...later...

Section missing in the book!!! ...on <NSCoding>

GameState.h

//
// GameState.h
// TicTac
//
// Created by Alessi Patrick on 8/26/11.
// Copyright (c) 2011 __MyCompanyName__. All rights reserved.
//

#import <Foundation/Foundation.h>

typedef enum {
TTxPlayerTurn = 1, // The x player's turn
TToPlayerTurn = 2 // The o player's turn
} TTPlayerTurn;


@interface GameState : NSObject <NSCoding>
{
TTPlayerTurn playersTurn;
NSMutableArray* boardState;

}

@property TTPlayerTurn playersTurn;
@property (strong, nonatomic) NSMutableArray* boardState;


@end

GameState.m

//
// GameState.m
// TicTac
//
// Created by Alessi Patrick on 8/26/11.
// Copyright (c) 2011 __MyCompanyName__. All rights reserved.
//

#import "GameState.h"

@implementation GameState
@synthesize playersTurn,boardState;


-(id) init
{
self = [super init];

if (self) {
// Alloc and init the board state
boardState = [[NSMutableArray alloc] initWithCapacity:9];

playersTurn=TTxPlayerTurn;

}

return self;

}


#pragma mark NSCoding methods
- (void)encodeWithCoder:(NSCoder *)aCoder
{

[aCoder encodeObject: boardState forKey:@"BoardState"];
[aCoder encodeInt:playersTurn forKey:@"PlayersTurn"];
}

- (id)initWithCoder:(NSCoder *)aDecoder
{
boardState = [aDecoder decodeObjectForKey:@"BoardState"];
playersTurn = [aDecoder decodeIntForKey:@"PlayersTurn"];

return self;

}

@end