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# NFCReaderSession

The abstract base class that represents a reader session for detecting NFC tags.

```
class NFCReaderSession
```

## Overview

You do not create instances of this class. Instead, you create and use an instance of [`NFCNDEFReaderSession`](/documentation/CoreNFC/NFCNDEFReaderSession) or [`NFCTagReaderSession`](/documentation/CoreNFC/NFCTagReaderSession). Only one reader session of any type can be active in the system at a time. The system puts additional sessions in a queue and processes them in FIFO order.

## Topics

### Determining Tag Reading Capability

[`readingAvailable`](/documentation/CoreNFC/NFCReaderSession-swift.class/readingAvailable)

A Boolean value that determines whether the device supports NFC tag reading.

### Working with a Session

[`delegate`](/documentation/CoreNFC/NFCReaderSession-swift.class/delegate)

The delegate of the reader session.

[`sessionQueue`](/documentation/CoreNFC/NFCReaderSession-swift.class/sessionQueue)

The queue on which the reader session delegate callbacks and completion block handlers are dispatched.


---

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