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-<template>
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- <view class="tabs">
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- <scroll-view ref="tabbar1" id="tab-bar" class="tab-bar" :scroll="false" :scroll-x="true" :show-scrollbar="false"
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- :scroll-into-view="scrollInto">
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- <view style="flex-direction: column;">
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- <view style="flex-direction: row;">
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- <view class="uni-tab-item" v-for="(tab,index) in tabList" :key="tab.id" :id="tab.id"
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- :ref="'tabitem'+index" :data-id="index" :data-current="index" @click="ontabtap">
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- <text class="uni-tab-item-title"
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- :class="tabIndex==index ? 'uni-tab-item-title-active' : ''">{{tab.name}}</text>
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- </view>
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- </view>
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- <view class="scroll-view-indicator">
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- <view ref="underline" class="scroll-view-underline" :class="isTap ? 'scroll-view-animation':''"
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- :style="{left: indicatorLineLeft + 'px', width: indicatorLineWidth + 'px'}"></view>
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- </view>
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- </view>
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- </scroll-view>
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- <view class="tab-bar-line"></view>
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- <swiper class="tab-view" ref="swiper1" id="tab-bar-view" :current="tabIndex" :duration="300"
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- @change="onswiperchange" @transition="onswiperscroll" @animationfinish="animationfinish"
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- @onAnimationEnd="animationfinish">
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- <swiper-item class="swiper-item" v-for="(page, index) in tabList" :key="index">
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- <swiper-page class="swiper-page" :pid="page.pageid" ref="page"></swiper-page>
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- </swiper-item>
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- </swiper>
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- </view>
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-</template>
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-
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-<script>
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- // #ifdef APP-PLUS
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- const dom = weex.requireModule('dom');
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- // #endif
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-
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- // 缓存每页最多
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- const MAX_CACHE_DATA = 100;
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-
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- // 缓存页签数量
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- const MAX_CACHE_PAGE = 3;
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- const TAB_PRELOAD_OFFSET = 1;
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-
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- import swiperPage from './nvue-swiper-page.nvue';
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-
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- export default {
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- components: {
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- swiperPage
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- },
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- data() {
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- return {
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- tabList: [],
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- tabIndex: 0,
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- cacheTab: [],
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- scrollInto: "",
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- indicatorLineLeft: 0,
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- indicatorLineWidth: 0,
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- isTap: false,
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- showTitleView: true,
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- pageId: "page",
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- refreshing: false,
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- refreshText: "",
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- refreshFlag: false
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- }
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- },
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- onLoad() {
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- for (var i = 0; i < 6; i++) {
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- this.tabList.push({
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- id: "tab" + i,
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- name: 'Tab ' + (i + 1),
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- pageid: i + 1
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- })
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- }
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- },
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- onReady() {
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- this._lastTabIndex = 0;
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- this.swiperWidth = 0;
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- this.tabbarWidth = 0;
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- this.tabListSize = {};
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- this._touchTabIndex = 0;
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-
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- this.pageList = this.$refs.page;
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- this.selectorQuery();
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- },
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- methods: {
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- ontabtap(e) {
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- let index = e.target.dataset.current || e.currentTarget.dataset.current;
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- //let offsetIndex = this._touchTabIndex = Math.abs(index - this._lastTabIndex) > 1;
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-
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- // #ifdef APP-PLUS || H5 || MP-WEIXIN || MP-QQ
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- this.isTap = true;
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- var currentSize = this.tabListSize[index];
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- this.updateIndicator(currentSize.left, currentSize.width);
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- this._touchTabIndex = index;
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- // #endif
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-
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- this.switchTab(index);
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- },
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- onswiperchange(e) {
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- // 注意:百度小程序会触发2次
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-
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- // #ifndef APP-PLUS || H5 || MP-WEIXIN || MP-QQ
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- let index = e.target.current || e.detail.current;
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- this.switchTab(index);
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- // #endif
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- },
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- onswiperscroll(e) {
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- if (this.isTap) {
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- return;
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- }
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-
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- var offsetX = e.detail.dx;
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- var preloadIndex = this._lastTabIndex;
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- if (offsetX > TAB_PRELOAD_OFFSET) {
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- preloadIndex++;
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- } else if (offsetX < -TAB_PRELOAD_OFFSET) {
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- preloadIndex--;
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- }
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- if (preloadIndex === this._lastTabIndex || preloadIndex < 0 || preloadIndex > this.pageList.length - 1) {
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- return;
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- }
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- if (this.pageList[preloadIndex].dataList.length === 0) {
