CODEWITHSUNDEEP
iphoneobjective-cnsmutabledictionary
Alaattin Bedir
Alaattin Bedir

Reputation: 193

how can I sort NSMutableDictionary with keys value?

I have a NSMutableDictionary with string keys and every key has its own array. I want to re-sort the dictionary with keys value alphabetically. How can I do this?

Upvotes: 11

Views: 16822

Answers (3)

Vitalii Gozhenko
Vitalii Gozhenko

Reputation: 9354

NSDictionary *yourDictionary;
NSArray *sortedKeys = [yourDictionary.allKeys sortedArrayUsingDescriptors:@[[NSSortDescriptor sortDescriptorWithKey:@"self" ascending:YES]]];
NSArray *sortedValues = [yourDictionary objectsForKeys:sortedKeys notFoundMarker:@""];

Upvotes: 3

Rahul Juyal
Rahul Juyal

Reputation: 2144

Use this one 

NSArray *myKeys = [Dict allKeys];
NSArray *sortedKeys = [myKeys sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
NSMutableArray *sortedValues = [[[NSMutableArray alloc] init] autorelease];

for(id key in sortedKeys) {
    id object = [Dict objectForKey:key];
    [sortedValues addObject:object];
}

Upvotes: 8

tobiasbayer
tobiasbayer

Reputation: 10369

A dictionary is unsorted by definition.

For iterating over the keys in a specific order, you can sort an array containing the keys of the dictionary.

NSArray *keys = [theDictionary allKeys];
NSArray *sortedKeys = [keys sortedArrayUsingSelector:@selector(compareMethod:)];

There are several other sorted... methods, e.g. sorting with a NSComparator. Have a look here.

Upvotes: 19

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