smart-canteen/commpents/navbar/index.js

const app = getApp()
Component({
  properties: {
    navbarData: {   //navbarData   由父页面传递的数据
      type: Object,
      value: {},
      height: app.globalData.height
    },
    needBack: { type: Boolean, value: true }
  },
  data: {
    height: '',
    //默认值  默认显示左上角
    navbarData: {
    }
  },
  attached: function () {
    // 定义导航栏的高度   方便对齐
    this.setData({
      height: app.globalData.height
    })
  },
  created() {
    this.setData({
      height: app.globalData.height
    })
  },
  methods: {
    // 返回上一页面
    _navback() {
      // wx.navigateBack()
      this.triggerEvent('back',)
    }
  }
})