CharacterSetRule

public class CharacterSetRule: Rule

CharacterSetRule is a subclass of Rule. It is used to validate IPV4 address fields.

  • Initializes a CharacterSetRule object to verify that field has valid set of characters.

    Declaration

    Swift

    public init(characterSet: NSCharacterSet, message: String = "Enter valid alpha")

    Parameters

    characterSet

    NSCharacterSet that holds group of valid characters.
    message

    String of error message.

    Return Value

    An initialized object, or nil if an object could not be created for some reason that would not result in an exception.

  • Used to validate field.

    Declaration

    Swift

    public func validate(value: String) -> Bool

    Parameters

    value

    String to checked for validation.

    Return Value

    Boolean value. True if validation is successful; False if validation fails.

  • Displays error message when text field fails validation.

    Declaration

    Swift

    public func errorMessage() -> String

    Return Value

    String of error message.