Saving Dictionary with NSAttributed String into a PList or into NSUserDefaults

Question

I've a Dictionary with an NSAttributtedString

{
    9 =     {
        9x0 =         {
            UserID = 123;
            formattedMessage = "Hi... How are you ?{\n    CTForegroundColor = \"<CGColor 0x601e460> [<CGColorSpace 0x6010020> (kCGColorSpaceDeviceGray)] ( 0 1 )\";\n    NSFont = \"CTFont <name: Cochin-BoldItalic, size: 17.000000, matrix: 0x0>\\nCTFontDescriptor <attributes: <CFBasicHash 0x6070640 [0x11f8400]>{type = mutable dict, count = 1,\\nentries =>\\n\\t1 : <CFString 0xf4d5c4 [0x11f8400]>{contents = \\\"NSFontNameAttribute\\\"} = <CFString 0x60707f0 [0x11f8400]>{contents = \\\"Cochin-BoldItalic\\\"}\\n}\\n>\";\n}";
            isDeleted = 0;
            isEdited = 0;
            lastModifiedDate = "2011-10-19 17:27:38 +0000";
            message = "Hi... How are you ?";
        };
    };
}

I tried Saving this Dictionary as a Plist in the Documents folder and also, save the dictionary in NSUserDefaults. Neither of it worked. Both methods work if the attributed string in the dictionary is removed.

Code used to save to Plist in Documents folder :

NSString *aDocumentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *aFilePath = [NSString stringWithFormat:@"%@/ChatHistory.plist",aDocumentsDirectory];
BOOL aStatus = [aDictionary writeToFile:aFilePath atomically:YES];

Code used to save Dictionary in NSUserDefaults :

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:aDictionary forKey:@"ChatHistory"];

Someone please help. Am I missing something ?

Answer 1

An interesting Implementation. Guess this is a solution :

https://devforums.apple.com/message/340283#340283

will explore this now..