“预期说明者限定词列表”发生了什么错误 [英] What's going on with "expected specifier-qualifier-list" error

问题描述

这是我的GameEngine.h：

It is my GameEngine.h:

#import <Foundation/Foundation.h>
#import "GameArray.h";


@interface GameEngine : NSObject {
    GameArray *gameButtonsArray;
}

@property (nonatomic, retain) GameArray *gameButtonsArray;

这是我的GameArray.h：

And this is my GameArray.h:

#import <Foundation/Foundation.h>
#import "MyAppDelegate.h";

@interface GameArray : NSObject {
    NSMutableArray *gameButtonsArray;

}
@property (nonatomic, retain) NSMutableArray *gameButtonsArray;

它保持提示我的expected specifier-qualifier-list错误我的GameEngine.h和错误表示在GameArray之前的预期说明符限定符列表，发生了什么？

It keep prompt my "expected specifier-qualifier-list" error i my GameEngine.h, and error said that "expected specifier-qualifier-list before 'GameArray'", what's going on?

推荐答案

这是最佳做法。

GameEngine.h

GameEngine.h

#import <Foundation/Foundation.h>

@class GameArray;

@interface GameEngine : NSObject {
    GameArray *gameButtonsArray;
}

@property (nonatomic, retain) GameArray *gameButtonsArray;

然后在GameEngine.m

Then in GameEngine.m

#import "GameEngine.h"
#import "GameArray.h"

@implementation GameEngine    
//...
@end

这将阻止循环引用，其中一个标题导入导入第一个的第二个标题，该第二个标题导入第二个等等在无休止的循环。

This prevents circular references wherein one header imports a second header which imports the first which imports the second and so on in an endless cycle.

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