updateRender(active, this);
- }
- });
- });
- if (currentIndex === data.currentIndex) {
- if (!data.inited) {
- this.resize();
- }
- return;
- }
- const shouldEmitChange = data.currentIndex !== null;
- this.setData({ currentIndex });
- requestAnimationFrame(() => {
- this.resize();
- this.scrollIntoView();
- });
- nextTick(() => {
- this.trigger('input');
- if (shouldEmitChange) {
- this.trigger('change');
- }
- });
- },
- getCurrentName() {
- const activeTab = this.children[this.data.currentIndex];
- if (activeTab) {
- return activeTab.getComputedName();
- }
- },
- resize() {
- if (this.data.type !== 'line') {
- return;
- }
- const { currentIndex, ellipsis, skipTransition } = this.data;
- Promise.all([
- getAllRect(this, '.van-tab'),
- getRect(this, '.van-tabs__line'),
- ]).then(([rects = [], lineRect]) => {
- const rect = rects[currentIndex];
- if (rect == null) {
- return;
- }
- let lineOffsetLeft = rects
- .slice(0, currentIndex)
- .reduce((prev, curr) => prev + curr.width, 0);
- lineOffsetLeft +=
- (rect.width - lineRect.width) / 2 + (ellipsis ? 0 : 8);
- this.setData({ lineOffsetLeft, inited: true });
- this.swiping = true;
- if (skipTransition) {
-
- setTimeout(() => {
- this.setData({ skipTransition: false });
- }, this.data.duration);
- }
- });
- },
-
- scrollIntoView() {
- const { currentIndex, scrollable, scrollWithAnimation } = this.data;
- if (!scrollable) {
- return;
- }
- Promise.all([
- getAllRect(this, '.van-tab'),
- getRect(this, '.van-tabs__nav'),
- ]).then(([tabRects, navRect]) => {
- const tabRect = tabRects[currentIndex];
- const offsetLeft = tabRects
- .slice(0, currentIndex)
- .reduce((prev, curr) => prev + curr.width, 0);
- this.setData({
- scrollLeft: offsetLeft - (navRect.width - tabRect.width) / 2,
- });
- if (!scrollWithAnimation) {
- nextTick(() => {
- this.setData({ scrollWithAnimation: true });
- });
- }
- });
- },
- onTouchScroll(event) {
- this.$emit('scroll', event.detail);
- },
- onTouchStart(event) {
- if (!this.data.swipeable)
- return;
- this.swiping = true;
- this.touchStart(event);
- },
- onTouchMove(event) {
- if (!this.data.swipeable || !this.swiping)
- return;
- this.touchMove(event);
- },
-
- onTouchEnd() {
- if (!this.data.swipeable || !this.swiping)
- return;
- const { direction, deltaX, offsetX } = this;
- const minSwipeDistance = 50;
- if (direction === 'horizontal' && offsetX >= minSwipeDistance) {
- const index = this.getAvaiableTab(deltaX);
- if (index !== -1) {
- this.onBeforeChange(index).then(() => this.setCurrentIndex(index));
- }
- }
- this.swiping = false;
- },
- getAvaiableTab(direction) {
- const { tabs, currentIndex } = this.data;
- const step = direction > 0 ? -1 : 1;
- for (let i = step; currentIndex + i < tabs.length && currentIndex + i >= 0; i += step) {
- const index = currentIndex + i;
- if (index >= 0 &&
- index < tabs.length &&
- tabs[index] &&
- !tabs[index].disabled) {
- return index;
- }
- }
- return -1;
- },
- onBeforeChange(index) {
- const { useBeforeChange } = this.data;
- if (!useBeforeChange) {
- return Promise.resolve();
- }
- return new Promise((resolve, reject) => {
- this.$emit('before-change', Object.assign(Object.assign({}, this.getChildData(index)), { callback: (status) => (status ? resolve() : reject()) }));
- });
- },
- getChildData(index, child) {
- const currentChild = child || this.children[index];
- if (!isDef(currentChild)) {
- return;
- }
- return {
- index: currentChild.index,
- name: currentChild.getComputedName(),
- title: currentChild.data.title,
- };
- },
- },
- });
- export default global['__wxComponents']['vant/tabs/index']
- </script>
- <style platform="mp-weixin">
- @import '../common/index.css';.van-tabs{-webkit-tap-highlight-color:transparent;position:relative}.van-tabs__wrap{display:flex;overflow:hidden}.van-tabs__wrap--scrollable .van-tab{flex:0 0 22%}.van-tabs__wrap--scrollable .van-tab--complete{flex:1 0 auto!important;padding:0 12px;background-color: var(--tab-background-color, transparent);margin-right: var(--tab-margin-right, 0);border-radius:var(--tab-border-radius, 0);}.van-tabs__wrap--scrollable .van-tabs__nav--complete{padding-left:8px;padding-right:8px}.van-tabs__scroll{background-color:var(--tabs-nav-background-color,#fff);overflow:auto}.van-tabs__scroll--line{box-sizing:initial;height:calc(100% + 15px)}.van-tabs__scroll--card{border:1px solid var(--tabs-default-color,#ee0a24);border-radius:2px;box-sizing:border-box;margin:0 var(--padding-md,16px);width:calc(100% - var(--padding-md, 16px)*2)}.van-tabs__scroll::-webkit-scrollbar{display:none}.van-tabs__nav{display:flex;position:relative;-webkit-user-select:none;user-select:none}.van-tabs__nav--card{box-sizing:border-box;height:var(--tabs-card-height,30px)}.van-tabs__nav--card .van-tab{border-right:1px solid var(--tabs-default-color,#ee0a24);color:var(--tabs-default-color,#ee0a24);line-height:calc(var(--tabs-card-height, 30px) - 2px)}.van-tabs__nav--card .van-tab:last-child{border-right:none}.van-tabs__nav--card .van-tab.van-tab--active{background-color:var(--tabs-default-color,#ee0a24);color:#fff}.van-tabs__nav--card .van-tab--disabled{color:var(--tab-disabled-text-color,#c8c9cc)}.van-tabs__line{background-color:var(--tabs-bottom-bar-color,#ee0a24);border-radius:var(--tabs-bottom-bar-height,3px);bottom:0;height:var(--tabs-bottom-bar-height,3px);left:0;opacity:0;position:absolute;z-index:1}.van-tabs__track{height:100%;position:relative;width:100%}.van-tabs__track--animated{display:flex;transition-property:left}.van-tabs__content{overflow:hidden;display: none}.van-tabs--line{height:var(--tabs-line-height,44px)}.van-tabs--card{height:var(--tabs-card-height,30px)}.van-tab{box-sizing:border-box;color:var(--tab-text-color,#646566);cursor:pointer;flex:1;font-size:var(--tab-font-size,14px);line-height:var(--tabs-line-height,44px);min-width:0;padding:0 5px;position:relative;text-align:center}.van-tab--active{color:var(--tab-active-text-color,#323233);background-color:var(--tab-active-background-color,transparent)!important;font-weight:var(--font-weight-bold,500)}.van-tab--disabled{color:var(--tab-disabled-text-color,#c8c9cc)}.van-tab__title__info{position:relative!important;top:-1px!important;transform:translateX(0)!important}
- </style>
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