XSynthesizeCoders.h

-(void) encodeWithCoder: (NSCoder*) coder
{
#define X(type, ivar) [coder encode##type:ivar forKey:@#ivar];
    XEncodeIvars
#undef X
}

-(id) initWithCoder: (NSCoder*) decoder
{
#define X(type, ivar) ivar = [decoder decode##type##ForKey:@#ivar];
    XEncodeIvars
#undef X
    return self;
}

ZFoo.h

@interface Foo : NSObject <NSCoder>

@property BOOL aBool;
@property BOOL anotherBool;
@property NSInteger anInteger;
@property NSInteger anotherInteger;
@property NSObject *anObject;
@property NSObject *anotherObject;

@end

ZFoo.m

@implementation Foo

#define XEncodeIvars \
X(Bool, _aBool) \
X(Bool, _anotherBool) \
X(Integer, _anInteger) \
X(Integer, _anotherInteger) \
X(Object, _anObject) \
X(Object, _anotherObject)

#include "XSynthesizeCoders.h"

@end