---
title: "init(bitmapRepresentation:)"
framework: foundation
role: symbol
role_heading: Initializer
path: "foundation/nsmutablecharacterset/init(bitmaprepresentation:)"
---

# init(bitmapRepresentation:)

Returns a character set containing characters determined by a given bitmap representation.

## Declaration

```swift
init(bitmapRepresentation data: Data)
```

## See Also

### Creating Custom Character Sets

- [init(charactersIn:)](foundation/nsmutablecharacterset/init(charactersin:).md)
- [init(range:)](foundation/nsmutablecharacterset/init(range:).md)
- [init(contentsOfFile:)](foundation/nsmutablecharacterset/init(contentsoffile:).md)