How to sort an NSArray using different sort functions

Question

I have a NSArray of NSDictionaries, in which I create an NSArray of NSStrings from one of the elements in the NSDictionary.

I am then trying to sort both, but I am getting slightly different results from both sorts.

the NSDictionary is simple

NAME
Number

I am the first NSArray and creating a new NSArray using the NAME element of the dictionary.

I am then sorting the first array like this

NSSortDescriptor * descriptor = [[NSSortDescriptor alloc] initWithKey:@"NAME" ascending:YES]; // 1
sortedByNameArray = [dataArrayOfDictionaries sortedArrayUsingDescriptors:[NSArray arrayWithObject:descriptor]];

I then take the second array, which is exactly the same order before the first is sorted and sort it like this

// sorts nicknames
newSortedArray = [nameOnlyArray sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];

And although both arrays are sorted alphabetically localizedCaseInsensitiveCompare: seems to do a good job of sorting where as my other sortedArrayUsingDescriptors: only seems to sort using the first letter so its not truly sorted.

I would like some help applying localizedCaseInsensitiveCompare to the NSArray of Dictionaries.. but I am not sure how to do this considering you have to access the NAME element of each NSDictionary inside the first NSArray.

Any help would be greatly appreciated.

Martin R · Accepted Answer · 2013-05-01 04:10:31Z

2

To compare with localizedCaseInsensitiveCompare in the first case, use

NSSortDescriptor * descriptor = [[NSSortDescriptor alloc] initWithKey:@"NAME" 
    ascending:YES 
    selector:@selector(localizedCaseInsensitiveCompare:)];

answered May 1, 2013 at 4:10

Martin R

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