微信小程序顶部导航栏滑动tab效果

<scroll-view scroll-x="true" style="width: 100%;white-space:nowrap;"></scroll-view>

<scroll-view scroll-x="true" style="width: 100%;white-space:nowrap;"> <!-- tab --> <view class="tab">  <view class="tab-nav" style='font-size:12px'>  <view wx:for="{{tabnav.tabitem}}" bindtap="setTab" data-tabindex="{{index}}" style="min-width:20%;max-width:20%;text-align:center;height: 80rpx;{{index>4?'border-bottom: 1rpx dotted #ddd;':''}}">{{item.text}}</view>  <view >  <view class="tab-line" style="width:{{100/tabnav.tabnum}}%;transform:translateX({{100*showtab}}%);"></view>  </view>  </view> </view></scroll-view>

.tab{ display: flex; flex-direction: column;}.tab-nav{ height: 80rpx; background: #fff; border-bottom: 0.5rpx dotted #ddd; display: flex; line-height: 79rpx; position: relative;} .tab-line{ position: absolute; left: 0; bottom: -1rpx; height: 4rpx; background: #f7982a; transition: all 0.3s;}.tab-content{ flex: 1; overflow-y: auto; overflow-x: hidden;}

import util from './../../utils/util.js';Page({ data: { showtab: 0, //顶部选项卡索引 tabnav: {  tabnum: 5,  tabitem: [  {   "id": 0,   "text": "商品分类1"  },  {   "id": 1,   "text": "商品分类2"  },  {   "id": 2,   "text": "商品分类3"  },  {   "id": 3,   "text": "商品分类4"  },  {   "id": 4,   "text": "商品分类5"  },  {   "id": 5,   "text": "商品分类6"  },  {   "id": 6,   "text": "商品分类7"  }  ] }, productList: [], }, onLoad: function () { }, setTab: function (e) { const edata = e.currentTarget.dataset; this.setData({  showtab: edata.tabindex,   }) },})