const app = getApp()


Page({
  nfc: null,


  onLoad: function () {
    const nfc = wx.getNFCAdapter()
    this.nfc = nfc


    function discoverHandler(res) {
      console.log("discoverHandler")
      console.log(res)


      if (res.techs.includes("NFC-V")) {
        const nfcV = nfc.getNfcV()
        nfcV.connect({
          complete(res) {
                console.log('res:', res)
              }
        })
        // nfcV.transceive({
        //   data: new ArrayBuffer(0),
        //   complete(res) {
        //     console.log('res:', res)
        //   }
        // })
        return
      }
    }


    nfc.onDiscovered(discoverHandler)
    nfc.startDiscovery({
      success(res){
        console.log(res)
      },
      fail(err) {
        console.log('failed to discover:', err)
      }
    })
  },


  onHide() {
    if (this.nfc) {
      this.nfc.stopDiscovery()
    }
  }
})

同一台手机，使用app可以正常写入。但是使用小程序后就是报{errMsg: "connect:fail:NFC tag has not been discovered", errCode: 13013}