topic Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse? in TapLinx SDK, TagWriter and TagInfo

Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse?

sh4 — Tue, 05 Nov 2024 15:07:30 GMT

according to UG10045 I setup the project, but apduExchange method not calling. Can you provide the sample project or detail about how to initialise TLLibraryManager and create instance.

Re: Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse?

DamianD — Fri, 08 Nov 2024 08:03:41 GMT

1. header files are lying - you have to return IOSByteArray from apduExchange method, not TL_TagAPDUResponse. As for calling your apduExchange method, do something like this:

Taplinx.iOS.TapLinxLibrary.SharedLibrary.VerifyLicense(licenseKey, (success, errMsg) => { if (success == true) { NFCTagReaderSession = new NFCTagReaderSession(NFCPollingOption.Iso14443 , this, DispatchQueue.DefaultGlobalQueue); NFCTagReaderSession.BeginSession(); TLLibraryManager.Shared.SetApduHandlerWithApduHandler(apduHandler); } });

and in tag detection event, just connect tag to session and call appropriate methods, example:

TLLibraryManager.Shared.GetTagDetailsOnCompletion

Re: Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse?

sh4 — Fri, 08 Nov 2024 09:47:36 GMT

I have a Mifare Desfire EV2 tag and when I am creating an instance like that TLLibraryManager.shared() and the application getting crashes and return an error

error: memory read failed for 0x24.

I detected a tag in this method

func tagReaderSession(_ session: NFCTagReaderSession, didDetect tags: [NFCTag]).

can you please share more details or the sample app for reference?

Re: Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse?

DamianD — Fri, 08 Nov 2024 10:01:18 GMT

there is no sample app that i know of, i also asked here about it and got no helpful answer. On what line exactly does you app crashes? show some code

Re: Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse?

sh4 — Fri, 08 Nov 2024 10:23:16 GMT

func beginSession() {

guard NFCTagReaderSession.readingAvailable else {

onError?("NFC not supported on this device.")

return

}

session = NFCTagReaderSession(pollingOption: [.iso14443], delegate: self, queue: queue)

session?.alertMessage = "Hold your iPhone near the NFC tag."

session?.begin()

self.handler = TapLinxApduHandler()

self.handler?.delegate = self

TLLibraryManager.shared().setApduHandlerWithApduHandler(handler)

}

when I define TLLibraryManager.shared() then it getting crash with error

error: memory read failed for 0x10.

Re: Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse?

DamianD — Fri, 08 Nov 2024 10:25:53 GMT

call first TapLinxLibrary.SharedLibrary.VerifyLicense - does it also crash on call to verifyLicense?

Re: Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse?

sh4 — Fri, 08 Nov 2024 11:15:49 GMT

No, not crash on that.

and I got it.

"Online license verified successfully, time to explore Taplinx Library"

Re: Taplinx iOS - apduExchange(withByteArray apduData: Data) -> TL_TagAPDUResponse?

DamianD — Fri, 08 Nov 2024 11:24:54 GMT

ok, please take a look at https://community.nxp.com/t5/TapLinx-SDK-TagWriter-and/Taplinx-iOS-appcrash-on-tag-response/m-p/1991020/highlight/false#M57 and see if sample code in swift posted there by nxp employee helps you. You will have to move setting apduHandler into tag detected event because reader needs access to that tag.