43

I got code like this:

Match.h:

#import <Foundation/Foundation.h>
#import "player.h"

@interface Match : NSObject
{
    Player *firstPlayer;
}

@property (nonatomic, retain) Player *firstPlayer;

@end

Player.h:

#import <Foundation/Foundation.h>
#import "game.h"
@interface Player : NSObject
{
}

- (Player *) init;

//- (NSInteger)numberOfPoints;
//- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil;


@property (nonatomic, retain) NSString *name;
@property (nonatomic, retain) NSString *surname;
@property (nonatomic, assign) NSInteger *player_id;
@property (nonatomic, retain) NSString *notes;

@end

Game.h:

#import <Foundation/Foundation.h>
#import "match.h"
#import "player.h"

@interface Game : NSObject
{
    NSMutableArray *matches;
    NSMutableArray *players;
    NSString *name;
}

-(Game *) init;

@property (nonatomic, retain) NSMutableArray *matches;
@property (nonatomic, retain) NSMutableArray *players;
@property (nonatomic, retain) NSString *name;

@end

Xcode won't compile my project and show me error unknown type 'Player' in Match.h when I declare *firstPlayer.

I tried cleaning project, rebuilding it but without any result...

Esse
  • 3,278
  • 2
  • 21
  • 25
  • 11
    You have a cycle in your imports: Match.h imports Player.h imports Game.h imports Match.h. See [this question](http://stackoverflow.com/q/7896440/557219). –  Oct 26 '11 at 00:07
  • possible duplicate of [Objective-C header file not recognizing custom object as a type](http://stackoverflow.com/q/7896440/557219) – jscs Oct 26 '11 at 01:56

1 Answers1

125

The normal way to solve this cycles is to forward declare classes:

In Match.h:

@class Player;
@interface Match ...
    Player * firstPlayer;

and do #import "Player.h only in Match.m, not in Match.h

Same for the other two .h files.

justin
  • 104,054
  • 14
  • 179
  • 226
ott--
  • 5,642
  • 4
  • 24
  • 27