Code for using custom types with the NSUserDefaults class.

Modified from the NSColor sample code on Apple’s developer web site

Source for NSUserDefaults+CocoaDevUsersAdditions.h :

#import <Foundation/Foundation.h>

@interface NSUserDefaults(CocoaDevUsersAdditions)

• (void)encodeObject:(id )anObject forKey:(NSString*)aKey;
• (id)decodeObjectForKey:(NSString*)aKey; @end

Source for NSUserDefaults+CocoaDevUsersAdditions.m :

#import “NSUserDefaults+CocoaDevUsersAdditions.h”

@implementation NSUserDefaults(CocoaDevUsersAdditions)

• (void)encodeObject:(id )anObject forKey:(NSString*)aKey { // Requires 10.2 or later for keyed archiving NSData* theData = [NSKeyedArchiver archivedDataWithRootObject:anObject]; [self setObject:theData forKey:aKey]; }

• (id)decodeObjectForKey:(NSString)aKey { // Requires 10.2 or later for keyed archiving NSData theData = [self dataForKey:aKey]; return (theData != nil) ? [NSKeyedUnarchiver unarchiveObjectWithData:theData] : nil; } @end

Category:CocoaDevUsersAdditions