1 <view class="nav-tabs">
2   <view class="tab-list  {{currentTab == idx?'active':'default'}}" wx:for="{{tabArray}}" wx:key="prototype" wx:for-index="idx"            wx:for-item="itemName" data-current="{{idx}}" bindtap="swichNav">{{itemName}}
3   </view>
4 </view>
5 <view class="{{currentTab == idx?'show':'hidden'}} tab-content" wx:for="{{tabArray}}" wx:key="prototype" wx:for-index="idx"               wx:for-item="itemName">{{itemName}}-{{idx+1}}
6 </view>

 1 /**index.wxss**/
 2 
 3 page {
 4   display: flex;
 5   flex-direction: column;
 6   height: 100%;
 7 }
 8 
 9 .nav-tabs {
10   width: 100%;
11   height: 75rpx;
12   display: flex;
13   position: fixed;
14   bottom: 0;
15 }
16 
17 .tab-content {
18   flex: 1;
19 }
20 
21 .default {
22   line-height: 75rpx;
23   text-align: center;
24   flex: 1;
25   border-bottom: 1px solid #eee;
26   color: #000;
27   font-weight: bold;
28   font-size: 28rpx;
29 }
30 
31 .active {
32   line-height: 75rpx;
33   text-align: center;
34   color: #fc5558;
35   flex: 1;
36   border-bottom: 1px solid red;
37   font-weight: bold;
38   font-size: 28rpx;
39 }
40 
41 .show {
42   display: block;
43   flex: 1;
44 }
45 
46 .hidden {
47   display: none;
48   flex: 1;
49 }

 1 //index.js
 2 //获取应用实例
 3 let app = getApp()
 4 Page({
 5   data: {
 6     currentTab: 0,
 7     tabArray: ["tab1", "tab2", "tab3", "tab4"]
 8   },
 9   //事件处理函数
10   bindChange: function(e) {
11     let that = this;
12     that.setData({
13       currentTab: e.detail.current
14     });
15   },
16   swichNav: function(e) {
17     let that = this;
18     if (this.data.currentTab === e.target.dataset.current) {
19       return false;
20     } else {
21       that.setData({
22         currentTab: e.target.dataset.current
23       })
24     }
25   },
26   onLoad: function() {
27     let that = this
28   
29     app.getUserInfo(function(userInfo) {
30       
31       that.setData({
32         userInfo: userInfo
33       })
34     })
35   }
36 })