getInitialMedia doesn't work

[Asanas81]

I have tried getInitialMedia in iOS, but it returns empty value

here is my Code try {
ReceiveSharingIntent.instance.getInitialMedia().then((List value) {
print(value.toString());
ShowDialog.showDialogTitle(context, 'Testdata15', value.toString());
WidgetsBinding.instance.addPostFrameCallback((_) {
ShowDialog.showDialogTitle(context, 'Testdata', 'content');
print('getInitialMedia');
setState(() {
_sharedFiles.clear();
_sharedFiles.addAll(value);
// print(_sharedFiles.map((f) => f.toMap()));
if (_sharedFiles.isNotEmpty) {
ShowDialog.showDialogTitle(context, 'Testdata12', _sharedFiles.first.path);
} else {
ShowDialog.showDialogTitle(context, 'Testdata13', 'empty');
}

        // Tell the library that we are done processing the intent.
        // ReceiveSharingIntent.instance.reset();
      });
    });
  });
} catch (e, stackTrace) {
  ShowDialog.showDialogTitle(context, 'Testdata7', e.toString());

  print("Error receiving shared files: $e");
  print(stackTrace);
}

the function ShowDialog.showDialogTitle returns message title (Testdata13 for example) and content (for example 'empty') , so i can test the function in Testversion,because print is not available when the app is started through shared file

class ShowDialog {
static Future showDialogTitle(BuildContext context, String title, String content) async {
return await showDialog(
context: context,
builder: (BuildContext context) {
return AlertDialog(
title: Text(title),
content: Text(content),
actions: [
TextButton(
child: Text('OK'),
onPressed: () {
Navigator.of(context).pop(); // Затваря диалога
},
),
],
);
},
);
}
}

is there any special settings for iOS to read files when the application is closed