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I'm learning iOS but have an issue extracting data from a multidimensional NSMutableArray, I've looked at various solutions but have not yet found one..

I have an NSMutableArray like

{
 "service_0" = {
    "name" = "name1";
    "description" = "description1";
};
 "service_2" = {
    "name" = "name2";
    "description" = "description2";
};
Etc...
}

I wish to extract data into a new NSMutableArray (or NSArray) to get the following output for use in text labels such as = [myArray objectAtIndex:indexPath.row] 

(
    name1,
    name2,
Etc...
)

What would be the best solution? Thanks

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1
  • This looks more like a dictionary of dictionaries.
    – zaph
    Commented Sep 23, 2012 at 21:18

1 Answer 1

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1

Assuming that is an array of dictionaries, unlike in the question...

NSArray *newArray = [oldArray valueForKeypath:@"name"];

You can make it mutable using mutableCopy, if you wish.

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3
  • Your title and text refer to an array of dictionaries :-)
    – Paul Lynch
    Commented Sep 23, 2012 at 21:09
  • Handling a dictionary of dictionaries is far more problematic, and needs a few more lines of code (as in your answer). [[dictionary allValues] valueForKeypath:@"name"] would work, however.
    – Paul Lynch
    Commented Sep 23, 2012 at 21:14
  • Thanks guys, for the quick responses! .. I changed the array to a dictionary as suggested and extracted the rows using .. [[[myArray allValues] valueForKeyPath:@"name"] objectAtIndex:indexPath.row];
    – Peej
    Commented Sep 23, 2012 at 23:45

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