Sign that I'm Going Nuts. I'm putting corrupted lyrics to Tower of Power songs into my source code. With diacriticals.

NSArray+Chunkify.m

//
//  NSArray+Chunky.h
//
//  Created by Christopher Miller on 8/19/11.
//  Copyright 2011 FSDEV. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSArray (Chunky)

/**
 * YOU GOT 'TA CHUNKIFY!!! JUST LIKE A BOW-LEGGÈD MONKEY!!! YOU GOT 'TA CHUNKIFY!!! NSAAAAAAARRRRAAAAYAH!
 *
 * Takes sth like this:
 *
 *     ( 1, 2, 3, 4, 5, 6, 7, 8, 9 )
 *
 * and then a call like this:
 *
 *     [myArray chunkifyWithMaxSize:3];
 *
 * will return sth like this:
 *
 *     ( ( 1, 2, 3 ), ( 4, 5, 6 ), ( 7, 8, 9 ))
 */
- (NSArray *)chunkifyWithMaxSize:(NSUInteger)size;

@end

//
//  NSArray+Chunky.m
//
//  Created by Christopher Miller on 8/19/11.
//  Copyright 2011 FSDEV. All rights reserved.
//

#import "NSArray+Chunky.h"

@implementation NSArray (Chunky)

- (NSArray *)chunkifyWithMaxSize:(NSUInteger)size
{
    NSAutoreleasePool * pool0 = [[NSAutoreleasePool alloc] init];
    NSMutableArray * chunks = [[NSMutableArray alloc] init];
    NSMutableArray * chunk = [NSMutableArray array];
    for (id object in self) {
        if ([chunk count] == size) {
            [chunks addObject:chunk];
            chunk = [NSMutableArray array];
        }
        [chunk addObject:object];
    }
    if ([chunk count] > 0)
        [chunks addObject:chunk];
    [pool0 release];
    return [NSArray arrayWithArray:[chunks autorelease]];
}

@end

I'd go with something like this:

    - (NSArray *)subarrayForChunk:(NSUInteger)chunk length:(NSUInteger)length {
        NSRange chunkRange = NSMakeRange(chunk * length, length);
        NSRange allObjectsRange = NSMakeRange(0, self.count);

        NSRange intersectionRange = NSIntersectionRange(chunkRange, allObjectsRange);

        if (intersectionRange.length > 0) {
            return [self subarrayWithRange:intersectionRange];
        } else {
            return nil;
        }
    }

    - (NSArray *)chunkifyWithMaxSize:(NSUInteger)size {
        NSUInteger chunk = 0;
        NSMutableArray *chunks = @[].mutableCopy;
        while (1) {
            NSArray *chunkArray = [self subarrayForChunk:chunk++ length:size];
            if (chunkArray.count == 0) break;

            [chunks addObject:chunkArray];
        }
        return chunks;
    }