How to iterate over an dictionary without knowing the keys, while getting key and object?

Question

I have an NSDictionary and want to iterate over the objects. But at the same time, I need to know the key of the dictionary.

I remember there was a special, fancy form of fast enumeration, but have forgotten the exact syntax.

Anyone?

Answer 1

I think what you want is something like this:

for (id key in dictionary) {
    NSLog(@"key: %@, value: %@", key, [dictionary objectForKey:key]);
}

Taken from here.

Answer 2

This is also a good choice if you like blocks.

[dict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {

}]

Answer 3

for (id key in mydictionary) {
   id mything = [mydictionary objectForKey:key];
}

Answer 4

keyEnumerator returns an object that lets you iterate through each of the keys in the dictionary. From here

Answer 5

To my knowledge, at the time when you asked the question, there was only one way of traversing keys and values at the same time: CFDictionaryApplyFunction.

Using this Core Foundation function involves an ugly C function pointer for the body of the loop and a lot of not-less-ugly, yet toll-free-bridged casting.

@zekel has the modern way of iterating a dictionary. Vote him up!