---
title: featureIdentifier
framework: uikit
role: symbol
role_heading: Type Property
path: uikit/uifontdescriptor/featurekey/featureidentifier
---

# featureIdentifier

A key for identifying a font feature type.

## Declaration

```swift
static let featureIdentifier: UIFontDescriptor.FeatureKey
```

## See Also

### Deprecated

- [typeIdentifier](uikit/uifontdescriptor/featurekey/typeidentifier.md)