NSDictionary, CustomKeys, Comparison - ios

Question

SOLVED
It seemed that both -referenceDictionary were not containing exact same information… Dang it ! Fixed it and now it works perfectly.
Initial question
It's been a few hours since I started struggling with this problem, here it is :
I have a CustomClassA which I use as NSDictionary key (obviously for the Object:ForKey: method).
At first it did not work at all, then I read this, that and a few other stuffs around the web…
So I tried overriding both -isEqual: and -hash by doing as said (maybe a little less :p) :
- (BOOL)isEqual:(id)anObject
{
if([anObject isKindOfClass:[self class]])
{
NSLog(#"HASH = %#", [anObject hash] == [self hash] ? #"YES" : #"NO");
NSLog(#"DICT = %#", [[self referenceDictionary] isEqualToDictionary:[anObject referenceDictionary]] ? #"YES" : #"NO");
return [[self referenceDictionary] isEqualToDictionary:[anObject referenceDictionary]];
}
return false;
}
- (NSUInteger)hash
{
NSUInteger prime = 31;
NSUInteger result = 1;
NSArray* values = [referenceDictionary allValues];
for(id k in values)
{
result = prime * result + [k hash];
}
return result;
}
Please, note that my NSDictionary will never contain nil values because I do take care of having these away.
Anyway, both of these methods do return YES on one of the NSDictionary entry when calling :[myDict objectForKey:myObject].
But still, it seems [myDict objectForKey:myObject] returns nil, even after "setting" it myself…
If anyone has time to help me solving my pb I'd be thankful !
Regards,
Cehm
EDIT:
Ok, for the purpose of being a bit more clear about this issue. Lets assume two classes : Artist and Single.
Then I want to create a NSDictionary which contains an Artist as the key and this Artist key points to a NSArray of "Single"s.
For instance I'd have the following dictionary :
#{
artistA : #[song1, song2, song3],
artistB : #[songZ],
artistC : #[songF]
}
But now the thing is I want to create this dictionary like this :
for(Single* aSong in ArrayOfSingle)
{
Artist* anArtist = [[Artist alloc] initWithArtistName:aSong.artistName];
if([data objectForKey: anArtist] == nil)
{
[data setObject:[[NSMutableArray alloc] init] forKey: anArtist];
} else
{
NSLog(#"exists");
}
[[data objectForKey: anArtist] addObject:aSong];
}
Taken into account that data is mutable (Simple NSMutableDictionary) and that I won't ever change anArtist (assuming ARC still keeps its instance…).
EDIT 2:
I overrode NSCopying :
- (id)copyWithZone:(NSZone *)zone {
return [[[self class] allocWithZone:zone] initWithDictionary:referenceDictionary];
}
As my CustomClass uses initWithDictionary: I assumed it would work just fine by doing this.
EDIT 3:
Here's the initWithDictionary:
-(id) initWithDictionary:(NSDictionary*) dictionary
{
self = [super initWithDictionary:dictionary];
if(self)
{
referenceDictionary = dictionary;
title = [super notNullObjectForKey:#"title"];
name = [super notNullObjectForKey:#"name"];
category = [super notNullObjectForKey:#"category"];
artist = [super notNullObjectForKey:#"artist"];
ad_city = [super notNullObjectForKey:#"ad_city"];
}
return self;
}