如何从NSObject方法访问值？

Question

这是NSObject类

FileHandler.h

@interface fileHandler : NSObject

@property(nonatomic,strong) NSMutableArray *arrCategoryList;
@property(nonatomic,strong) NSMutableDictionary *dicCategoryList;
@property(nonatomic,strong) NSMutableDictionary *dicAllSubCategoryList;
@property(nonatomic,strong) NSMutableDictionary *dicProductList;



+(fileHandler *)getDataHandler;
-(void)categoryStorage:(NSMutableArray *)arrCategory :(NSMutableDictionary *)dicCategory :(NSMutableDictionary *)dicSubCategory;
-(void)addCategoryList:(NSMutableDictionary *)holeArray;
-(void)addSubCategories:(NSMutableDictionary *)dictCategory;

-(void)releaseData;
@end

这是NSObject Class .m

FileHandler.m

static fileHandler *internalInstance=Nil;
static dispatch_once_t internalOnceToken=0;

@implementation fileHandler
-(id)init
{
    self=[super init];
    [self allocateMemory];
    return self;

}

+(fileHandler *)getDataHandler
{

    dispatch_once(&internalOnceToken,^{
        internalInstance = [[fileHandler alloc] init];
        if(internalInstance) {
            NSLog(@"Internal instance created: %@", internalInstance);
        }
    });
    if(internalOnceToken == -1) {
        NSLog(@"Internal instance exists: %@", internalInstance);
    }
    return internalInstance;

}
-(void)allocateMemory
{       NSLog(@"incoming");
        self.arrCategoryList=[[NSMutableArray alloc]init];
        self.dicCategoryList=[[NSMutableDictionary alloc]init];
        self.dicAllSubCategoryList=[[NSMutableDictionary alloc]init];
        self.dicProductList=[[NSMutableDictionary alloc]init];
}
-(void)categoryStorage:(NSMutableArray *)arrCategory :(NSMutableDictionary *)dicCategory :(NSMutableDictionary *)dicSubCategory
{

        self.arrCategoryList=arrCategory;
    NSLog(@"arrcatewelcome%@",self.arrCategoryList);
        self.dicCategoryList=dicCategory;
        self.dicAllSubCategoryList=dicSubCategory;
    NSLog(@"welcome%@",arrCategory);
    NSLog(@"%@",dicCategory);
    NSLog(@"%@",dicSubCategory);
}
-(void)addCategoryList:(NSMutableDictionary *)holeArray
{
    self.dicCategoryList=holeArray;
    NSLog(@"insidehandler");
}
-(void)addSubCategories:(NSMutableDictionary *)dictCategory
{
    self.dicAllSubCategoryList=dictCategory;
}
-(void)releaseData
{
    self.arrCategoryList=nil;
    self.dicAllSubCategoryList=nil;
    self.dicProductList=nil;
    self.dicCategoryList=nil;
}
@end

这是另一个类，我在NSObject类中提到了数组和字典的值。

collectionAntZ.m

 -(void)responseFunction:(NSMutableDictionary *)response
{
    BOOL sucess;
    sucess =[[response objectForKey:@"sucess"]boolValue];
    NSLog(@"response Method%@",response);
    NSLog(@"%hhd",sucess);
    NSString *subimages;
    if(!sucess)
    {
        ArrCategory =[response objectForKey:@"category"];

        for(NSDictionary *DicHoleCategories in ArrCategory)
        {

              NSMutableDictionary *DicAllValues=[[NSMutableDictionary alloc]init];

              [DicAllValues setObject:[[DicHoleCategories objectForKey:@"name"] length]  !=0?[DicHoleCategories objectForKey:@"name"] :@"" forKey:@"name"];
              [DicAllValues setObject:[DicHoleCategories objectForKey:@"category_id"] forKey:@"category"];

              StrName=[DicHoleCategories objectForKey:@"image"];
              [DicAllValues setObject:[DicHoleCategories objectForKey:@"subcategory"] forKey:@"subcategory"];

              if(StrName!=nil)
              {
                subimages=[NSString stringWithFormat:LocalImage"%@",StrName];
                [DicAllValues setObject:subimages forKey:@"image"];
                [arrImages addObject:[DicAllValues objectForKey:@"image"]];
              }
              [ArrName addObject:DicAllValues];


              [dicAllValues setObject:DicAllValues forKey:@"hole"];
        }
               arrSubCategory=[ArrName valueForKey:@"subcategory"];
               [dicSubCategory setObject:[arrSubCategory valueForKey:@"parent_id"] forKey:@"parent"];
               [dicSubCategory setObject:[arrSubCategory valueForKey:@"image"] forKey:@"image"];
               [dicSubCategory setObject:[arrSubCategory valueForKey:@"name"] forKey:@"name"];
                NSLog(@"array of sub category%@",dicSubCategory);
               **[file categoryStorage:ArrCategory :dicAllValues:dicSubCategory];
               [file addCategoryList:dicSubCategory];**

尝试访问.m文件中的另一个类

@property(nonatomic ,retain)fileHandler *handler;
@end

@implementation orderVC



- (void)viewDidLoad {
    [super viewDidLoad];
  #pragma mark file handle

    NSLog(@"orderarray%@",self.handler.arrCategoryList);
    NSLog(@"dictionary objects %@",self.handler.dicAllSubCategoryList);

在这里，我发布我的问题请任何人解释为什么我没有在另一个类中访问NSobject类值。