根据id来实现小程序tab切换，

本例根据绑定id来实现tab切换，但本例仍有缺陷，用for循环数据，无法实现切换。如有大神能够有更好方法，欢迎留言更正

WXML:

<view class="tab">
  <view bindtap="tabs" class="{{tabArr.curHdIndex=='0'? 'active' : ''}}" id="0" data-id="0">tab-hd01</view>
  <view bindtap="tabs" class="{{tabArr.curHdIndex=='1'? 'active' : ''}}" id="1" data-id="1">tab-hd02</view>
  <view bindtap="tabs" class="{{tabArr.curHdIndex=='2'? 'active' : ''}}" id="2" data-id="2">tab-hd03</view>
  <view bindtap="tabs" class="{{tabArr.curHdIndex=='3'? 'active' : ''}}" id="3" data-id="3">tab-hd04</view>
</view> 

<view class="tabcon">
  <view class="{{tabArr.curBdIndex=='0'? 'active' : ''}}">tab-bd01111</view>
  <view class="{{tabArr.curBdIndex=='1'? 'active' : ''}}">tab-bd02222</view>
  <view class="{{tabArr.curBdIndex=='2'? 'active' : ''}}">tab-bd03333</view>
  <view class="{{tabArr.curBdIndex=='3'? 'active' : ''}}">tab-bd04444</view>
</view>

WXSS:

.tab{
  display: flex;
  flex-direction:row;
  height: 50px;
  line-height: 50px;

}
.tab view{
  width: 25%;
  text-align: center;
}
.tab .active{
  display: inline-block;
  color: #188eee;
  border-bottom: 1px #188eee solid;
}
.tabcon view{
  display: none;
}
.tabcon .active{
  display: inline-block;
}

JS

Page({
  data: {
    tabArr: {
      curHdIndex: 0,
      curBdIndex: 0,
    }
  },
  tabs: function (e) {
    var dataId = e.currentTarget.id;
    var obj = {};
    obj.curHdIndex = dataId;
    obj.curBdIndex = dataId;

    this.setData({
      tabArr: obj
    });
  }
});