---
title: "CFStringConvertEncodingToNSStringEncoding(_:)"
framework: corefoundation
role: symbol
role_heading: Function
path: "corefoundation/cfstringconvertencodingtonsstringencoding(_:)"
---

# CFStringConvertEncodingToNSStringEncoding(_:)

Returns the Cocoa encoding constant that maps most closely to a given Core Foundation encoding constant.

## Declaration

```swift
func CFStringConvertEncodingToNSStringEncoding(_ encoding: CFStringEncoding) -> UInt
```

## Parameters

- `encoding`: The Core Foundation string encoding to use.

## Return Value

Return Value The Cocoa encoding (of type NSStringEncoding) that is closest to the Core Foundation encoding encoding. The behavior is undefined if an invalid string encoding is passed.

## Discussion

Discussion The CFStringConvertNSStringEncodingToEncoding(_:) function is complementary to this function.

## See Also

### Working With Encodings

- [CFStringConvertEncodingToIANACharSetName(_:)](corefoundation/cfstringconvertencodingtoianacharsetname(_:).md)
- [CFStringConvertEncodingToWindowsCodepage(_:)](corefoundation/cfstringconvertencodingtowindowscodepage(_:).md)
- [CFStringConvertIANACharSetNameToEncoding(_:)](corefoundation/cfstringconvertianacharsetnametoencoding(_:).md)
- [CFStringConvertNSStringEncodingToEncoding(_:)](corefoundation/cfstringconvertnsstringencodingtoencoding(_:).md)
- [CFStringConvertWindowsCodepageToEncoding(_:)](corefoundation/cfstringconvertwindowscodepagetoencoding(_:).md)
- [CFStringGetFastestEncoding(_:)](corefoundation/cfstringgetfastestencoding(_:).md)
- [CFStringGetListOfAvailableEncodings()](corefoundation/cfstringgetlistofavailableencodings().md)
- [CFStringGetMaximumSizeForEncoding(_:_:)](corefoundation/cfstringgetmaximumsizeforencoding(_:_:).md)
- [CFStringGetMostCompatibleMacStringEncoding(_:)](corefoundation/cfstringgetmostcompatiblemacstringencoding(_:).md)
- [CFStringGetNameOfEncoding(_:)](corefoundation/cfstringgetnameofencoding(_:).md)
- [CFStringGetSmallestEncoding(_:)](corefoundation/cfstringgetsmallestencoding(_:).md)
- [CFStringGetSystemEncoding()](corefoundation/cfstringgetsystemencoding().md)
- [CFStringIsEncodingAvailable(_:)](corefoundation/cfstringisencodingavailable(_:).md)