wx.onNetworkStatusChange(function (res) 监听网络状态变化 实践方案

 网络状态 · 小程序 https://developers.weixin.qq.com/miniprogram/dev/api/device.html#wxonnetworkstatuschangecallback

import wepy from 'wepy'
import util from './util'
import md5 from './md5'
// import tip from './tip'

const networkStatusChangeLog = () => {
  try {
    wx.removeStorageSync('onNetworkStatusChange')
  } catch (e) {
    // Do something when catch error
    console.log(e)
  }
  const log = new Date().toUTCString() + 'BizInfo' + 'uploadWhenOk'
  wx.setStorageSync('onNetworkStatusChange', log)
}

const isConnected = async () => {
  let container = {}
  await wx.getNetworkType({
    success: function (res) {
      container = res
      console.log(res)
    },
    fail: function (res) {},
    complete: function (res) {}
  })
  await wx.onNetworkStatusChange(function (res) {
    console.log('onNetworkStatusChange',res)
  })

  // console.log(container)
  // if (!container.networkStatus.isConnected) {
  //   wx.showToast({
  //     title: '无网络',
  //     icon: 'loading',
  //     duration: 2000
  //   })
  //   networkStatusChangeLog()
  //   return false
  // }
  return true
}

const appendInfo = () => {
  const API_SECRET_KEY = 'https://github.com/dyq086/wepy-mall/tree/master/src'
  const TIMESTAMP = util.getCurrentTime()
  const SIGN = md5.hex_md5((TIMESTAMP + API_SECRET_KEY).toLowerCase())
  const MORE = 'more......'
  return {
    'API_SECRET_KEY': API_SECRET_KEY,
    'TIMESTAMP': TIMESTAMP,
    'SIGN': SIGN,
    'MORE': MORE
  }
}

const wxRequest = async (params = {}, url) => {
  console.log('wxRequest', params)
  const c = await isConnected()
  if (!c) {
    return
  }
  // tip.loading()
  let data = params.query || {}
  const header = params.header || {}
  const isAppend = params.isAppend || false
  if (isAppend) {
    const a = appendInfo()
    for (let k in a) {
      eval('data.' + k + '= a.' + k)
    }
  }
  let res = await wepy.request({
    url: url,
    method: params.method || 'GET',
    data: data,
    header: header
  })
  // tip.loaded()
  console.log('wxRequest', res)
  return res
}

module.exports = {
  wxRequest
}

　　

和声明的位置无关，一次声明，整个小程序 都在使用

所以放到

app.wpy?

1、在回调函数中添加本地存储的代码，每次监听到网络状态变化都会在本地记录，然后给用户弹出提醒框；

2、声明一次；

3、在请求网络的公共方法处添加网络状态钩子，方式为读取1中的本地的网络数据。

D:GPUGOMPwepympBMCwepysrcapp.wpy

<style lang="less">
  .container {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    box-sizing: border-box;
  }
</style>

