如何使用目标C从Json响应中获取特定值？

Question

I am trying to get response of first key value without mentioning key name of "A" using objective C . I cant get exactly, please help me to get from below response.

NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves | NSJSONReadingMutableContainers error:&error];

NSDictionary *response = [JSON[@"response"]firstObject];


response = {
    A =     {
        company =         (
                        {
                no = "115";
                student = "Mich";
                school =                 (
                                        {
                        grade = A;

                    }
                );
                test = "<null>";
                office = tx;
            }
      );
   };
}

Answer 1

There are a few ways to do this, depending on your exact requirements. If you just need to access the value of each key in JSON[@"response"] , you can enumerate the JSON dictionary:

[JSON enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
    NSDictionary *dict = (NSDictionary *)obj;

    ...

    if (shouldStop) { // whatever condition you want, if any
        *stop = YES;
    }
}];

If you want some kind of ordering, you need to use [JSON allKeys] :

NSArray *keys = [[JSON allKeys] sortedArrayUsing...];  // Use whichever sort method you like
for (NSString *key in keys) {
    NSDictionary *dict = JSON[key];

    ...
}

If all you want are the values, you can use [JSON allValues] . Sort if desired.