Get all keys of an NSDictionary as an NSArray

87
votes

Is it possible to get all the keys from a specific NSDictionary as a seperate NSArray?

3
objective-cnsarraynsdictionary

3 Answers

186
votes

Just use 

NSArray*keys=[dict allKeys];

In general, if you wonder if a specific class has a specific method, look up Apple's own documentation. In this case, see NSDictionary class reference. Go through all the methods. You'll discover many useful methods that way.

16
votes

Yes it's possible. Use allKeys method: 

NSDictionary *yourDictionary;
NSArray * yourKeys
yourKeys = [yourDictionary allKeys];
3
votes

And if you want to get all keys and values, here's what you do:

for (NSString *key in dictionary) {
    id value = dictionary[key];
    NSLog(@"Value: %@ for key: %@", value, key);
}