RequiredRule

public class RequiredRule<V> : ValidationRule<V>

RequiredRule is a subclass of ValidationRule that means value can’t be nil or blank. Make sure required rule is the first item in rules list


                    
                    
                    init(message:)

Initializes a RequiredRule object that will validate a value is not nil.

Swift

public override init(message: String = "can not be blank.")


                                message

String of error message.

An initialized RequiredRule object.


                    
                    
                    validate(_:)

Method used to validate the provided value.

Swift

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


                                value

Any value to be checked for validation.

Error Message. nil if validation is successful; String if validation fails. Returns error for empty string or collection