Ios 14.2(iPhone XR) Dialog NFC scan don't show #23
Comments
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I have two testing devices, the "NFC Scanning Window" shows up on one of my devices but not on the other one.
I also tried a native iOS demo app janlionly/NFCReaderWriter, it works on both devices. But for my case, I need to use flutter. I hope this issue can be fixed. |
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@kensang Can you provide more detail on this, such as the log before / after the |
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@Harry-Chen I just tried to sentry to log my co-worker's result (he is the one using iPhone 11 Pro 14.3), for some reason, this package suddenly works for his phone as well. I am not sure if it's just that there was a mistake with his previous testing or what, but I will let you know what I have done between my previous version and this version just in case: I have done the following:
I then ask my tester with his iPhone 11 Pro 14.3 to do the following:
The result from the tester is that it now works, meaning it can detect the nfc tag id & info correctly. Again, I am not sure if it's a mistake made in previous testing, or is it a re-uploading to testflight, or is it just the "restarting the phone" step. It just works right now. And thank you for your reply. |
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@kensang Actually we have encountered some strange behaviour (bug?) with CoreNFC when developing this library, with the similar situation like you described (not responding to
So I believe rebooting is the magic. Who knows :-( |
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Rebooting doesnt work for me. I'm running in debug mode, press start polling and i get the platform exception. I reboot device, relaunch the app in debug mode and still same issue. Reboot is not a solution. There is something wrong with your library. |
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I have exactly the same issue on iOS 14.2 (iPhone 7 and iPhone SE 2020), also tried out rebooting |
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@devnullpointer Did you get the platform exception directly on the first polling attempt? |
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Hi @devnullpointer and @mbartn , do you have any reproducers? It would be much appreciated if you could provide a reproducer. |
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Hello @dangfan. First of all, thanks for addressing the issue. The steps that I went through
to import 'package:flutter/material.dart';
import 'package:flutter_nfc_kit/flutter_nfc_kit.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Nfc demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Future<void> _readNfc() async {
print("Starting pooling...");
var tag = await FlutterNfcKit.poll();
print("Got it! $tag");
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Text("Hello world!"),
),
floatingActionButton: FloatingActionButton(
onPressed: _readNfc,
child: Icon(Icons.add),
),
);
}
}
and app did nothing, also didn't react on my NFC chip. As you can see app never reached the I also checked logs from XCode but looks like there is also nothing helpful printed. |
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Thanks @mbartn for providing the valuable reproducer. After some trial and error, I found that adding these lines to Info.plist works: Another way is to enable ISO14443 only without changing Info.plist: So I suspect that iOS checks What I have tried:
P.S. device restart is required after testing a non-working scenario due to bug of CoreNFC. In flutter_nfc_kit, the pollingOption passed to iOS by default is [.iso14443, .iso18092, .iso15693] and then CoreNFC might query the Info.plist and found that there are no requested ISO7816 idenfitifers nor FeLiCa system codes and then refuses to show up the scanning window. I am looking at how to make this error visible to user. |
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I have submitted the issue to Apple via Feedback Assistant. |
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Appreciate your help @jiegec, adding flags totally solved my issue 👍 |
Happy to see that!
It is unfortunate that CoreNFC failed without reporting the error to user. |
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Update: Apple says the bug is resolved. |
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Update: the bug has been resolved since iOS 14.6. |
So the removed chunk was fixed 3 years ago, see: nfcim#23 (comment)
In my widget, I call:
print('BEFORE FlutterNfcKit.poll');
var tag = await FlutterNfcKit.poll(
// timeout: Duration(seconds: 600),
iosMultipleTagMessage: "Multiple tags found!",
iosAlertMessage: "Scan your tag");
But dialog NFC scan don't show in iPhone and debug stop at line await FlutterNfcKit.poll(...
Please help me check it
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