Instance Method

contains(_:)

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

Declaration

func contains(_ str: String) -> Bool

Parameters

str

The string to search for. This value must not be nil.

Return Value

true if the receiver contains str, otherwise false.

Discussion

Calling this method is equivalent to calling range(of:options:) with no options.

See Also

Finding Characters and Substrings

func localizedCaseInsensitiveContains(String)

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

func localizedStandardContains(String)

Returns a Boolean value indicating whether the string 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 string of the first character from a given character set.

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

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

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

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

func range(of: String)

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

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

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