---
title: NSFileHandleNotificationDataItem
framework: foundation
role: symbol
role_heading: Global Variable
path: foundation/nsfilehandlenotificationdataitem
---

# NSFileHandleNotificationDataItem

A key in the userinfo dictionary in a readCompletionNotification and NSFileHandleReadToEndOfFileCompletion.

## Declaration

```swift
let NSFileHandleNotificationDataItem: String
```

## Discussion

Discussion The corresponding value is an NSData object containing the available data read from a socket connection.

## See Also

### Constants

- [NSFileHandleNotificationFileHandleItem](foundation/nsfilehandlenotificationfilehandleitem.md)
- [NSFileHandleNotificationMonitorModes](foundation/nsfilehandlenotificationmonitormodes.md)