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iphoneobjective-cnsmutableset

objective-c sort NSMutableSet of NSStrings?

Possible Duplicate:
What is the most efficient way to sort an NSSet?

I currently have an NSMutableSet with the following a list of strings. e.g.: {@"c",@"d",@"e",@"f",@"g",@"a"}

Can someone please tell me how I can sort these values alphabetically? Is there a way to do this using sortedArrayUsingDescriptors: ?

Solution

  • Sure, you can use that method:

    NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"description" ascending:YES];
NSArray *sortedArray = [mySet sortedArrayUsingDescriptors:[NSArray arrayWithObject:sort]];

    This just creates a new sort descriptor that specifies the key "description" (NSString provides a -description method that returns the string). It then passes an array containing that sort descriptor as a parameter to -sortedArrayUsingDescriptors:, which you can send to any NSSet.