请问如何根据用户的openid切换不同的tabbar？

我想弄的是在用户点击进入的时候判断他是不是指定用户的openid，如果不是的话，tabbar显示首页和返回首页，如果是指定用户的openid，tabbar显示首页和发布。（在app.js已成功调用获取openid的云函数）
我在app.json的tabbar配置了"custom": true之后，tabbar不显示，把它去掉后又会显示了，不知道问题出在哪里，求指教！

app.json：

 "tabBar": {
    "custom": true,
    "list": [
      {
        "pagePath": "pages/home/home",
        "text": "首页"
      },
      {
        "pagePath": "pages/publish/publish",
        "text": "发布"
      },
      {
        "pagePath": "pages/notice/notice",
        "text": "返回"
      }

    ]
  },

  "usingComponents": {},

custom-tab-bar.js：

const app = getApp()

Component({

  data: {
    selected: 0,
    color: "#000000",
    roleId: '',
    selectedColor: "#1396DB",
    openid: '',
    list: [],
    allList: [{
      list1: [{
        pagePath: "../pages/home/home",
        text: "首页"
      }, {
        pagePath: "../pages/notice/notice",
        text: "返回首页"
      }],

      list2: [{
        pagePath: "../pages/home/home",
        text: "首页"
      }, {
        pagePath: "../pages/publish/publish",
        text: "发布"
      }]
    }],
  },

  attached() {
    let openid = app.globalData.openid
    if (openid !== 'orUNJ4x0onCasKAVhRD5jD2pql1A') {
      this.setData({
        list: this.data.allList[0].list1
      })
    } 
    else if (openid == 'orUNJ4x0onCasKAVhRD5jD2pql1A') {
      this.setData({
        list: this.data.allList[0].list2
      })
    } 
  },

  methods: {
    switchTab(e) {
      const data = e.currentTarget.dataset
      const url = data.path
      wx.switchTab({url})
      this.setData({
        selected: data.index
      })
    }
  }

custom-tab-bar.wxml：

<cover-view class="tab-bar">
  <cover-view class="tab-bar-border"></cover-view>
  <cover-view wx:for="{{list}}" wx:key="index" class="tab-bar-item" data-path="{{item.pagePath}}" data-index="{{index}}" bindtap="switchTab">
    <cover-view style="color: {{selected === index ? selectedColor : color}}">{{item.text}}</cover-view>
  </cover-view>
</cover-view>

home.js：

  onShow: function () {
    if (typeof this.getTabBar === 'function' &&
      this.getTabBar()) {
      this.getTabBar().setData({
        selected: 0
      })
    }
  },

custom-tab-bar.js这个文件是全的吗？少了一个})

我把代码上传到github上了，你对比看看吧
https://github.com/LiuYuZhang/wxm_test