tabbar.nvue
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<template>
<view class="tabs">
<scroll-view id="tab-bar" class="scroll-h" :scroll-x="true" :show-scrollbar="false" :scroll-into-view="scrollInto">
<view v-for="(tab,index) in tabBars" :key="tab.id" class="uni-tab-item" :id="tab.id" :data-current="index" @click="ontabtap">
<text class="uni-tab-item-title" :class="tabIndex==index ? 'uni-tab-item-title-active' : ''">{{tab.name}}</text>
</view>
</scroll-view>
<view class="line-h"></view>
<swiper :current="tabIndex" class="swiper-box" style="flex: 1;" :duration="300" @change="ontabchange">
<swiper-item class="swiper-item" v-for="(tab,index1) in newsList" :key="index1">
<!-- #ifdef APP-NVUE -->
<list class="scroll-v list" enableBackToTop="true" scroll-y loadmoreoffset="15" @loadmore="loadMore(index1)">
<refresh class="refresh" @refresh="onrefresh(index1)" @pullingdown="onpullingdown" :display="tab.refreshing ? 'show' : 'hide'">
<div class="refresh-view">
<image class="refresh-icon" :src="refreshIcon" :style="{width: (tab.refreshing || pulling) ? 0: '30px'}" :class="{'refresh-icon-active': tab.refreshFlag}"></image>
<loading-indicator class="loading-icon" animating="true" v-if="tab.refreshing"></loading-indicator>
<text class="loading-text">{{tab.refreshText}}</text>
</div>
</refresh>
<cell v-for="(newsitem,index2) in tab.data" :key="newsitem.id">
<media-item :options="newsitem" @close="close(index1,index2)" @click="goDetail(newsitem)"></media-item>
</cell>
<cell class="loading-more" v-if="tab.isLoading || tab.data.length > 4">
<text class="loading-more-text">{{tab.loadingText}}</text>
</cell>
</list>
<!-- #endif -->
<!-- #ifndef APP-NVUE -->
<scroll-view class="scroll-v list" enableBackToTop="true" scroll-y @scrolltolower="loadMore(index1)">
<view v-for="(newsitem,index2) in tab.data" :key="newsitem.id">
<media-item :options="newsitem" @close="close(index1,index2)" @click="goDetail(newsitem)"></media-item>
</view>
<view class="loading-more" v-if="tab.isLoading || tab.data.length > 4">
<text class="loading-more-text">{{tab.loadingText}}</text>
</view>
</scroll-view>
<!-- #endif -->
</swiper-item>
</swiper>
</view>
</template>
<script>
import mediaItem from './news-item.nvue';
// 缓存每页最多
const MAX_CACHE_DATA = 100;
// 缓存页签数量
const MAX_CACHE_PAGE = 3;
const newsData = {
data0: {
"datetime": "40分钟前",
"article_type": 0,
"title": "uni-app行业峰会频频亮相，开发者反响热烈!",
"source": "DCloud",
"comment_count": 639
},
data1: {
"datetime": "一天前",
"article_type": 1,
"title": "DCloud完成B2轮融资，uni-app震撼发布!",
"image_url": "https://vkceyugu.cdn.bspapp.com/VKCEYUGU-dc-site/b7c7f970-517d-11eb-97b7-0dc4655d6e68.jpg",
"source": "DCloud",
"comment_count": 11395
},
data2: {
"datetime": "一天前",
"article_type": 2,
"title": "中国技术界小奇迹：HBuilder开发者突破200万",
"image_url": "https://vkceyugu.cdn.bspapp.com/VKCEYUGU-dc-site/b4cd3000-517d-11eb-a16f-5b3e54966275.jpg",
"source": "DCloud",
"comment_count": 11395
},
data3: {
"article_type": 3,
"image_list": [{
"url": "https://vkceyugu.cdn.bspapp.com/VKCEYUGU-dc-site/b2e201d0-517d-11eb-8a36-ebb87efcf8c0.jpg",
"width": 563,
"height": 316
}, {
