NFC Plugin: Transceive is not returning the status bits on iOS

[cmays20]

Hello,

I am new to this plugin, so forgive me if I am just not using it properly. I am using the transceive method to send commands to an NFC Chip. It seems like the Number[] being returned contains the response bits, but it doesn't contain the status bits (typically the last two bits in the array). On Android, we are getting the last two bits. Is anyone else seeing this behavior? Is there a way to make it get the full return payload? Should the TransceiveResult object contain a separate field for the status bits?

Thanks!

[robingenz]

Hi @cmays20,

thank you for reaching out. The implementation of the transceive method is unfortunately very different on Android and iOS, as both platforms offer very different APIs. It is therefore possible that the plugin behaves differently on the two platforms. However, this is by no means intentional and I want to fix it, if that's the case. Do you have any more information for me?

For example:

• What does your implementation look like?
• Which tag is it?
• What commands are you sending?
• What does the response look like on Android and iOS?

I assume that an error is thrown on iOS in case of an error and Android communicates this via the status bits instead. Can you confirm this assumption?

[hodirt]

@robingenz Hi!

Here's the way I fixed it.
This is the part of code from Nfc.swift from your lib

and I changed it to "one" and "two" (as I named) parameters represent to last bytes that represent the status, which is needed to validate transceive response and everything. And for some reason those 2 bytes/parameters are omitted in the lib's code.

I believe that the way I did it may be the fix

[robingenz]

@hodirt Thank you! Good catch. I will publish a fix tomorrow.

[robingenz]

This is now fixed in version 6.5.1.