Instance Method

rangeOfCharacter(from:options:range:)

Finds and returns the range in the receiver of the first character from a given character set found in a given range with given options.

Declaration

func rangeOfCharacter(from searchSet: CharacterSet, options mask: NSString.CompareOptions = [], range rangeOfReceiverToSearch: NSRange) -> NSRange

Parameters

aSet

A character set. This value must not be nil.

Raises an NSInvalidArgumentException if aSet is nil.

mask

A mask specifying search options. The following options may be specified by combining them with the C bitwise OR operator: anchored, backwards.

aRange

The range in which to search. aRange must not exceed the bounds of the receiver.

Raises an rangeException if aRange is invalid.

Return Value

The range in the receiver of the first character found from aSet within aRange. Returns a range of {NSNotFound, 0} if none of the characters in aSet are found.

Discussion

This method does not perform any Unicode normalization on the receiver, so canonically equivalent forms will not be matched. For example, searching the string “strüdel”—containing the decomposed characters “u” (U+0075 LATIN SMALL LETTER U) and “¨” (U+0308 COMBINING DIAERESIS)—with a character set containing the precomposed character “ü” (U+00FC LATIN SMALL LETTER U WITH DIAERESIS) would return the range {NSNotFound, 0}, because none of the characters in the set are found.

See Also

Finding Characters and Substrings

func contains(String)

Returns whether the receiver contains a given string by performing a case-sensitive, locale-unaware search.

func localizedCaseInsensitiveContains(String)

Returns whether the receiver contains a given string by performing a case-insensitive, locale-aware search.

func localizedStandardContains(String)

Returns whether the receiver contains a given string by performing a case and diacritic insensitive, locale-aware search.

func rangeOfCharacter(from: CharacterSet)

Finds and returns the range in the receiver of the first character from a given character set.

func rangeOfCharacter(from: CharacterSet, options: NSString.CompareOptions = [])

Finds and returns the range in the receiver of the first character, using given options, from a given character set.

func range(of: String)

Finds and returns the range of the first occurrence of a given string within the receiver.

func range(of: String, options: NSString.CompareOptions = [])

Finds and returns the range of the first occurrence of a given string within the receiver, subject to given options.

func range(of: String, options: NSString.CompareOptions = [], range: NSRange)

Finds and returns the range of the first occurrence of a given string, within the given range of the receiver, subject to given options.

func range(of: String, options: NSString.CompareOptions = [], range: NSRange, locale: Locale?)

Finds and returns the range of the first occurrence of a given string within a given range of the receiver, subject to given options, using the specified locale, if any.

func localizedStandardRange(of: String)

Finds and returns the range of the first occurrence of a given string within the receiver by performing a case and diacritic insensitive, locale-aware search.