Auto NSCoding?

Example.m

    TestModel *model = [TestModel new];
    model.aString = @"abc";
    model.aDate = [NSDate new];
    model.anURL = [NSURL URLWithString:@"http://inferis.org"];
    model.subModel = [SubModel new];
    model.subModel.aNumber = @123;
    model.subModel.aValue = [NSValue valueWithCGAffineTransform:CGAffineTransformIdentity];
    model.things = @[[SubModel new], [TestModel new]];
    model.reference = @{ @"sm": [SubModel new] };
    
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:model];
    TestModel *model2 = [NSKeyedUnarchiver unarchiveObjectWithData:data];
    
    [model isEqual:model2] // true

SubModel.m

@interface SubModel : NSObject

@property (nonatomic, strong) NSNumber *aNumber;
@property (nonatomic, strong) NSValue *aValue;

@end

@implementation SubModel 

II_AUTO_NSCODING()

@end

TestModel.m

@interface TestModel : NSObject

@property (nonatomic, strong, readonly) NSString *suchReadOnly;
@property (nonatomic, strong) NSString *aString;
@property (nonatomic, strong) NSDate *aDate;
@property (nonatomic, strong, getter=getTheURL) NSURL *anURL;
@property (nonatomic, assign, setter=setTheBool:) BOOL aBool;
@property (nonatomic, assign) NSInteger anInteger;
@property (nonatomic, strong) SubModel *subModel;
@property (nonatomic, strong) NSArray *things;
@property (nonatomic, strong) NSDictionary *reference;

@end

@implementation TestModel 

II_AUTO_NSCODING()

@end