如何在 objective-C 中创建多个锯齿状数组

Question

我正在做一个项目，我从嵌套了四层的服务中获取数据，我想重新创建数据。我只想拥有状态名称 = 已接受的对象。状态名称不同，一个类别中可以有多个子类别，子类别也是如此。因此我需要创建这样的东西：

Category =  {

     Key = 1;
     Name = Cars;

     subCategories =     (

                {

                   Key = 4;
                   Name  = “SUV";

                   subSubCategories =             (

                                {

                                     Key = 13;
                                     Name = “7 Seater";

                                     state =         (

                                            {

                                            Key = 8;
                                            Name = Accepted;

                    }

                );

            }

        );

    },

目前我正在使用 4 个 for 循环进入对象 4 层深并检查 [state[i] objectForKey : @"Key"]isEqual: @8]。当我尝试使用 category->subcategory->sub-subcategory->state 的正确映射重新创建对象时，我的问题就来了。我如何使用 NSMuttableArrays 重新创建这个对象。

这是我的代码：

    for (int i =0; i < categories.count; i++) {


        NSArray* subCategories= [categories[i] objectForKey: @"subCategories"];

            for (int j = 0; j < subCategories.count; j++){

                NSArray* subCategoriesA =[subCategories[j] objectForKey:@"subSubCategories"];


                    for (int k = 0; k < subSubCategoriesA.count; k++){

                        NSArray* stateA =[subSubCategories[k] objectForKey:@"state"];


                            for (int u = 0; u < state.count; u++){

                                if ( [[stateA[u] objectForKey:@"Key"]  isEqual: @8] ) {



                                // recreate category->subcategory->sub-subcategory->state  based on this condition being fulfilled


                                }

                            }

                       }

            }

    }

Answer 1

模型方法

我正在使用 swift 所以我的回答是 swift 语言

根据您的 json，您需要创建这些类

1,DataInfo

class DataInfo : NSObject {
    var key : Int!
    var Name : String!

    override init() {
        key = 0
        Name = ""
    }

    init(withInfo : [String : Any]) {
        key = withInfo["Key"] as? Int ?? 0
        Name = withInfo["Name"] as? String ?? ""
        super.init()
    }
}

2.SubSubCategories

class SubSubCategories : NSObject {
    var key : Int!
    var name : String!
    var state : [DataInfo] = []

    override init() {
        key = 0
        name = ""

    }

    init(withInfo : [String : Any]) {
        key = withInfo["Key"] as? Int ?? 0
        name = withInfo["Name"] as? String ?? ""

        if let stateDict = withInfo["state"] as? [[String : Any]] {
            for dict in stateDict {
                let stateObj = DataInfo(withInfo: dict)
                state.append(stateObj)
            }
        }

        super.init()
    }
}

3.SubCategories

class SubCategories : NSObject {
    var key : Int!
    var name : String!
    var subSubCategories : [SubSubCategories] = []

    override init() {
        key = 0
        name = ""

    }

    init(withInfo : [String : Any]) {
        key = withInfo["Key"] as? Int ?? 0
        name = withInfo["Name"] as? String ?? ""

        if let subSubCategoriesDict = withInfo["subSubCategories"] as? [[String : Any]] {
            for dict in subSubCategoriesDict {
                let subSubCategoriesObj = SubSubCategories(withInfo: dict)
                subSubCategories.append(subSubCategoriesObj)
            }
        }

        super.init()
    }
}

4.Category

class Category : NSObject {
    var key : Int!
    var name : String!
    var subCategories : [SubCategories] = []

    override init() {
        key = 0
        name = ""

    }

    init(withInfo : [String : Any]) {
        key = withInfo["Key"] as? Int ?? 0
        name = withInfo["Name"] as? String ?? ""

        if let subCategoriesDict = withInfo["subCategories"] as? [[String : Any]] {
            for dict in subCategoriesDict {
                let subCategoriesObj = SubCategories(withInfo: dict)
                subCategories.append(subCategoriesObj)
            }
        }

        super.init()
    }
}

现在所有需要的模型类都是 created.now 当你从服务器得到响应时，类别列表你只需像这样填充类别数组。

var arrayCategory : [Category] = []

for categoriesDict in categories {
    let objCategorie = Category(withInfo: categoriesDict)
    arrayCategory.append(objCategorie)
}