"url": "https://vkceyugu.cdn.bspapp.com/VKCEYUGU-dc-site/b4cd3000-517d-11eb-a16f-5b3e54966275.jpg",
"width": 641,
"height": 360
}, {
"url": "https://vkceyugu.cdn.bspapp.com/VKCEYUGU-dc-site/b7c7f970-517d-11eb-97b7-0dc4655d6e68.jpg",
"width": 640,
"height": 360
}],
"datetime": "5分钟前",
"title": "uni-app 支持使用 npm 安装第三方包，生态更趋丰富",
"source": "DCloud",
"comment_count": 11
},
data4: {
"datetime": "2小时前",
"article_type": 4,
"title": "uni-app 支持原生小程序自定义组件，更开放、更自由",
"image_url": "https://vkceyugu.cdn.bspapp.com/VKCEYUGU-dc-site/b2e201d0-517d-11eb-8a36-ebb87efcf8c0.jpg",
"source": "DCloud",
"comment_count": 69
}
};
export default {
components: {
mediaItem
},
data() {
return {
newsList: [],
cacheTab: [],
tabIndex: 0,
tabBars: [{
name: '关注',
id: 'guanzhu'
}, {
name: '推荐',
id: 'tuijian'
}, {
name: '体育',
id: 'tiyu'
}, {
name: '热点',
id: 'redian'
}, {
name: '财经',
id: 'caijing'
}, {
name: '娱乐',
id: 'yule'
}, {
name: '军事',
id: 'junshi'
}, {
name: '历史',
id: 'lishi'
}, {
name: '本地',
id: 'bendi'
}],
scrollInto: "",
showTips: false,
navigateFlag: false,
pulling: false,
refreshIcon: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAMAAABg3Am1AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAB5QTFRFcHBw3Nzct7e39vb2ycnJioqK7e3tpqam29vb////D8oK7wAAAAp0Uk5T////////////ALLMLM8AAABxSURBVHja7JVBDoAgDASrjqj//7CJBi90iyYeOHTPMwmFZrHjYyyFYYUy1bwUZqtJIYVxhf1a6u0R7iUvWsCcrEtwJHp8MwMdvh2amHduiZD3rpWId9+BgPd7Cc2LIkPyqvlQvKxKBJ//Qwq/CacAAwDUv0a0YuKhzgAAAABJRU5ErkJggg=="
}
},
onLoad() {
setTimeout(()=>{
this.tabBars.forEach((tabBar) => {
this.newsList.push({
data: [],
isLoading: false,
refreshText: "",
loadingText: '加载更多...'
});
});
this.getList(0);
},350)
},
methods: {
getList(index) {
let activeTab = this.newsList[index];
let list = [];
for (let i = 1; i <= 10; i++) {
let item = Object.assign({}, newsData['data' + Math.floor(Math.random() * 5)]);
item.id = this.newGuid();
list.push(item);
}
activeTab.data = activeTab.data.concat(list);
},
goDetail(e) {
if (this.navigateFlag) {
return;
}
this.navigateFlag = true;
uni.navigateTo({
url: './detail/detail?title=' + e.title
});
setTimeout(() => {
this.navigateFlag = false;
}, 200)
},
close(index1, index2) {
uni.showModal({
content: '是否删除本条信息？',
success: (res) => {
if (res.confirm) {
this.newsList[index1].data.splice(index2, 1);
}
}
})
},
loadMore(e) {
setTimeout(() => {
this.getList(this.tabIndex);
}, 500)
},
ontabtap(e) {
let index = e.target.dataset.current || e.currentTarget.dataset.current;
this.switchTab(index);
},
ontabchange(e) {
let index = e.target.current || e.detail.current;
this.switchTab(index);
},
switchTab(index) {
if (this.newsList[index].data.length === 0) {
this.getList(index);
}
if (this.tabIndex === index) {
return;
}
// 缓存 tabId
if (this.newsList[this.tabIndex].data.length > MAX_CACHE_DATA) {
let isExist = this.cacheTab.indexOf(this.tabIndex);
if (isExist < 0) {
this.cacheTab.push(this.tabIndex);
//console.log("cache index:: " + this.tabIndex);
}
}
this.tabIndex = index;
this.scrollInto = this.tabBars[index].id;
// 释放 tabId
if (this.cacheTab.length > MAX_CACHE_PAGE) {
let cacheIndex = this.cacheTab[0];
this.clearTabData(cacheIndex);
this.cacheTab.splice(0, 1);
//console.log("remove cache index:: " + cacheIndex);
}
},
clearTabData(e) {
this.newsList[e].data.length = 0;
this.newsList[e].loadingText = "加载更多...";
},
refreshData() {},
onrefresh(e) {
var tab = this.newsList[this.tabIndex];
if (!tab.refreshFlag) {
return;
}
tab.refreshing = true;
tab.refreshText = "正在刷新...";
setTimeout(() => {
this.refreshData();
this.pulling = true;
tab.refreshing = false;
tab.refreshFlag = false;
tab.refreshText = "已刷新";
setTimeout(() => { // TODO fix ios和Android 动画时间相反问题
this.pulling = false;
}, 500);
}, 2000);
},
onpullingdown(e) {
var tab = this.newsList[this.tabIndex];
if (tab.refreshing || this.pulling) {
return;
}
if (Math.abs(e.pullingDistance) > Math.abs(e.viewHeight)) {
tab.refreshFlag = true;
tab.refreshText = "释放立即刷新";
} else {
tab.refreshFlag = false;
tab.refreshText = "下拉可以刷新";
}
},
newGuid() {
let s4 = function() {
return (65536 * (1 + Math.random()) | 0).toString(16).substring(1);
}
return (s4() + s4() + "-" + s4() + "-4" + s4().substr(0, 3) + "-" + s4() + "-" + s4() + s4() + s4()).toUpperCase();
}
}
}
</script>
<style>
/* #ifndef APP-PLUS */
page {
width: 100%;
min-height: 100%;
display: flex;
}
/* #endif */
.tabs {
flex: 1;
flex-direction: column;
overflow: hidden;
background-color: #ffffff;
/* #ifndef APP-PLUS */
height: 100vh;
/* #endif */
}
.scroll-h {
width: 750rpx;
/* #ifdef H5 */
width:100%;
/* #endif */
height: 80rpx;
flex-direction: row;
/* #ifndef APP-PLUS */
white-space: nowrap;
/* #endif */
/* flex-wrap: nowrap; */
/* border-color: #cccccc;
border-bottom-style: solid;
border-bottom-width: 1px; */
}
.line-h {
height: 1rpx;
background-color: #cccccc;
}
.uni-tab-item {
/* #ifndef APP-PLUS */
display: inline-block;
/* #endif */
flex-wrap: nowrap;
padding-left: 34rpx;
padding-right: 34rpx;
}
.uni-tab-item-title {
color: #555;
font-size: 30rpx;
height: 80rpx;
line-height: 80rpx;
flex-wrap: nowrap;
/* #ifndef APP-PLUS */
white-space: nowrap;
/* #endif */
}
.uni-tab-item-title-active {
color: #007AFF;
}
.swiper-box {
flex: 1;
}
.swiper-item {
flex: 1;
flex-direction: row;
}
.scroll-v {
flex: 1;
/* #ifndef MP-ALIPAY */
flex-direction: column;
/* #endif */
width: 750rpx;
width:100%;
}
.update-tips {
position: absolute;
left: 0;
top: 41px;
right: 0;
padding-top: 5px;
padding-bottom: 5px;
background-color: #FDDD9B;
align-items: center;
justify-content: center;
text-align: center;
}
.update-tips-text {
font-size: 14px;
color: #ffffff;
}
.refresh {
width: 750rpx;
width:100%;
height: 64px;
justify-content: center;
}
.refresh-view {
flex-direction: row;
flex-wrap: nowrap;
align-items: center;
justify-content: center;
}
.refresh-icon {
width: 30px;
height: 30px;
transition-duration: .5s;
transition-property: transform;
transform: rotate(0deg);
transform-origin: 15px 15px;
}
.refresh-icon-active {
transform: rotate(180deg);
}
.loading-icon {
width: 20px;
height: 20px;
margin-right: 5px;
color: #999999;
}
.loading-text {
margin-left: 2px;
font-size: 16px;
color: #999999;
}
.loading-more {
align-items: center;
justify-content: center;
padding-top: 10px;
padding-bottom: 10px;
text-align: center;
}
.loading-more-text {
font-size: 28rpx;
color: #999;
}
</style>