---
title: isKnownNFC
framework: swift
role: symbol
role_heading: Instance Property
path: swift/utf8span/isknownnfc
---

# isKnownNFC

Returns whether the contents are known to be NFC. This is not always checked at initialization time and is set by checkForNFC.

## Declaration

```swift
var isKnownNFC: Bool { get }
```

## Discussion

Discussion note: O(1)