How can I sort an NSArray containing NSDictionaries?

Question

I have an NSArray which contains NSDictionary objects. Each of these NSDictionary objects contains an ORDER key.

How can I sort this NSArray based on this key within each of these NSDictionaries?

Answer 1

Here is an example. Imagines you have an array of dictionnaries. Ecah dictionnary have 2 keys "name" & "dateOfBirth". You can sort your array by "name" like this :

//
// Sort array by name
//
NSSortDescriptor *Sorter = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES];
[myArray sortUsingDescriptors:[NSArray arrayWithObject:Sorter]];
[Sorter release];

Note that myArray is a NSMutableArray.