An (untested) macro and category for easily creating new index sets from unchanging content.

gistfile1.m

@interface NSIndexSet (ULIIndexSetCreation)

+(NSIndexSet*) indexSetWithIndexes: (const NSInteger [])indexes count: (NSUInteger)count;

@end


@implementation NSIndexSet (ULIIndexSetCreation)

+(NSIndexSet*) indexSetWithIndexes: (const NSInteger [])indexes count: (NSUInteger)count
{
    if( count < 1 )
        return [NSIndexSet indexSet];
    
    NSMutableIndexSet   *   muIdxSet = [[[NSMutableIndexSet alloc] initWithIndex: indexes[0]] autorelease];
    
    for( int x = 1; x < count; x++ )
        [muIdxSet addIndex: indexes[x]];
    
    return muIdxSet;
}

@end


#define INDEX_SET(destVar, ...) do { NSInteger idxes[] = { __VA_ARGS__ }; (destVar) = [NSIndexSet indexSetWithIndexes: idxes count: sizeof(idxes) /sizeof(NSInteger)]; } while(0)