现在您可以在 arrayCategory 上触发 Predicate 以获取状态对象键 == 8 如何在数组上触发谓词是一个不同的问题。或者你也可以过滤 arrayCategory where state object key == 8

编辑对于 Objective C

数据信息 DataInfo.h

@interface DataInfo : NSObject {

}

@property (nonatomic, strong) NSNumber *key;
@property (nonatomic, strong) NSString *name;

- (id) initWithInfo:(NSDictionary *) withInfo;
@end

DataInfo.m

#import "DataInfo.h"

@implementation DataInfo

- (id) init {
    self = [super init];
    if (self){
        _key = 0;
        _name = @"";
    }
    return self;
}

- (id) initWithInfo:(NSDictionary *)withInfo {
        self = [super init];
        if(!self)
            return nil;

        _key = [withInfo valueForKey:@"Key"];
        _name = [withInfo valueForKey:@"Name"];

        return self;
    }

@end

SubSubCategories.h

#import <Foundation/Foundation.h>

@interface SubSubCategories : NSObject
@property (nonatomic, strong) NSNumber *key;
@property (nonatomic, strong) NSString *name;
@property (nonatomic, strong) NSMutableArray *state;

-(id) initWithInfo:(NSDictionary *) withInfo;
@end

SubSubCategories.m

#import "SubSubCategories.h"
#import "DataInfo.h"

@implementation SubSubCategories

- (id) initWithInfo:(NSDictionary *)withInfo {
    self = [super init];
    if(!self)
    return nil;

    self.key = [withInfo valueForKey:@"Key"];
    self.name = [withInfo valueForKey:@"Name"];
    self.state = [[NSMutableArray alloc] init];
    NSArray *arry = (NSArray *)[withInfo valueForKey:@"state"];
    int j;

    for (j = 0; j < arry.count; j++) {
        DataInfo *obj = [[DataInfo alloc] initWithInfo:arry[j]];
        [self.state addObject:obj];
    }
    return self;
}

@end

SubCategories.h

#import <Foundation/Foundation.h>

@interface SubCategories : NSObject
@property (nonatomic, strong) NSNumber *key;
@property (nonatomic, strong) NSString *name;
@property (nonatomic, strong) NSMutableArray *subSubCategories;

-(id) initWithInfo:(NSDictionary *) withInfo;
@end

SubCategories.m

#import "SubCategories.h"
#import "SubSubCategories.h"

@implementation SubCategories

- (id) initWithInfo:(NSDictionary *)withInfo {
    self = [super init];
    if(!self)
    return nil;

    self.key = [withInfo valueForKey:@"Key"];
    self.name = [withInfo valueForKey:@"Name"];
    self.subSubCategories = [[NSMutableArray alloc] init];
    NSArray *arry = (NSArray *)[withInfo valueForKey:@"subSubCategories"];
    int j;

    for (j = 0; j < arry.count; j++) {
        SubSubCategories *obj = [[SubSubCategories alloc] initWithInfo:arry[j]];
        [self.subSubCategories addObject:obj];
    }
    return self;
}

@end

Category.h

#import <Foundation/Foundation.h>

@interface Category : NSObject
@property (nonatomic, strong) NSNumber *key;
@property (nonatomic, strong) NSString *name;
@property (nonatomic, strong) NSMutableArray *subCategories;

-(id) initWithInfo:(NSDictionary *) withInfo;
@end

Category.m

#import "Category.h"
#import "SubCategories.h"

@implementation Category
- (id) initWithInfo:(NSDictionary *)withInfo {
    self = [super init];
    if(!self)
    return nil;

    self.key = [withInfo valueForKey:@"Key"];
    self.name = [withInfo valueForKey:@"Name"];
    self.subCategories = [[NSMutableArray alloc] init];
    NSArray *arry = (NSArray *)[withInfo valueForKey:@"subSubCategories"];
    int j;

    for (j = 0; j < arry.count; j++) {
        SubCategories *obj = [[SubCategories alloc] initWithInfo:arry[j]];
        [self.subCategories addObject:obj];
    }
    return self;
}
@end

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