public override async void DidDetectTags(NFCNdefReaderSession session, INFCNdefTag[] tags)
{
System.Diagnostics.Debug.WriteLine("========> DidDetectTags");
_tag = tags[0];
await session.ConnectToTagAsync(_tag);
TagDetected?.Invoke(this, new NfcTagDetectedEventArgs(
tagId: string.Empty, //// TODO: CHECK HOW TO GET ID
ndefMessage: await ReadNdefAsync()));
}
public override void DidDetectTags(NFCNdefReaderSession session, INFCNdefTag[] tags)
{
//Connect with the NDEF Tag
tag = tags[0];
Session = session;
session.ConnectToTag(tag, delegate { });
Action <NFCNdefMessage, NSError> readValues;
readValues = ReadValues;
tag.ReadNdef(readValues); //Read NDEF tag and then encrypt the nonce
}
/// <summary>
/// Returns NFC Tag identifier
/// </summary>
/// <param name="tag"><see cref="INFCNdefTag"/></param>
/// <returns>Tag identifier</returns>
byte[] GetTagIdentifier(INFCNdefTag tag)
{
byte[] identifier = null;
if (tag is INFCMiFareTag mifareTag)
{
identifier = mifareTag.Identifier.ToByteArray();
}
else if (tag is INFCFeliCaTag felicaTag)
{
identifier = felicaTag.CurrentIdm.ToByteArray();
}
else if (tag is INFCIso15693Tag iso15693Tag)
{
identifier = iso15693Tag.Identifier.ToByteArray();
}
else if (tag is INFCIso7816Tag iso7816Tag)
{
identifier = iso7816Tag.Identifier.ToByteArray();
}
return(identifier);
}
/// <summary>
/// Returns NFC Tag identifier
/// </summary>
/// <param name="tag"><see cref="INFCNdefTag"/></param>
/// <returns>Tag identifier</returns>
public static byte[] GetTagIdentifier(INFCNdefTag tag, ref string technology)
{
byte[] identifier = null;
if (tag is INFCMiFareTag mifareTag)
{
technology = "MiFare";
identifier = mifareTag.Identifier.ToByteArray();
NFCMiFareFamily f = mifareTag.GetMifareFamily();
if (f == NFCMiFareFamily.Ultralight)
{
technology = "MiFare Ultralight";
}
else if (f == NFCMiFareFamily.Plus)
{
technology = "MiFare Plus";
}
else if (f == NFCMiFareFamily.DesFire)
{
technology = "MiFare DesFire";
}
}
else if (tag is INFCFeliCaTag felicaTag)
{
technology = "Felica";
identifier = felicaTag.CurrentIdm.ToByteArray();
}
else if (tag is INFCIso15693Tag iso15693Tag)
{
technology = "Iso15693";
identifier = iso15693Tag.Identifier.ToByteArray();
}
else if (tag is INFCIso7816Tag iso7816Tag)
{
technology = "Iso7816";
identifier = iso7816Tag.Identifier.ToByteArray();
}
return(identifier);
}
void MakeTagReadOnly(NFCTagReaderSession session, INFCTag tag, INFCNdefTag ndefTag)
{
session.ConnectTo(tag, (error) =>
{
if (error != null)
{
Console.WriteLine(error.LocalizedDescription);
return;
}
ndefTag.WriteLock((error) =>
{
if (error != null)
{
Console.WriteLine("Error when locking a tag on iOS: " + error.LocalizedDescription);
}
else
{
Console.WriteLine("Locking Successful!");
}
});
});
}
/// <summary>
/// Writes or clears a TAG
/// </summary>
/// <param name="session"><see cref="NFCTagReaderSession"/></param>
/// <param name="tag"><see cref="INFCNdefTag"/></param>
/// <param name="tagInfo"><see cref="ITagInfo"/></param>
/// <param name="clearMessage">Clear message</param>
void ExecuteWriteOrClear(NFCTagReaderSession session, INFCNdefTag tag, ITagInfo tagInfo, bool clearMessage = false)
{
tag.QueryNdefStatus((status, capacity, error) =>
{
if (error != null)
{
Invalidate(session, error.LocalizedDescription);
return;
}
if (status == NFCNdefStatus.ReadOnly)
{
Invalidate(session, UIMessages.NFCErrorReadOnlyTag);
return;
}
if (Convert.ToInt32(capacity) < NFCUtils.GetSize(tagInfo.Records))
{
Invalidate(session, UIMessages.NFCErrorCapacityTag);
return;
}
NFCNdefMessage message = null;
if (!clearMessage)
{
session.AlertMessage = UIMessages.NFCSuccessWrite;
var records = new List <NFCNdefPayload>();
for (var i = 0; i < tagInfo.Records.Length; i++)
{
var record = tagInfo.Records[i];
if (GetiOSPayload(record) is NFCNdefPayload ndefPayload)
{
records.Add(ndefPayload);
}
}
if (records.Any())
{
message = new NFCNdefMessage(records.ToArray());
}
}
else
{
session.AlertMessage = UIMessages.NFCSuccessClear;
message = GetEmptyNdefMessage();
}
if (message != null)
{
tag.WriteNdef(message, (error) =>
{
if (error != null)
{
Invalidate(session, error.LocalizedDescription);
return;
}
tagInfo.Records = GetRecords(message.Records);
OnMessagePublished?.Invoke(tagInfo);
Invalidate(NfcSession);
});
}
else
{
Invalidate(session, UIMessages.NFCErrorWrite);
}
});
}
