I can't save NSUserdefaults from custom class - iphone

Question

I have a problem with saving from a custom class. I tried to save errors from some place in my code in NSUserDefaults but it doesn't work.
H file:
#import <Foundation/Foundation.h>
#interface Errors : NSObject<NSCoding>
#property (nonatomic,strong) NSString* type;
#property (nonatomic,strong) NSString* verNum;
#property (nonatomic,strong) NSString* title;
#property (nonatomic,strong) NSString* content;
#property (nonatomic,strong) NSString* source;
#property (nonatomic,strong) NSString* userId;
#property (nonatomic,strong) NSNumber* videoId;
#end
M file:
#import "Errors.h"
#implementation Errors
#synthesize verNum;
#synthesize type;
#synthesize title;
#synthesize content;
#synthesize source;
#synthesize userId;
#synthesize videoId;
- (void)encodeWithCoder:(NSCoder *)encoder{
[encoder encodeObject:self.verNum forKey:#"verNum"];
[encoder encodeObject:self.type forKey:#"type"];
[encoder encodeObject:self.title forKey:#"title"];
[encoder encodeObject:self.content forKey:#"content"];
[encoder encodeObject:self.source forKey:#"source"];
[encoder encodeObject:self.userId forKey:#"userId"];
[encoder encodeObject:self.videoId forKey:#"videoId"];
}
- (id)initWithCoder:(NSCoder *)decoder{
self = [super init];
if( self != nil ) {
self.verNum = [decoder decodeObjectForKey:#"verNum"];
self.type = [decoder decodeObjectForKey:#"type"];
self.title = [decoder decodeObjectForKey:#"title"];
self.content = [decoder decodeObjectForKey:#"content"];
self.source = [decoder decodeObjectForKey:#"source"];
self.userId = [decoder decodeObjectForKey:#"userId"];
self.videoId = [decoder decodeObjectForKey:#"videoId"];
}
return self;
}
#end
Saving:
errorsDitalis = [[Errors alloc]init];
errorsDitalis.verNum = (NSString *) [[request userInfo] objectForKey:#"verNum"];
errorsDitalis.type =(NSString *) [[request userInfo] objectForKey:#"type"];
errorsDitalis.title =(NSString *) [[request userInfo] objectForKey:#"title"];
errorsDitalis.content =(NSString *) [[request userInfo] objectForKey:#"content"];
errorsDitalis.source =(NSString *) [[request userInfo] objectForKey:#"source"];
errorsDitalis.userId =(NSString *) [[request userInfo] objectForKey:#"userId"];
errorsDitalis.videoId =(NSNumber *) [[request userInfo] objectForKey:#"videoId"];
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setObject:errorsDitalis forKey:#"ErrorList"];
[userDefaults synchronize];
Loading:
Errors * newError = [[Errors alloc]init];
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
newError = [userDefaults objectForKey:#"ErrorList"];
It just returns nil for newErrors. I tried to use this help but it didn't work. Does someone have an idea?

Answer 1

Try
[self setVerNum:[decoder decodeObjectForKey:#"verNum"]];
instead of
self.verNum = [decoder decodeObjectForKey:#"verNum"];
I believe you should use the setters when you call initWithCoder

Answer 2

i think i should do :
[[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver archivedDataWithRootObject:self.errorsDitalis] forKey:#"ErrorList"];
[[NSUserDefaults standardUserDefaults] synchronize];
and not:
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setObject:errorsDitalis forKey:#"ErrorList"];
[userDefaults synchronize];
and load with:
newError = (Errors *)[NSKeyedUnarchiver unarchiveObjectWithData:[[NSUserDefaults standardUserDefaults] objectForKey:#"ErrorList"]];