NSCoding protocol

Contato.h

#import <Foundation/Foundation.h>
@interface Contato : NSObject <NSCoding>

@property (nonatomic, retain) NSString *nome;
@property (nonatomic, retain) NSString *email;
@property (nonatomic, retain) NSString *endereco;
@property (nonatomic, retain) NSString *telefone;
@property (nonatomic, retain) NSString *site;
@property (nonatomic, retain) UIImage *imagem;

@end

Contato.m

#import "Contato.h"

@implementation Contato

@synthesize nome, site, email, imagem, endereco, telefone;

- (void)encodeWithCoder:(NSCoder *)aCoder {
    [aCoder encodeObject:nome forKey:@"nome"];
    [aCoder encodeObject:site forKey:@"site"];
    [aCoder encodeObject:email forKey:@"email"];
    [aCoder encodeObject:imagem forKey:@"imagem"];
    [aCoder encodeObject:endereco forKey:@"endereco"];
    [aCoder encodeObject:telefone forKey:@"telefone"];
}
- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super init];
    if(self){
        [self setNome:[aDecoder decodeObjectForKey:@"nome"]];
        [self setEndereco:[aDecoder decodeObjectForKey:@"endereco"]];
        [self setSite:[aDecoder decodeObjectForKey:@"site"]];
        [self setImagem:[aDecoder decodeObjectForKey:@"imagem"]];
        [self setEmail:[aDecoder decodeObjectForKey:@"email"]];
        [self setTelefone:[aDecoder decodeObjectForKey:@"telefone"]];
    }
    return self;
}

@end