advertisingMiniProgram/miniprogram/custom-tab-bar/index.ts

// custom-tab-bar/index.ts
const app = getApp()
Component({
  /**
   * 组件的属性列表
   */
  properties: {
  },
  ready() {
    this.setData({
      pageName: app.globalData.tabActive
    })
  },
  /**
   * 组件的初始数据
   */
  data: {
    pageName: ""
  },

  /**
   * 组件的方法列表
   */
  methods: {
    changepage(e: any) {
      const url = e.target.dataset.index;
      this.setData({
        pageName: url
      }, () => {
        console.log(this.data.pageName)
        app.globalData.tabActive = url;
        wx.switchTab({ url })
      })
    }
  }
})