AppCode can generate all you need for a value object. Wow.

RSLRandomValueObject.h

#import <Foundation/Foundation.h>

@interface RSLRandomValueObject : NSObject<NSCopying, NSCoding>
/* The @property bits are the only code I wrote. */
@property(copy) NSString *name;
@property NSNumber *someNumber;
@property BOOL supYo;

/* Everything else in here and the implementation file
 * was generate by AppCode, either by the New File
 * or by picking an option from Code > Generate.
 */

- (instancetype)initWithName:(NSString *)name
                  someNumber:(NSNumber *)someNumber
                       supYo:(BOOL)supYo;

+ (instancetype)objectWithName:(NSString *)name
                    someNumber:(NSNumber *)someNumber
                         supYo:(BOOL)supYo;

- (BOOL)isEqual:(id)other;

- (BOOL)isEqualToObject:(RSLRandomValueObject *)object;

- (NSUInteger)hash;

- (NSString *)description;

- (id)copyWithZone:(NSZone *)zone;

- (id)initWithCoder:(NSCoder *)coder;

- (void)encodeWithCoder:(NSCoder *)coder;
@end

RSLRandomValueObject.m

#import "RSLRandomValueObject.h"

@implementation RSLRandomValueObject
- (id)initWithCoder:(NSCoder *)coder
{
    self = [super init];
    if (self) {
        self.name = [coder decodeObjectForKey:@"self.name"];
        self.someNumber = [coder decodeObjectForKey:@"self.someNumber"];
        self.supYo = [coder decodeBoolForKey:@"self.supYo"];
    }

    return self;
}

- (void)encodeWithCoder:(NSCoder *)coder
{
    [coder encodeObject:self.name forKey:@"self.name"];
    [coder encodeObject:self.someNumber forKey:@"self.someNumber"];
    [coder encodeBool:self.supYo forKey:@"self.supYo"];
}

- (instancetype)initWithName:(NSString *)name
                  someNumber:(NSNumber *)someNumber
                       supYo:(BOOL)supYo
{
    self = [super init];
    if (self) {
        _name = [name copy];
        _someNumber = someNumber;
        _supYo = supYo;
    }

    return self;
}

+ (instancetype)objectWithName:(NSString *)name
                    someNumber:(NSNumber *)someNumber
                         supYo:(BOOL)supYo
{
    return [[self alloc] initWithName:name someNumber:someNumber supYo:supYo];
}


- (id)copyWithZone:(NSZone *)zone
{
    RSLRandomValueObject *copy = [[[self class] allocWithZone:zone] init];

    if (copy != nil) {
        copy.name = self.name;
        copy.someNumber = self.someNumber;
        copy.supYo = self.supYo;
    }

    return copy;
}


- (NSString *)description
{
    NSMutableString *description = [NSMutableString stringWithFormat:@"<%@: ",
                                                                     NSStringFromClass(
                                                                             [self class])];
    [description appendFormat:@"self.name=%@", self.name];
    [description appendFormat:@", self.someNumber=%@", self.someNumber];
    [description appendFormat:@", self.supYo=%d", self.supYo];
    [description appendString:@">"];
    return description;
}

- (BOOL)isEqual:(id)other
{
    if (other == self)
        return YES;
    if (!other || ![[other class] isEqual:[self class]])
        return NO;

    return [self isEqualToObject:other];
}

- (BOOL)isEqualToObject:(RSLRandomValueObject *)object
{
    if (self == object)
        return YES;
    if (object == nil)
        return NO;
    if (self.name != object.name && ![self.name isEqualToString:object.name])
        return NO;
    if (self.someNumber != object.someNumber && ![self.someNumber isEqualToNumber:object
            .someNumber])
        return NO;
    if (self.supYo != object.supYo)
        return NO;
    return YES;
}

- (NSUInteger)hash
{
    NSUInteger hash = [self.name hash];
    hash = hash * 31u + [self.someNumber hash];
    hash = hash * 31u + self.supYo;
    return hash;
}

@end