https://developers.weixin.qq.com/miniprogram/dev/framework/release/

https://developers.weixin.qq.com/miniprogram/dev/api/device/nfc/NFCAdapter.onDiscovered.html

我用开发工具连接手机，真机调试。发现

res没有 messages 属性，res 的值是这个techs: (2) ["NFC-A", "MIFARE Classic"]

手机小米6，MIUI 10.4.2，安卓9

代码如下：

const app = getApp()

Page({

  data: {

    nfc: null

  },

  onLoad: function () {

    var that = this;

    that.setData({

      nfc: wx.getNFCAdapter()

    })

    that.data.nfc.startDiscovery({

      fail(err) {

        console.log(err)

      }

    })

    that.data.nfc.onDiscovered((res) => {

      console.log(res)

    })

  },

  onHide() {

    if (this.data.nfc) {

      this.data.nfc.stopDiscovery()

    }

  }

})