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- this.loadTabData(preloadIndex);
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- }
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-
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- // #ifdef APP-PLUS || H5 || MP-WEIXIN || MP-QQ
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- var percentage = Math.abs(this.swiperWidth / offsetX);
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- var currentSize = this.tabListSize[this._lastTabIndex];
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- var preloadSize = this.tabListSize[preloadIndex];
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- var lineL = currentSize.left + (preloadSize.left - currentSize.left) / percentage;
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- var lineW = currentSize.width + (preloadSize.width - currentSize.width) / percentage;
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- this.updateIndicator(lineL, lineW);
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- // #endif
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- },
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- animationfinish(e) {
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- // #ifdef APP-PLUS || H5 || MP-WEIXIN || MP-QQ
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- let index = e.detail.current;
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- if (this._touchTabIndex === index) {
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- this.isTap = false;
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- }
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- this._lastTabIndex = index;
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- this.switchTab(index);
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- this.updateIndicator(this.tabListSize[index].left, this.tabListSize[index].width);
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- // #endif
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- },
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- selectorQuery() {
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- // #ifdef APP-NVUE
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- // 查询 tabbar 宽度
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- uni.createSelectorQuery().in(this).select('#tab-bar').boundingClientRect().exec(rect => {
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- this.tabbarWidth = rect[0].width;
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- });
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- // 查询 tabview 宽度
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- uni.createSelectorQuery().in(this).select('#tab-bar-view').boundingClientRect().exec(rect => {
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- this.swiperWidth = rect[0].width;
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- });
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-
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- // 因 nvue 暂不支持 class 查询
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- var queryTabSize = uni.createSelectorQuery().in(this);
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- for (var i = 0; i < this.tabList.length; i++) {
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- queryTabSize.select('#' + this.tabList[i].id).boundingClientRect();
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- }
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- queryTabSize.exec(rects => {
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- rects.forEach((rect) => {
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- this.tabListSize[rect.dataset.id] = rect;
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- })
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- this.updateIndicator(this.tabListSize[this.tabIndex].left, this.tabListSize[this.tabIndex]
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- .width);
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- this.switchTab(this.tabIndex);
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- });
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- // #endif
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-
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- // #ifdef MP-WEIXIN || H5 || MP-QQ
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- uni.createSelectorQuery().in(this).select('.tab-view').fields({
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- dataset: true,
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- size: true,
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- }, (res) => {
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- this.swiperWidth = res.width;
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- }).exec();
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- uni.createSelectorQuery().in(this).selectAll('.uni-tab-item').boundingClientRect((rects) => {
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- rects.forEach((rect) => {
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- this.tabListSize[rect.dataset.id] = rect;
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- })
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- this.updateIndicator(this.tabListSize[this.tabIndex].left, this.tabListSize[this.tabIndex]
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- .width);
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- }).exec();
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- // #endif
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- },
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- updateIndicator(left, width) {
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- this.indicatorLineLeft = left;
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- this.indicatorLineWidth = width;
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- },
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- switchTab(index) {
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- if (this.pageList[index].dataList.length === 0) {
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- this.loadTabData(index);
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- }
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-
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- if (this.tabIndex === index) {
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- return;
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- }
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-
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- // 缓存 tabId
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- if (this.pageList[this.tabIndex].dataList.length > MAX_CACHE_DATA) {
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- let isExist = this.cacheTab.indexOf(this.tabIndex);
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- if (isExist < 0) {
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- this.cacheTab.push(this.tabIndex);
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- }
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- }
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-
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- this.tabIndex = index;
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-
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- // #ifdef APP-NVUE
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- this.scrollTabTo(index);
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- // #endif
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- // #ifndef APP-NVUE
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- this.scrollInto = this.tabList[index].id;
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- // #endif
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-
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- // 释放 tabId
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- if (this.cacheTab.length > MAX_CACHE_PAGE) {
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- let cacheIndex = this.cacheTab[0];
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- this.clearTabData(cacheIndex);
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- this.cacheTab.splice(0, 1);
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- }
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- },
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- scrollTabTo(index) {
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- const el = this.$refs['tabitem' + index][0];
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- let offset = 0;
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- // TODO fix ios offset
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- if (index > 0) {
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- offset = this.tabbarWidth / 2 - this.tabListSize[index].width / 2;
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- if (this.tabListSize[index].right < this.tabbarWidth / 2) {
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- offset = this.tabListSize[0].width;
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- }
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- }
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- dom.scrollToElement(el, {
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- offset: -offset
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- });
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- },
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- loadTabData(index) {
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- this.pageList[index].loadData();
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- },
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- clearTabData(index) {
