xinda-miniprogram/src/components/loginNavbar/index.ts

const app = getApp<IAppOption>();

Component({
  properties: {
    num: {
      type: Number,
      value: 0,
    },
    back: {
      type: Boolean,
      value: false,
    },
  },
  data: {
    imageUrl: app.globalData.imageUrl,
    Timestamp: app.globalData.Timestamp,
  },
  methods: {
    handleBack() {
      this.triggerEvent("back");
    },
  },
});