LengthRule

public class LengthRule : ValidationRule<String>

LengthRule is a subclass of ValidationRule that defines how length is validated with min & max limits.

  • Initializes a LengthRule object to verify that length of value is in the range of min & max.

    Declaration

    Swift

    public init(min: Int, max: Int, message: String? = nil)

    Parameters

    min

    Minimum required length of value.
    max

    Maximum required length of value.
    message

    String of error message.

    Return Value

    An initialized object.

  • Method used to validate the provided value.

    Declaration

    Swift

    public override func validate(_ value: String?) -> String?

    Parameters

    value

    String value to be checked for validation.

    Return Value

    Error Message String. nil if validation is successful; String if validation fails.