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- this.pageList[index].clear();
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- },
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- onrefresh(e) {
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- this.refreshing = true;
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- this.refreshText = "刷新中...";
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- setTimeout(() => {
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- this.refreshing = false;
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- this.refreshFlag = false;
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- this.refreshText = "已刷新";
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- }, 2000)
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- },
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- onpullingdown(e) {
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- if (this.refreshing) {
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- return;
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- }
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-
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- this.pulling = false;
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- if (Math.abs(e.pullingDistance) > Math.abs(e.viewHeight)) {
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- this.refreshFlag = true;
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- this.refreshText = "释放立即刷新";
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- } else {
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- this.refreshFlag = false;
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- this.refreshText = "下拉可以刷新";
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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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-
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-<style>
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- /* #ifndef APP-PLUS */
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- page {
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- width: 100%;
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- min-height: 100%;
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- display: flex;
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- }
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-
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- /* #endif */
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-
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- .page {
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- flex: 1;
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- }
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-
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- .flexible-view {
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- background-color: #f823ff;
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- }
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-
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- .tabs {
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- flex: 1;
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- flex-direction: column;
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- overflow: hidden;
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- background-color: #ffffff;
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- /* #ifdef MP-ALIPAY || MP-BAIDU */
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- height: 100vh;
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- /* #endif */
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- }
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-
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- .tab-bar {
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- width: 750upx;
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- height: 84upx;
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- flex-direction: row;
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- /* #ifndef APP-PLUS */
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- white-space: nowrap;
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- /* #endif */
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- }
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-
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- /* #ifndef APP-NVUE */
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- .tab-bar ::-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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-
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- /* #endif */
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-
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- .scroll-view-indicator {
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- position: relative;
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- height: 2px;
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- background-color: transparent;
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- }
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-
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- .scroll-view-underline {
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- position: absolute;
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- top: 0;
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- bottom: 0;
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- width: 0;
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- background-color: #007AFF;
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- }
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-
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- .scroll-view-animation {
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- transition-duration: 0.2s;
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- transition-property: left;
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- }
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-
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- .tab-bar-line {
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- height: 1upx;
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- background-color: #cccccc;
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- }
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-
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- .tab-view {
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- flex: 1;
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- }
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-
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- .uni-tab-item {
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- /* #ifndef APP-PLUS */
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- display: inline-block;
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- /* #endif */
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- flex-wrap: nowrap;
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- padding-left: 25px;
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- padding-right: 25px;
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- }
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-
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- .uni-tab-item-title {
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- color: #555;
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- font-size: 30upx;
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- height: 80upx;
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- line-height: 80upx;
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- flex-wrap: nowrap;
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- /* #ifndef APP-PLUS */
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- white-space: nowrap;
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- /* #endif */
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- }
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-
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- .uni-tab-item-title-active {
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- color: #007AFF;
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|
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- }
|
|
|
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-
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- .swiper-item {
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|
|
|
- flex: 1;
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- flex-direction: column;
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|
|
|
- }
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|
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-
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|
- .swiper-page {
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|
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|
- flex: 1;
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|
- flex-direction: column;
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|
- position: absolute;
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|
- left: 0;
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|
- top: 0;
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|
- right: 0;
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|
- bottom: 0;
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|
|
- }
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|
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|
-
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|
|
-</style>
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|