How to get the key values from NSDictionary in Objective C?

Question

I have a Dictionary:

{
  "FirstName" : "Katie",
  "SecondName" : "Brown"
}

How to get the key values "FirstName" and "SecondName" from the above dictionary

[Get all keys of an NSDictionary](http://stackoverflow.com/questions/7057063/get-all-keys-of-an-nsdictionary-as-an-nsarray) — Bista, Aug 31 '16 at 06:51
if ([dict objectForKey:@"Firstname"] != nil) { // key not null } — Mayank Patel, Aug 31 '16 at 06:51
can use NSArray *arrKey = [dict allKeys]; NSArray *arrVal = [dict allValues]; — Andolasoft Inc, Aug 31 '16 at 06:54
Possible duplicate of [Obj-C get JSON key name](http://stackoverflow.com/questions/29636072/obj-c-get-json-key-name) — murali kurapati, Apr 20 '17 at 09:34
Possible duplicate of [Get all keys of an NSDictionary as an NSArray](https://stackoverflow.com/questions/7057063/get-all-keys-of-an-nsdictionary-as-an-nsarray) — murali kurapati, Oct 08 '18 at 15:19

score 1 · Answer 1 · answered Aug 31 '16 at 06:51

you can get as

if ([yourDictname objectForKey:@"FirstName"] && [yourDictname objectForKey:@"SecondName"]) {
    // key exists.
}
else
{
    // ...
}

or you can get

if ([[yourDictname allKeys] containsObject:@"FirstName"] && [[yourDictname allKeys] containsObject:@"SecondName"]) {
    // key exists.
}

score 1 · Accepted Answer · edited Aug 31 '16 at 06:59

1

Try this code:

NSData* yourJSONData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:yourJSONData options:0 error:nil];
NSArray *allTheKeys = [jsonObject allKeys];

edited Aug 31 '16 at 06:59

Arun

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answered Aug 31 '16 at 06:52

Bhadresh Kathiriya

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score 1 · Answer 3 · answered Aug 31 '16 at 06:55

1

You can get array of keys from dictionary like,

   NSDictionary *dic; // your dictionary here

NSArray *allKeys = [dic allKeys];
NSLog(@"all keys : %@",allKeys);

You can got same for value also like [dic allValues]

answered Aug 31 '16 at 06:55

Ketan Parmar

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Rogojan Nicolae · Answer 4 · 2018-10-08T20:47:45.540

0

NSString *jsonString = @" {\"FirstName\" : \"Katie\",\"SecondName\" : \"Brown\"}";
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
for (NSString *key in dic.allKeys) {
    NSLog(@"key: %@ value: %@", key, dic[key]);
}

or try JSONModel.

edited Oct 08 '18 at 20:47

answered Oct 08 '18 at 20:27

Rogojan Nicolae

81
5

Please add explanation to your answer – Jan Černý Oct 08 '18 at 20:46

How to get the key values from NSDictionary in Objective C?

4 Answers4