mp_seller/custom-tab-bar/index.js

// custom-tab-bar/index.js
const app=getApp()
Component({
  /**
   * 组件的属性列表
   */
  properties: {

  },

  /**
   * 组件的初始数据
   */
  data: {
    active: 0,
    list: [
      {
        icon: 'todo-list-o',
        text: '订单处理',
        url: '/pages/index/index'
      },
      {
        icon: 'search',
        text: '订单查询',
        url: '/pages/order/index'
      },
      {
        icon:'shop-o',
        text:'店铺管理',
        url:'/pages/store/index'
      },{
        icon:'contact',
        text:'我的',
        url:'/pages/member/index'
      }
    ]
  },

  /**
   * 组件的方法列表
   */
  methods: {
    onChange(event) {
      this.setData({ active: event.detail });
      wx.switchTab({
        url: this.data.list[event.detail].url
      });
    },

    

    init() {
      const page = getCurrentPages().pop();
      if(app.globalData.orderNum>0){
        this.setData({
          ['list[0].info']:app.globalData.orderNum
        })
      }
      else{
        let {list}=this.data
        delete list[0].info
        this.setData({
         list:list
        })
      }
      this.setData({
        active: this.data.list.findIndex(item => item.url === `/${page.route}`)
      });
    }
  }
})