小程序获取当前网络状态并提示用户网络状态

app.js的onLaunch方法里添加

    // 获取当前网络状态
    wx.onNetworkStatusChange(function (res) {
      var networkType = res.networkType
      var isConnected = res.isConnected
      console.log(networkType, isConnected)
      if (isConnected != true) {
        wx.showToast({
          title: "网络无服务",
          icon: "none"
        })
        return
      }
      wx.showToast({
        title: "当前网络状态为：" + networkType,
        icon: "none"
      })
    })