Property List Serialization

Bookmarkserialization.m

// Bookmark.h

@interface Bookmark : NSObject <NSCoding>

@property (nonatomic, copy) NSString *label;
@property (nonatomic, copy) NSString *url;

@end

// Bookmark.m
#import "Bookmark.h"

@implementation Bookmark

@synthesize label = _label;
@synthesize url = _url;

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super init];
    if (self) {
        self.label = [aDecoder decodeObjectForKey:@"label"];
        self.url = [aDecoder decodeObjectForKey:@"url"];
    }
    
    return self;
}

- (void)encodeWithCoder:(NSCoder *)aCoder {
    [aCoder encodeObject:self.label forKey:@"label"];
    [aCoder encodeObject:self.url forKey:@"url"];
}

- (void)dealloc {
    [_label release];
    [_url release];
    [super dealloc];
}

@end

// archiving the object
[NSKeyedArchiver archiveRootObject:_bookmarks toFile:_path];

// restoring the object
_bookmarks = [[NSKeyedUnarchiver unarchiveObjectWithFile:_path] retain];

gistfile1.m

// writing to a file
NSArray *flavors = [NSArray arrayWithObjects:@"chocolate", @"vanilla", 
                              @"strawberry", nil];

[flavors writeToFile:PATH atomically:YES];



// reading from a file
NSArray *flavorsFromDisk = [NSArray arrayWithContentsOfFile:PATH];