tag(at:scheme:tokenRange:sentenceRange:)
Returns a tag for a single scheme at the specified character position.
Declaration
func tag(at charIndex: Int, scheme: NSLinguisticTagScheme, tokenRange: NSRangePointer?, sentenceRange: NSRangePointer?) -> NSLinguisticTag?Parameters
- charIndex:
The position of the initial character.
- scheme:
The tag scheme. See Nslinguistictagscheme for the possible values.
- tokenRange:
A pointer to the token range.
- sentenceRange:
A pointer to the range of the sentence.
Return Value
Returns the tag for the requested tag scheme, or nil. If a tag is returned, this function returns by reference the range of the token to tokenRange, and the range of the enclosing sentence to sentenceRange, if applicable.
Discussion
This is a convenience method for calling tag(at:unit:scheme:tokenRange:) and passing NSLinguisticTaggerUnit.word as the linguistic unit.