xcode未知类型名称

Question

我有这样的代码:

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

当我声明*firstPlayer时,Xcode不会编译我的项目并在Match.h中显示错误未知类型'Player'.

我试过清理项目,重建它但没有任何结果......

Answer 1

解决此循环的常规方法是转发声明类:

在Match.h中:

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

并且#import "Player.h只在Match.h not中的Match.m中执行

其他两个.h文件也是如此.