Objective-C: Sort keys of NSDictionary based on dictionary entries

Question

OK so I know that dictionaries can\'t be sorted. But, say I have NSMutableArray *keys = [someDictionary allKeys]; Now, I want to sort those keys, based on the corre

Answer 1

NSDictionary *dict = // however you obtain the dictionary
NSMutableArray *sortedKeys = [NSMutableArray array];

NSArray *objs = [dict allValues];
NSArray *sortedObjs = [objs sortedArrayUsingSelector:@selector(compare:)];
for (NSString *s in sortedObjs)
    [sortedKeys addObjectsFromArray:[dict allKeysForObject:s]];

Now sortedKey will contain the keys sorted by their corresponding objects.