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Imme22009
Imme22009

Reputation: 4129

NSDictionary flatten hierarchy

I've got an NSDictionary object like this:

dictionary: {
    data =     {
        "access_token" = "xxx";
        "expires_in" = 00;
        "refresh_token" = "yyy";
        "token_type" = bearer;
    };
}

How can I flatten it so that I remove the 'data' object? Is there a quick way to do that? So the output should look like this:

dictionary: {

        "access_token" = "xxx";
        "expires_in" = 00;
        "refresh_token" = "yyy";
        "token_type" = bearer;
};

Upvotes: 0

Views: 625

Answers (4)

Benkax
Benkax

Reputation: 959

using recursive function, the only problem with this method is it will replace the old data if key happened to be the same in the nested dictionary

- (NSDictionary *)flattedDictionary{
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
  for (NSString *key in self.allKeys) {
    id object = [self objectForKey:key];
    if (![object isKindOfClass:[NSDictionary class]] && !isNull(object)) {
        [dict setObject:object
                 forKey:key];
    } else if ([object isKindOfClass:[NSDictionary class]]){
        [dict addEntriesFromDictionary:[object flattedDictionary]];
    }
}
  return [NSDictionary dictionaryWithDictionary:dict];
}

Upvotes: 0

kgu87
kgu87

Reputation: 2057

It doesn't look like "data" is an NSDictionary. Try 

id what = [dict objectForKey : @"data"];
NSLog(@"%@", [what class]);

What does it say?

Upvotes: 0

Inder Kumar Rathore
Inder Kumar Rathore

Reputation: 39988

NSDictionary *dataDict = [mainDict  objectForKey:@"data"];

Upvotes: 1

Daij-Djan
Daij-Djan

Reputation: 50109

flat dict in your example:

//grab data
NSDictionary *data = [yourDict objectForKey:@"data"];
assert(data != nil);
NSDictionary *flatDict = data; //OR data.copy // OR [NSDictionary dictionaryWithDictionary:data];

Upvotes: 0

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