---
title: disallowedEncodingsKey
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/stringencodingdetectionoptionskey/disallowedencodingskey
---

# disallowedEncodingsKey

## Declaration

```swift
static let disallowedEncodingsKey: StringEncodingDetectionOptionsKey
```

## Discussion

Discussion Option specifying any string encodings not to be considered. The corresponding value for this key is an NSArray of NSNumber objects that contain NSStringEncoding values. If this option is unspecified, no additional string encodings are removed from consideration.

## See Also

### Type Properties

- [allowLossyKey](foundation/stringencodingdetectionoptionskey/allowlossykey.md)
- [fromWindowsKey](foundation/stringencodingdetectionoptionskey/fromwindowskey.md)
- [likelyLanguageKey](foundation/stringencodingdetectionoptionskey/likelylanguagekey.md)
- [lossySubstitutionKey](foundation/stringencodingdetectionoptionskey/lossysubstitutionkey.md)
- [suggestedEncodingsKey](foundation/stringencodingdetectionoptionskey/suggestedencodingskey.md)
- [useOnlySuggestedEncodingsKey](foundation/stringencodingdetectionoptionskey/useonlysuggestedencodingskey.md)