代码片段：

https://developers.weixin.qq.com/s/a9koVDmq7sDH

开发工具正常显示，但真机调试无法显示tabbar

1、开发者工具正常显示tabbar。

2、真机调试，无法显示自定义tabbar，底部为空白

3、system.js

userCheckRegister: function (openId, nickName, avatarUrl) {
    wx.setStorageSync('roleId', '2');
        // system页面 跳转至 用户主页home
    wx.reLaunch({
      url: '/pages/home/home?nickName=' + nickName + '&avatarUrl=' + avatarUrl + '&roleId=2',
    });
  },

4、home.js

data: {
    roleId: "", //角色ID
}
onLoad: function (options) {
    console.log(options.nickName);
    console.log(options.avatarUrl);
    console.log(options.roleId);
    if(roleid){
        this.setData({
          roleId:options.roleId
        })
    }
    
},
onShow: function () {
    if (typeof this.getTabBar === 'function' && this.getTabBar()) {
      this.getTabBar().setData({
        selected: 0
      })
    }
},

3、app.json

"pages": [
    "pages/system/system",
    "pages/home/home",
    "pages/me/me",
    "pages/selectEvaluateType/selectEvaluateType",
    "pages/selectNewFileType/selectNewFileType",
    .............
  ],
"window": {
    "navigationStyle": "custom",
    "backgroundTextStyle": "light",
    "navigationBarBackgroundColor": "#fff",
    "navigationBarTitleText": "Weixin",
    "navigationBarTextStyle": "black",
    "backgroundColor": "#FFF"
  },
"tabBar": {
    "custom": true,
    "color": "#999",
    "selectedColor": "#3974F6",
    "backgroundColor": "#fff",
    "borderStyle": "white",
    "list": [
      {
        "selectedIconPath": "resource/首页2.png",
        "iconPath": "resource/首页.png",
        "pagePath": "pages/home/home",
        "text": "首页"
      },
      {
        "selectedIconPath": "resource/新建档案2.png",
        "iconPath": "resource/新建档案.png",
        "pagePath": "pages/selectNewFileType/selectNewFileType",
        "text": "新建档案"
      },
      {
        "selectedIconPath": "resource/现场评价2.png",
        "iconPath": "resource/现场评价.png",
        "pagePath": "pages/selectEvaluateType/selectEvaluateType",
        "text": "现场评价"
      },
      {
        "selectedIconPath": "resource/我的2.png",
        "iconPath": "resource/我的.png",
        "pagePath": "pages/me/me",
        "text": "我的"
      }
    ]
  },

4、custom-tab-bar ->index.js

Component({
  data: {
    selected: 0,
    roleId: "",
    color: "#999",
    selectedColor: "#3974F6",
    backgroundColor: "#fff",
    borderStyle: "white",
    allList: [{
      list0: [
        {
          "selectedIconPath": "../resource/首页2.png",
          "iconPath": "../resource/首页.png",
          "pagePath": "../../pages/home/home",
          "text": "首页"
        },
        {
          "selectedIconPath": "../resource/新建档案2.png",
          "iconPath": "../resource/新建档案.png",
          "pagePath": "../../pages/selectNewFileType/selectNewFileType",
          "text": "新建档案"
        },
        {
          "selectedIconPath": "../resource/现场评价2.png",
          "iconPath": "../resource/现场评价.png",
          "pagePath": "../../pages/selectEvaluateType/selectEvaluateType",
          "text": "现场评价"
        },
        {
          "selectedIconPath": "../resource/我的2.png",
          "iconPath": "../resource/我的.png",
          "pagePath": "../../pages/me/me",
          "text": "我的"
        }
      ],
      list1: [
        {
          "selectedIconPath": "../resource/首页2.png",
          "iconPath": "../resource/首页.png",
          "pagePath": "../../pages/home/home",
          "text": "首页"
        },
        {
          "selectedIconPath": "../resource/我的2.png",
          "iconPath": "../resource/我的.png",
          "pagePath": "../../pages/me/me",
          "text": "我的"
        }
      ],


    }],
    list: []
  },
  attached() {
    console.log("custom tabbar roleId:", wx.getStorageSync('roleId'))
    //根据用户角色，显示不同的底部导航栏
    var roleId = wx.getStorageSync('roleId');
    //管理员
    if (roleId == "2") {
      this.setData({
        list: this.data.allList[0].list0
      })
    }
    //商家
    else if(roleId == "3"){
      this.setData({
        list: this.data.allList[0].list1
      })
    }
  },
  methods: {
    switchTab(e) {
      var index = e.currentTarget.dataset.index;
      var url = e.currentTarget.dataset.path;
      wx.switchTab({ url })
      this.setData({
        selected: index
      })
    }
  },
})