Sends a Read Single Block command (0x20 command code), as defined in the ISO 15693-3 specification, to the tag.
- iOS 13.0+
- Mac Catalyst 13.0+
- Core NFC
The number of the block to read. Blocks are numbered from 0 to 255 inclusively.
A handler that the reader session invokes after the operation completes. The session calls completionHandler on the dispatch queue that you provided when creating the NFCTagReaderSession object.
The handler has the following parameters:
nilwhen the operation is successful; otherwise, an
NSErrorobject indicating that a problem occurred while communicating with the tag.
When the tag responds with a command error, the error's
userdirectory contains the
NFCISO15693Tagand the error's
Response Error Key
codeproperty has a value defined in the ISO15693-3 specification.
This method sends the tag's
identifier with the command.