Split a long string into an array with a given max number of characters

gistfile1.txt

+(NSArray *)splitString:(NSString *)str maxCharacters:(NSInteger)maxLength
{
    NSMutableArray *tempArray = [NSMutableArray arrayWithCapacity:1];
    NSArray *wordArray = [str componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

    NSInteger numberOfWords = [wordArray count];
    NSInteger index = 0;
    NSInteger lengthOfNextWord = 0;
    
  while (index < numberOfWords) {
		NSMutableString *line = [NSMutableString stringWithCapacity:1];

		while ((([line length] + lengthOfNextWord + 1) <= maxLength) && (index < numberOfWords)) {
	          lengthOfNextWord = [[wordArray objectAtIndex:index] length];
	          [line appendString:[wordArray objectAtIndex:index]];
	          index++;

            if (index < numberOfWords) {
                [line appendString:@" "];
            }
	    }
		[tempArray addObject:line];
	}
  return tempArray;
}