可能的循环引用问题_移动开发问题-跟版网

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问题描述

我不是白痴，但头文件有时让我觉得自己像个白痴.我有一个可能过于复杂的设置，它有一个我无法解决的错误.这是我能做到的尽可能简单的细节......

I am not an idiot, but header files make me feel like one sometimes. I have what is probably an overly-complicated set-up that has an error that I cannot resolve. Here it is in about as simple as detail as I can make it....

我有一个包含模型类的控制器类.
我有一个 Scene 类来捕捉动作并与控制器通信.
我有一个 Layer 类，它与 Model 类对话以输出 Model 的状态.
Scene 类包含仅用于输出的 Layer 类.
场景必须包含 Cocos2D 框架确定的层.
特定场景类派生自 RootScene 类，该类包含对 Controller 类的引用.
特定的 Layer 类派生自 RootLayer 类，该类包含对 Model 类的引用.
控制器负责创建场景，场景负责创建层.

当创建一个层并将控制器的模型传递给层的模型(在 AScene.m 中)时，问题就出现了.我收到在非结构或联合的情况下请求成员‘模型’".铸造不起作用，我不知道如何让这些类相互交谈.我认为部分问题可能是 Controller 类包含 Model 类.

The problem comes when making a Layer and passing the Controller's Model to the Layer's Model (in AScene.m). I get the "Request for member 'Model' in something not a stucture or union". Casting doesn't work, and I'm at a loss for how to allow these classes to talk with each other. I think part of the problem might be that Controller class contains the Model class.

Controller.h

#import <Foundation/Foundation.h>

@class Model;
@class AScene;

@interface Controller : NSObject {
    Model *Model;
}
@property (nonatomic, retain) Model *Model;
-(void)runScene;

Controller.m

#import "Controller.h"

#import "Model.h"
#import "AScene.h"

@implementation Controller

@synthesize Model;

- (void)runScene {
    AScene *newScene = [[AScene alloc] init];
    newScene.controller = self;
}

RootScene.h

#import "cocos2d.h"

@class Controller;

@interface RootScene : Scene {
    Controller *controller;
}
@property (nonatomic, retain) Controller *controller;

@end

RootScene.m

#import "RootScene.h"
#import "Controller.h"

@implementation RootScene

@synthesize controller;

- (id) init {
    self = [super init];
    if (self != nil) {
        //
    }
    return self;
}

- (void) dealloc {
    [controller release];
    [super dealloc];
}

@end

AScene.h

#import "RootScene.h"

@class ALayer;
@class Model;

@interface AScene : RootScene {
}

@end

AScene.m

#import "AScene.h"
#import "ALayer.h"
#import "Model.h"

@implementation AScene

- (id) init {
    self = [super init];
    if (self != nil) {
        ALayer *newLayer = [ALayer node];
        newLayer.model = controller.Model; // <-- Request for member 'Model' in something not a stucture or union
        [self addChild:statusScreenLayer];
    }
    return self;
}

- (void) dealloc {
    [super dealloc];
}

@end

RootLayer.h

#import "cocos2d.h"

@class Model;

@interface RootLayer : Layer {
    Model *model;
}
@property (nonatomic, retain) Model *model;

@end

RootLayer.m

#import "RootLayer.h"

#import "Model.h"

@implementation RootLayer

@synthesize model;

- (id) init {
    self = [super init];
    if (self != nil) {
        //
    }
    return self;
}

- (void) dealloc {
    [model release];
    [super dealloc];
}

@end

ALayer.h

#import "RootLayer.h"

@interface ALayer : RootLayer {
}
-(void) draw;

@end

ALayer.m

#import "ALayer.h"

@implementation ALayer

-(void) draw {
    // draw based on state of the model
}

@end

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