objective C sort 2D array on multiple columns?

Question

I have an array of data like so.

{
"first_name"="John",
"last_name"="Lock"
};
{
"first_name"="John",
"last_name"="Lee"
};
{
"first_name"="Melinda",
"last_name"="Abman"
};

I was able to sort by first name like so:

NSArray *sortedArray = [tablearray sortedArrayUsingDescriptors:[NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"first_name" ascending:YES]]];

But is there a simple way to sort by firstname then lastname? Basically do the equivalent of SELECT * FROM users ORDER BY first_name ASC, last_name ASC ?

Manually you can sort, rebuild your Model(array), and show it in View(NSTableView). Same thing I did. Also, Thanks for posting this question if any better solution we can get :) — Anoop Vaidya
– Anoop Vaidya, Commented Nov 15, 2012 at 13:30

Paul.s · Accepted Answer · 2012-11-15 13:34:40Z

2

sortedArrayUsingDescriptors: takes an array of NSSortDescriptor's so you can simply keep adding sortDescripters.

NSArray *sortDescriptors = @[
  [NSSortDescriptor sortDescriptorWithKey:@"first_name" ascending:YES],
  [NSSortDescriptor sortDescriptorWithKey:@"last_name" ascending:YES]
];

NSLog(@"%@", [array sortedArrayUsingDescriptors:sortDescriptors]);

answered Nov 15, 2012 at 13:34

Paul.s

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