NSDictionary Примеры работы со словарем

Array

 NSArray *wordsCountriesEU = [[NSMutableArray alloc] initWithObjects:@"Spanish",@"Germany",@"Italy",nil];
 NSArray *wordsCountriesAS = [[NSMutableArray alloc] initWithObjects:@"Iran",@"Oman",@"Livan",nil];
 NSMutableDictionary *words = [[NSMutableDictionary dictionaryWithObjectsAndKeys: wordsCountriesEU, @"Europ", wordsCountriesAS, @"Asian", nil], retain];
 [wordsCountriesEU release];
 [wordsCountriesAS release];
 
 NSArray *wordsInSection = [words objectForKey:@"Asian"];
 int nCount = wordsInSection.count;
 
 [words release];

vocabwords.txt - Файл в формате словаря из массивов строк

URL

 NSURL *wordsUrl = [NSURL URLWithString:@"http://cs193p.stanford.edu/vocabwords.txt"];
 NSMutableDictionary words = [[NSMutableDictionary dictionaryWithContentsOfURL:wordsUrl], retain];
 
 NSArray *wordsInSection = [words objectForKey:@"Asian"];
 int nCount = wordsInSection.count;
 
 [words release];