Avoiding multiple #import .h when using @Class forward declaration

gistfile1.m

//QPBattlefield.h

#import "ClonePilotBattlefield.h"
#import "QPBFState.h"
#import "QPBFTitleState.h"
#import "QPBFDrawingState.h"
#import "QPBFInputConstants.h"

@interface QPBattlefield : ClonePilotBattlefield

@property (nonatomic, retain) QPBFState *currentState;
@property (nonatomic, retain) QPBFTitleState *titleState;
@property (nonatomic, retain) QPBFDrawingState *drawingState;

- (void)changeState:(QPBFState *)state;

@end

//QPBFState.h


#import <Foundation/Foundation.h>
@class QPBattlefield;

@interface QPBFState : NSObject

@property (nonatomic, retain) QPBattlefield *f;

- (void)addTouch:(CGPoint)l;

- (id)initWithBattlefield:(QPBattlefield *)field;

@end

//QPBFTitleState.m ((inherits from QPBFState))


#import "QPBFTitleState.h"
#import "QPBattlefield.h"

@implementation QPBFTitleState

- (void)addTouch:(CGPoint)l {
    if (GetDistance(l, self.f.player.l) <= QPBF_PLAYER_TAP_RANGE) {
        [self.f changeState:self.f.drawingState];
    }
}

@end

Line 4 & 39. How can I avoid doing this in every subclass of QPBFState or, why doesn't @Class work as I want it to?

I could use a @protocol. I want to know if this is possible.

I want the compiler to know about QPBattlefield's properties from a @Class. Compiler flag somewhere.. ?

@class doesn't promise any interface. It just promises that it will exist at compile time. Why can't you just do this again?

#import "QPBattleField.h"

All @Class does is tell a class that "a class with this name does/will exist". There's no information about what the class contains until you import the header.

Suspicions confirmed. Thanks everyone.

Circular #imports would work if only ..

http://www.programmers-pain.de/wp-content/uploads/recursion.jpg

@subdigital Definitely can. Just seeing if I could avoid typing that one extra line N*subclasses times in this design.

You can put it in your PCH file maybe.

@subdigital I'm about to get a haircut. Inspired.

omgwtfbbq haircut?!