如何在objective-c中处理json格式的嵌入式数组

概述我有一个叫做数组的字典： { "encoding": "320", "format": "MP3", "media": "CD", "name": "foo", "remaster_title": "" }, { "encoding": "V0 (VBR)", 我有一个叫做数组的字典：

{        "enCoding": "320","format": "MP3","media": "CD","name": "foo","remaster_Title": ""    },{        "enCoding": "V0 (VBR)","name": "bar",{        "enCoding": "Lossless","format": "FLAC","remaster_Title": "hoho"    }

我想将它们分开,以便它们是独一无二的.例如,应该只有一个名称,因此将有两个部分：foo和bar.

然后在每个名称(foo或bar)内应该有remaster_Title(对于foo：和bar都是：和hoho)….

这应该是顺序：name> remaster_Title>媒体>格式>编码.

我认为如果我的格式类似于：

music[name][remaster_Title][media][format] = enCoding

那么所有的密钥会合并吗？

我试过了：

+(NSMutableDictionary*)handleReturnedArtistJson:(NSDictionary*)Json{    NSMutableDictionary *music = [[NSMutableDictionary alloc] init];    for(NSDictionary *result in Json[@"response"][@"group"]) {        Nsstring* release_type = result[@"releaseType"];        Nsstring* name = result[@"groupname"];        if (![release_type  isEqual: @"Compilation"]){            for (NSDictionary *subgroup in result[@"subgroup"]){                Nsstring* media = subgroup[@"media"];                Nsstring* remaster_Title = subgroup[@"remasterTitle"];                Nsstring* format = subgroup[@"format"];                Nsstring* enCoding = subgroup[@"enCoding"];                music[name][remaster_Title][media][format] = enCoding;            }        }    }    return music;}

但NSLog(@“％@”,音乐);没有回报.

解决方法 评论区域太小,无法提出几个问题,但让我们假设一些事情.您想要将JsON解析为对象树.让我们看看这段代码是否有帮助.

#import <Foundation/Foundation.h>typedef NSMutableDictionary<Nsstring*,Nsstring*> formatDictionary;typedef NSMutableDictionary<Nsstring*,formatDictionary*> mediaDictionary;typedef NSMutableDictionary<Nsstring*,mediaDictionary*> TitleDictionary;typedef NSMutableDictionary<Nsstring*,TitleDictionary*> nameDictionary;@interface DataSource : NSObject- (nameDictionary*)parseJsONfile:(Nsstring *)Jsonfile error:(NSError *__autoreleasing *)outError;@end

履行

@implementation DataSource- (Nsstring *)valueOrDefaultFromDictionary:(NSDictionary *) dictionary forKey: (Nsstring *) key{    Nsstring * value = dictionary[key];    if (![value length]) {        return @"";    }    return value;}- (NSArray *)JsonToArray:(Nsstring *)Jsonfile error:(NSError *__autoreleasing *)outError{    Nsstring *path  = [[NSBundle mainBundle] pathForResource:Jsonfile ofType:@"Json"];    Nsstring *JsonString = [[Nsstring alloc] initWithContentsOffile:path enCoding:NSUTF8StringEnCoding error:nil];    NSError *JsonError;    NSArray *JsonDataArray = [NSArray new];    JsonDataArray = [NSJsONSerialization JsONObjectWithData:[JsonString dataUsingEnCoding:NSUTF8StringEnCoding] options:kNilOptions error:&JsonError];    if (JsonDataArray == nil) {        if (outError) {            *outError = [NSError errorWithDomain:@"yourdomain" code:-42 userInfo:@{NSUnderlyingErrorKey: JsonError}];        }        return nil;    }    return JsonDataArray;}- (nameDictionary*)parseJsONfile:(Nsstring *)Jsonfile error:(NSError *__autoreleasing *)outError{    NSArray * JsonDataArray = [self JsonToArray:Jsonfile error:outError];    if (!JsonDataArray) {      return nil;    }    nameDictionary* music = [nameDictionary new];    [JsonDataArray enumerateObjectsUsingBlock:^(ID _Nonnull obj,NSUInteger IDx,BOol * _Nonnull stop) {        Nsstring * name = [self valueOrDefaultFromDictionary:obj forKey:@"name"];        Nsstring * Title = [self valueOrDefaultFromDictionary:obj forKey:@"remaster_Title"];        Nsstring * media = [self valueOrDefaultFromDictionary:obj forKey:@"media"];        Nsstring * format = [self valueOrDefaultFromDictionary:obj forKey:@"format"];        Nsstring * enCoding = [self valueOrDefaultFromDictionary:obj forKey:@"enCoding"];        music[name] = [@{Title: [@{media: [@{format:enCoding} mutablecopy] } mutablecopy] } mutablecopy];    }];    return music;}@end

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