<script>
  import wepy from 'wepy'
  import 'wepy-async-function'
  import {
    setStore
  } from 'wepy-redux'
  import configStore from './store'
  const store = configStore()
  setStore(store)
  export default class extends wepy.app {
    config = {
      pages: [
        //     'pages/index', 'pages/advertisement', 'pages/companyShow', 'pages/logs', 'pages/materialUpload', 'pages/news', 'pages/questionsAnswers', 'pages/userCenter', 'pages/consumeRecord', 'pages/companyInfo', 'pages/userInfo', 'pages/userLogin', 'pages/videoUpload', 'pages/aboutUs', 'pages/recharge', 'pages/helpCenter', 'pages/commonService', 'pages/cloundAd', 'pages/cloundNews', 'pages/cloundSEM', 'pages/companyQA', 'pages/companyBK', 'pages/shortVideo', 'pages/newsWebView'
        'pages/index', 'pages/news', 'pages/userCenter', 'pages/newsWebView', 'pages/userLogin', 'pages/companyInfo', 'pages/personalInfo'
      ],
      window: {
        backgroundTextStyle: 'light',
        navigationBarBackgroundColor: '#fff',
        navigationBarTitleText: 'WeChat',
        navigationBarTextStyle: 'black'
      },
      tabBar: {
        list: [{
            pagePath: 'pages/index',
            text: '首wepy',
            iconPath: 'images/bar1a.png',
            selectedIconPath: 'images/bar1b.png'
          },
          {
            pagePath: 'pages/news',
            text: '资讯',
            iconPath: 'images/bar2a.png',
            selectedIconPath: 'images/bar2b.png'
          },
          {
            pagePath: 'pages/userCenter',
            text: '我的',
            iconPath: 'images/bar3a.png',
            selectedIconPath: 'images/bar3b.png'
          }
        ]
      }
    }
    customData = {
      common: {
        apiUrl: 'http://api.dev.com:8000/',
        imgUrlMP: 'http://blackhole.dev.com/images/',
        imgUrlBiz: 'http://api.dev.com:8000/',
        dataEyePath: 'http://blackhole.dev.com:50000',
        localImgPath: 'http://blackhole.dev.com/images/'
      }
    }
    globalData = {
      userInfo: null
    }
    constructor() {
      super()
      this.use('requestfix')
      this.use('promisify')
    }
    networkStatusChangeLog() {
      const log = new Date().toUTCString() + 'BizInfo' + 'uploadWhenOk'
      wx.setStorageSync('onNetworkStatusChangeLog', log)
    }
    onLaunch() {
      const updateManager = wx.getUpdateManager()
      updateManager.onCheckForUpdate(function(res) {
        // 请求完新版本信息的回调
        console.log(res)
        console.log(res.hasUpdate)
      })
      updateManager.onUpdateReady(function() {
        wx.showModal({
          title: '更新提示',
          content: '新版本已经准备好，是否重启应用？',
          success: function(res) {
            if (res.confirm) {
              // 新的版本已经下载好，调用 applyUpdate 应用新版本并重启
              updateManager.applyUpdate()
            }
          }
        })
      })
      updateManager.onUpdateFailed(function() {
        // 新的版本下载失败
      })
      let that = this
      wx.onNetworkStatusChange(function(res) {
        that.networkStatusChangeLog()
        wx.setStorageSync('onNetworkStatusChange', res)
        if (!res.isConnected) {
          wx.showToast({
            title: '无网络',
            icon: 'loading',
            duration: 2000
          })
        }
      })
    }
    sleep(s) {
      return new Promise((resolve, reject) => {
        setTimeout(() => {
          resolve('promise resolved')
        }, s * 1000)
      })
    }
    async testAsync() {
      const data = await this.sleep(3)
      console.log(data)
    }
    getUserInfo(cb) {
      const that = this
      if (this.globalData.userInfo) {
        return this.globalData.userInfo
      }
      wepy.getUserInfo({
        success(res) {
          that.globalData.userInfo = res.userInfo
          cb && cb(res.userInfo)
        }
      })
    }
    onShareAppMessage(title = 'MBC') {
      return {
        title: title,
        success: function(res) {},
        fail: function(res) {}
      }
    }
  }
</script>

　　

D:GPUGOMPwepympBMCwepysrcutilswxRequest.js

import wepy from 'wepy'
import util from './util'
import md5 from './md5'
// import tip from './tip'

const appendInfo = () => {
  const API_SECRET_KEY = 'https://github.com/dyq086/wepy-mall/tree/master/src'
  const TIMESTAMP = util.getCurrentTime()
  const SIGN = md5.hex_md5((TIMESTAMP + API_SECRET_KEY).toLowerCase())
  const MORE = 'more......'
  return {
    'API_SECRET_KEY': API_SECRET_KEY,
    'TIMESTAMP': TIMESTAMP,
    'SIGN': SIGN,
    'MORE': MORE
  }
}

const wxRequest = async (params = {}, url) => {
  console.log('wxRequest', params)
  const c = wx.getStorageSync('onNetworkStatusChange')
  if (!c.isConnected) {
    wx.showToast({
      title: '无网络',
      icon: 'loading',
      duration: 2000
    })
    return
  }
  // tip.loading()
  let data = params.query || {}
  const header = params.header || {}
  const isAppend = params.isAppend || false
  if (isAppend) {
    const a = appendInfo()
    for (let k in a) {
      eval('data.' + k + '= a.' + k)
    }
  }
  let res = await wepy.request({
    url: url,
    method: params.method || 'GET',
    data: data,
    header: header
  })
  // tip.loaded()
  console.log('wxRequest', res)
  return res
}

module.exports = {
  wxRequest
}

　　

    globalData = {
      userInfo: null,
      onNetworkStatusChangeRes:{}
    }
    constructor() {
      super()
      this.use('requestfix')
      this.use('promisify')
    }
    networkStatusChangeLog() {
      const log = new Date().toUTCString() + 'BizInfo' + 'uploadWhenOk'
      wx.setStorageSync('onNetworkStatusChangeLog', log)
    }
    onLaunch() {
      const updateManager = wx.getUpdateManager()
      updateManager.onCheckForUpdate(function(res) {
        // 请求完新版本信息的回调
        console.log(res)
        console.log(res.hasUpdate)
      })
      updateManager.onUpdateReady(function() {
        wx.showModal({
          title: '更新提示',
          content: '新版本已经准备好，是否重启应用？',
          success: function(res) {
            if (res.confirm) {
              // 新的版本已经下载好，调用 applyUpdate 应用新版本并重启
              updateManager.applyUpdate()
            }
          }
        })
      })
      updateManager.onUpdateFailed(function() {
        // 新的版本下载失败
      })
      let that = this
      wx.onNetworkStatusChange(function(res) {
        that.networkStatusChangeLog()
        that.globalData.onNetworkStatusChangeRes=res
        if (!res.isConnected) {
          wx.showToast({
            title: '无网络',
            icon: 'loading',
            duration: 2000
          })
        }
      })
    }