IOS: catch an information in a NSDictionary

I have an开发者_Go百科 NSArray and in the first position in this array there is a NSDictionary. In this dictionary there is two values: first value have a key "name" and second value have a key "number". If I know value of "name" can I get value of "number"?

So, you're looking to find the key in a dictionary when you only know the value.

For example, you have a dictionary where "a" => "4" and "b" => "3", the following code:

NSArray* matchingKeys = [dictionary allKeysForObject:@"3"];

Would return an array with "b" as the only element.

I solved in this way:

for (int j = 0; j<array.count; j++)
                {
                    NSArray *listaDictionary = [array objectAtIndex:j];

                    for(int x=0;x<listaDictionary.count;x++)
                    {
                        if([[[listaDictionary objectAtIndex:x] objectForKey:@"number"]intValue] == myNumber)