Saving NSDictionary (with custom classes) to NSUserDefaults [duplicate] - ios

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This question already has answers here:
How to store custom objects in NSUserDefaults
(7 answers)
Closed 9 years ago.
I am trying to save an NSDictionary to my NSUserDefualts.
The dictionary consists of 3 different custom classes.
#interface PastOrder : NSObject <NSCoding>
{
NSDate *timeIn;
NSDate *timeOut;
NSString *status;
NSMutableArray *myItems;
}
#property (nonatomic, retain) NSDate *timeIn;
#property (nonatomic, retain) NSDate *timeOut;
#property (nonatomic, retain) NSString *status;
#property (nonatomic, retain) NSMutableArray *myItems;
#end
#implementation PastOrder
#synthesize timeIn, timeOut, status, myItems;
#define PastOrderTimeInKey #"PastOrderTimeInKey"
#define PastOrderTimeOutKey #"PastOrderTimeOutKey"
#define PastOrderStatusKey #"PastOrderStatusKey"
#define PastOrderMyItemsKey #"PastOrderMyItemsKey"
-(id)initWithCoder:(NSCoder*)decoder
{
self = [super init];
if(self)
{
self.timeIn = [decoder decodeObjectForKey:PastOrderTimeInKey];
self.timeOut = [decoder decodeObjectForKey:PastOrderTimeOutKey];
self.status = [decoder decodeObjectForKey:PastOrderStatusKey];
self.myItems = [decoder decodeObjectForKey:PastOrderMyItemsKey];
}
return self;
}
-(void)encodeWithCoder:(NSCoder*)encoder
{
[encoder encodeObject:self.timeIn forKey:PastOrderTimeInKey];
[encoder encodeObject:self.timeOut forKey:PastOrderTimeOutKey];
[encoder encodeObject:self.status forKey:PastOrderStatusKey];
[encoder encodeObject:self.myItems forKey:PastOrderMyItemsKey];
}
-(void)dealloc
{
self.timeIn = nil;
self.timeOut = nil;
self.status = nil;
self.myItems = nil;
}
#end
#interface PastOrderItem : NSObject <NSCoding>
{
NSNumber *itemID;
NSString *status;
NSMutableArray *itemChoices;
}
#property (nonatomic, retain) NSNumber *itemID;
#property (nonatomic, retain) NSString *status;
#property (nonatomic, retain) NSMutableArray *itemChoices;
#end
#implementation PastOrderItem
#synthesize itemID,status,itemChoices;
#define PastOrderItemItemIDKey #"PastOrderItemItemIDKey"
#define PastOrderItemStatusKey #"PastOrderItemStatusKey"
#define PastOrderItemItemChoicesKey #"PastOrderItemItemChoicesKey"
-(id)initWithCoder:(NSCoder*)decoder
{
self = [super init];
if(self)
{
self.itemID = [decoder decodeObjectForKey:PastOrderItemItemIDKey];
self.itemChoices = [decoder decodeObjectForKey:PastOrderItemItemChoicesKey];
self.status = [decoder decodeObjectForKey:PastOrderItemStatusKey];
}
return self;
}
-(void)encodeWithCoder:(NSCoder*)encoder
{
[encoder encodeObject:self.itemID forKey:PastOrderItemItemIDKey];
[encoder encodeObject:self.itemChoices forKey:PastOrderItemItemChoicesKey];
[encoder encodeObject:self.status forKey:PastOrderItemStatusKey];
}
-(void)dealloc
{
self.itemID = nil;
self.itemChoices = nil;
self.status = nil;
}
#end
#interface PastOrderItemChoice : NSObject <NSCoding>
{
NSNumber *modifierID;
NSNumber *modifierChoice;
}
#property (nonatomic, retain) NSNumber *modifierID;
#property (nonatomic, retain) NSNumber *modifierChoice;
#end
#implementation PastOrderItemChoice
#synthesize modifierID, modifierChoice;
#define PastOrderItemChoiceModifierIDKey #"PastOrderItemChoiceModifierIDKey"
#define PastOrderItemChoiceModifierChoiceKey #"PastOrderItemChoiceModifierChoiceKey"
-(id)initWithCoder:(NSCoder*)decoder
{
self = [super init];
if(self)
{
self.modifierID = [decoder decodeObjectForKey:PastOrderItemChoiceModifierIDKey];
self.modifierChoice = [decoder decodeObjectForKey:PastOrderItemChoiceModifierChoiceKey];
}
return self;
}
-(void)encodeWithCoder:(NSCoder*)encoder
{
[encoder encodeObject:self.modifierID forKey:PastOrderItemChoiceModifierIDKey];
[encoder encodeObject:self.modifierChoice forKey:PastOrderItemChoiceModifierChoiceKey];
}
-(void)dealloc
{
self.modifierID = nil;
self.modifierChoice = nil;
}
#end
Those are the three classes that will be inside this NSDictionary.
Here is how I Load and Save it.
-(void)SavePrefs
{
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSData* data=[NSKeyedArchiver archivedDataWithRootObject:self.myDictionary];
[prefs setObject:data forKey:#"SavedOrders"];
[prefs synchronize];
}
- (id)init
{
self = [super init];
if (self)
{
NSData* data = [[NSUserDefaults standardUserDefaults] objectForKey:#"SavedOrders"];
self.myDictionary = [NSKeyedUnarchiver unarchiveObjectWithData:data];
}
return self;
}
I have experimented with the code a bit, and best I have to far, is that when I save the dictionary, it was 135 bytes, same as when I loaded it, but it still didnt fill the dictionary up. So I am at a loss.

Answer 1

Your code seems to be good. I can't find a mistake so try to change line:
self.myDictionary = [NSKeyedUnarchiver unarchiveObjectWithData:data];
to
id unknownObject = [NSKeyedUnarchiver unarchiveObjectWithData:data];
NSLog(#"%#",[unknownObject class]);
And look # the console. Maybe you should also try casting if the output will be dictionary. So try to change this to:
self.myDictionary = (NSDictionary*)[NSKeyedUnarchiver unarchiveObjectWithData:data];
EDIT
NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:#"object1",#"key1",#"object2",#"key2",#"object3",#"key3", nil];
NSLog(#"before: %#",dictionary);
NSData *myData = [NSKeyedArchiver archivedDataWithRootObject:dictionary];
NSDictionary *myDictionary = (NSDictionary*) [NSKeyedUnarchiver unarchiveObjectWithData:myData];
NSLog(#"after: %#",myDictionary);
Output:
2013-11-13 14:32:31.369 DemoM[175:60b] before: {
key1 = object1;
key2 = object2;
key3 = object3;
}
2013-11-13 14:32:31.372 DemoM[175:60b] after: {
key1 = object1;
key2 = object2;
key3 = object3;
}