NFCReadCard: function(){     let _this = this     let adapter = wx.getNFCAdapter()     console.log(adapter)     adapter.startDiscovery({success:(e)=>{       console.log('开始监听贴卡',e)       adapter.onDiscovered(function (res){         console.log('读到卡片了', res);         //console.log(res.techs);            if(res.techs.includes(adapter.tech.nfcA)){           console.log('发现'+adapter.tech.nfcA+'卡');               let nfcA = adapter.getNfcA();           app.nfcA = nfcA;              nfcA.connect({             success: function(res){               console.log('设备已连接', res)               nfcA.transceive({                 data:new ArrayBuffer(0),                 success: function(res){                   console.log('发送数据成功, 接收数据如下:', res);                 },                 fail: function(err){                   console.log('发送数据失败', err);                 }               })             },             fail: function(err){               console.log('设备联接错误', err);             }           });         }       })     }})   }