gistfile1.m

--- Color4.h ---

@interface Color4 : NSObject {
}

-(id) initWithRed:(float)red green:(float)green blue:(float)blue alpha:(float)alpha;

@end

--- Color4.m ---

#import "Color4.h"

@implementation Color4

-(id) initWithRed:(float)red green:(float)green blue:(float)blue alpha:(float)alpha {
	self = [super init];
	
	return self;
}

@end

--- Light.h ----

#import <Foundation/Foundation.h>

@class Color4;

@interface Light : NSObject {
	Color4* color;
}

@property (nonatomic, retain) Color4* color;

-(id) init;

@end

--- Light.m ---
#import "Light.h"
#import "Color4.h"

@implementation Light

@synthesize color;

-(void) dealloc {
	[ color release ];
	
	[ super dealloc ];
}

-(id) init {
	if( self = [ super init ] ) {
		color = (Color4 *) [ [ Color4 alloc ] initWithRed:1.0f green:1.0f blue:1.0f alpha:1.0f ];
	}
	
	return self;
}

@end

------

warning: incompatible Objective-C types assigning 'UIColor*', expected 'Color4*'