Question

我第一次使用单身人士而且我真的不知道如何实施它... 好的，我需要解释一些事情：在 Hexagon.h （继承自CCNode）我想创建多个精灵（这里称为“六边形”）。但是，它们尚未添加到场景中。通过调用Hexagon *nHex = [[Hexagon alloc]init];将它们添加到 HelloWorldLayer.m 类中。那是对的吗？然后是迭代for循环并创建所有六边形还是只创建一个？
好吧无论如何，我有一个单例类，它必须处理所有公共游戏状态信息但是检索是不可能的。例如，我无法检索existingHexagons的值，因为它返回(null)个对象。我错误地设置了对象，或者我错误地从单例中检索数据。实际上，我甚至欣赏其中一个问题的答案。请帮我。如果问题不明确，请添加评论，我会尽力澄清。

我现在所拥有的是：

GameStateSingleton.h

#import <Foundation/Foundation.h>

@interface GameStateSingleton : NSObject{
    NSMutableDictionary *existingHexagons;

}
+(GameStateSingleton*)sharedMySingleton;
-(NSMutableDictionary*)getExistingHexagons;

@property (nonatomic,retain) NSMutableDictionary *existingHexagons; 


@end

GameStateSingleton.m

#import "GameStateSingleton.h"

@implementation GameStateSingleton

@synthesize existingHexagons;

static GameStateSingleton* _sharedMySingleton = nil;

+(GameStateSingleton*)sharedMySingleton
{
    @synchronized([GameStateSingleton class])
    {
        if (!_sharedMySingleton)
            [[self alloc] init];

        return _sharedMySingleton;
    }

    return nil;
}

+(id)alloc
{
    @synchronized([GameStateSingleton class])
    {
        NSAssert(_sharedMySingleton == nil, @"Attempted to allocate a second instance of a singleton.");
        _sharedMySingleton = [super alloc];
        return _sharedMySingleton;
    }

    return nil;
}

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

    }

    return self;
}



@end

Hexagon.m

-(CCSprite *)init{
    if( (self=[super init])) {

        NSString *mainPath = [[NSBundle mainBundle] bundlePath];
        NSString *levelConfigPlistLocation = [mainPath stringByAppendingPathComponent:@"levelconfig.plist"];
        NSDictionary *levelConfig = [[NSDictionary alloc] initWithContentsOfFile:levelConfigPlistLocation];
        NSString *currentLevelAsString = [NSString stringWithFormat:@"level%d", 1];
        NSArray *hexPositions;
                if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad){
            hexPositions = [[levelConfig valueForKey:currentLevelAsString] valueForKey:@"hexpositionIpad"];

        }
        else{  
            hexPositions = [[levelConfig valueForKey:currentLevelAsString] valueForKey:@"hexpositionIphone"];     
        }


        NSString *whichType = [NSString stringWithFormat:@"glass"]; 
        CGSize screenSize = [CCDirector sharedDirector].winSize;

        if ([whichType isEqualToString:@"stone"]){        
            hexagon = [CCSprite spriteWithFile:@"octagonstone.png"];
        }else if([whichType isEqualToString: @"glass"]){
            hexagon = [CCSprite spriteWithFile:@"octagoncolored1.png"];    
        }else if([whichType isEqualToString: @"metal"]){
            hexagon = [CCSprite spriteWithFile:@"octagonmetal.png"];    
        }
        NSMutableDictionary *eHexagons =[[GameStateSingleton sharedMySingleton] getExistingHexagons]; 
        for (int i=0;i < [hexPositions count];i++){
        CGPoint location = CGPointFromString([hexPositions objectAtIndex:i]); 
        CGPoint nLocation= ccp(screenSize.width/2 + 68 * location.x,screenSize.height/2 + 39 * location.y);  

            NSString *aKey = [NSString stringWithFormat:@"hexagon%d",i];

            hexagon =[CCSprite spriteWithFile:@"octagoncolored1.png"];

            hexagon.position = nLocation;
            [eHexagons setObject:hexagon forKey:aKey];
            [self addChild:[eHexagons valueForKey:aKey] z:3];
            [[GameStateSingleton sharedMySingleton]setExistingHexagons:eHexagons];


        }   
        NSLog(@"these are the existinghexagons %@", existingHexagons);
        //This returns a dictionary with one (null) object 
    }
    return hexagon;
}

HelloWorldLayer.m - ＆gt; -(id)init方法

Hexagon *nHex = [[Hexagon alloc]init];

Answer 1

首先，它返回null，因为existingHexagons数组从未初始化过。转到单身人士的init功能并添加：

existingHexagons = [[NSMutableArray alloc]init];

至于你的For循环问题，我没有得到它。我建议每个查询生成一个StackOverflow问题，而不是将二合一放在一起。

单身人士出了点问题...无法添加孩子，因为它是零

1 个答案: