NSCoding

NSCoding

NSCoding
===

Person.h

//
//  Person.h
//  NSCoding
//
//  Created by matrixfox on 12/22/14.
//  Copyright (c) 2014 matrixfox. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Person : NSObject <NSCoding>
#define nameKey @"name"
#define ageKey @"age"
#define heightKey @"height"
#define genderKey @"gender"
#define personKey @"person"

@property (strong, nonatomic) NSString *name;
@property (nonatomic) int age;
@property float height;
@property char gender;

- (id) initWithName:(NSString *)n age:(int)a height:(float)h gender:(char)g;

@end

Person.m

//
//  Person.m
//  NSCoding
//
//  Created by matrixfox on 12/22/14.
//  Copyright (c) 2014 matrixfox. All rights reserved.
//

#import "Person.h"

@implementation Person

@synthesize age;
@synthesize name;
@synthesize height;
@synthesize gender;

// Person.h custom method
- (id) initWithName:(NSString *)n
                age:(int)a
             height:(float)h
             gender:(char)g
{
    // Call supercalls designated initalizer
    self = [super init];
    // Did the superclass initalizer succeed?
    if (self) {
        // Give the instance variables inital values
        self.name = n;
        self.age = a;
        self.height = h;
        self.gender = g;
    }
    
    // Return the address of the new initalized object
    return self;
}

- (id)init
{
    return [self initWithName:@""
                          age:0
                       height:0.0
                       gender:gender];
}

- (NSString *)description
{
    NSString *descriptionString = [[NSString alloc] initWithFormat:@"%@, %d, %f, %c",
                                   self.name,
                                   self.age,
                                   self.height,
                                   self.gender];
    
    return descriptionString;
}

- (void) dealloc
{
    NSLog(@"Destoryed: %@", self);
}

// NSCoding
// Unserializing
- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super init];
    
    if (self) {
        name = [aDecoder decodeObjectForKey:nameKey];
        age = [aDecoder decodeIntForKey:ageKey];
        height = [aDecoder decodeFloatForKey:heightKey];
        gender = [aDecoder decodeIntForKey:genderKey];
    }
    return self;
}

// Serializing
- (void) encodeWithCoder:(NSCoder *)aCoder
{
    [aCoder encodeObject:self.name forKey:nameKey];
    [aCoder encodeInt:self.age forKey:ageKey];
    [aCoder encodeFloat:self.height forKey:heightKey];
    [aCoder encodeInt:self.gender forKey:genderKey];
}

@end

ViewController.h

//
//  ViewController.h
//  NSCoding
//
//  Created by matrixfox on 12/22/14.
//  Copyright (c) 2014 matrixfox. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController


@end

ViewController.m

//
//  ViewController.m
//  NSCoding
//
//  Created by matrixfox on 12/22/14.
//  Copyright (c) 2014 matrixfox. All rights reserved.
//

#import "ViewController.h"
#import "Person.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    // Building Array
    NSMutableArray *people = [[NSMutableArray alloc] init];
    [people addObject:[[Person alloc] initWithName:@"Jane" age:33 height:5.33 gender:'f']];
    [people addObject:[[Person alloc] initWithName:@"Mike" age:28 height:6.2 gender:'m']];
    [people addObject:[[Person alloc] initWithName:@"Marry" age:39 height:5.5 gender:'f']];
    
    // NSCoding
    NSMutableData *data = [[NSMutableData alloc] init];
    NSKeyedArchiver *arch = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    [arch encodeObject:people forKey:personKey];
    [arch finishEncoding];
    
    NSMutableArray *otherPeople = [[NSMutableArray alloc] init];
    
    NSKeyedUnarchiver *unarch = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
    otherPeople = [unarch decodeObjectForKey:personKey];
    [unarch finishDecoding];
    
    // Testing Loop
    for (Person *p in otherPeople) {
        NSLog(@"%@", p);
    }
    
    }

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end