選項卡的功能用途有很多地方：例如商品評論的切換，還有文章分類還有各種各樣的切換功能需要用到。這個實現是通過for迴圈，取數值下標的方式來實現切換

test.wxml

<view class='content'>
<view class='tab {{idx == index? "type-item-on" : ""}}' data-index='{{index}}' catchtap='tab' wx:for='{{tab}}' wx:key='key'>{{item.title}}</view>
</view>
<view wx:if='{{idx == 0}}' class='tab1' data-id='0' bindtouchmove="handletouchmove">1111</view>
<view wx:if='{{idx == 1}}' class='tab2' data-id='1' bindtouchmove="handletouchmove">222</view>
<view wx:if='{{idx == 2}}' class='tab3' data-id='2' bindtouchmove="handletouchmove">333</view>
 

test.wxss

page {
width: 100%;
height: 100%;
}

.content {
width: 100%;
display: flex;
justify-content: space-around;
}

.tab {
width: 30%;
height: 80rpx;
text-align: center;
line-height: 80rpx;
background: #f0f0f0;
padding: 5rpx;
}

.type-item-on {
border-bottom: 4rpx solid #e64340;
color: red;
}

.tab1 {
width: 100%;
height: 100%;
background: orange;
}
 

test.js

//logs.js
Page({

  /**
  * 頁面的初始資料
  */
  data: {
    tab: [{
      title: '111',
      id: 0
    },
    {
      title: '222',
      id: 1
    },
    {
      title: '333',
      id: 3
    },

    ],
    idx: 0, //預設選中第一項


  },

  /**
  * 生命週期函式--監聽頁面載入
  */
  onLoad: function (options) {

  },
  // tab
  tab(e) {
    let that = this;
    let index = e.currentTarget.dataset.index;
    that.setData({
      idx: index,
    })

  }
})