Having trouble with this alloc/releasing issue

I've tried numerous different attempts at it but always ends in leaks or errors. So here is my code开发者_运维知识库, with the allocating and releasing bits taken out. I'd like to know how people suggest i should go about doing this?

.h

#import "MatchingColors.h"

@interface MagicSchemeView : UIViewController {

    NSMutableArray *colors;

}

.m

colors = [MatchingColors monochromaticWithH:h S:s B:b WithComplementary:NO];

Then in MatchingColors.m:

+(NSMutableArray *)monochromaticWithH:(float)h S:(float)s B:(float)b WithComplementary:(BOOL)complementary {

    return result;

}

Like i say, my attempts at allocating and releasing here seem to be going wrong. Ideas?

This should work

A place for the [colors release]; would be after you're done with it. Which would be as soon as you know you don't need it, or would be done on dealloc. Make sure dealloc is a last resort to put this release.

.m:

colors = [[MatchingColors monochromaticWithH:h S:s B:b WithComplementary:NO] retain];


+(NSMutableArray *)monochromaticWithH:(float)h S:(float)s B:(float)b WithComplementary:(BOOL)complementary 
{      
    NSMutableArray *result = [[[NSMutableArray alloc] init] autorelease];

    // Create the result here

    return result;
}