ios – JSON写入中的类型无效(NSConcreteData)？

概述我正在使用AFNetworking发布带有一些数据的音频.我得到以下异常. *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (NSConcreteData)' 我正在使用此代码.. dict=@{@"access_token 我正在使用AFNetworking发布带有一些数据的音频.我得到以下异常.

*** Terminating app due to uncaught exception 'NSinvalidargumentexception',reason: 'InvalID type in JsON write (NSConcreteData)'

我正在使用此代码..

dict=@{@"access_token":[defaults valueForKey:@"TOKEN"],@"email":email,@"prayer":passData};if ([NSJsONSerialization isValIDJsONObject:dict]) {        NSLog(@"Proper JsON Object");    }    NSError *error;    NSData *JsonData = [NSJsONSerialization dataWithJsONObject:dict options:NSJsONWritingPrettyPrinted error:&error];    NSURL *URL = [NSURL URLWithString:url];    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL                                                           cachePolicy:NSURLRequestReloadIgnoringCacheData  timeoutInterval:10];    [request sethttpMethod:@"POST"];    [request setValue: @"application/Json" forhttpheaderFIEld:@"Content-Type"];    [request sethttpBody:JsonData]; AFhttpRequestoperation *op = [[AFhttpRequestoperation alloc] initWithRequest:request];    op.responseSerializer = [AFJsONResponseSerializer serializerWithReadingOptions:NSJsONReadingallowFragments];    [op setCompletionBlockWithSuccess:^(AFhttpRequestoperation *operation,ID responSEObject) {}

我需要以这种格式发布值

{    "access_token" = 2cf0d8a66654fa4f;    email = "";    prayer =     {        audio = <63616666 00010000 64657363 00000000 00000020 40e58880 00000000 696d6134 00000000 00000044 00000040 00000002 00000000 6b756b69 00000000 00000000 66726565 0000000> 98903013 31faae9c bb7b0780 80808080>;        "category_ID" = "";        description = "";        "expired_date" = "Expiration Date";        "is_audio" = 1;        "is_urgent" = 0;        "prayer_access_ID" = "";        "prayer_type_ID" = 1;        subject = "";    };}

我不知道为什么会发生这种情况,我之前用这种格式发布了值,但是当我尝试将音频作为数据发布时,我得到了这个例外.
提前致谢

编辑

我在这里制作数据

NSData *audiofile=[self audioData]; if (audiofile==nil) {        [passData setobject:@"" forKey:@"audio"];        [passData setobject:@"0" forKey:@"is_audio"];    }else{        [passData setobject:audiofile forKey:@"audio"];        [passData setobject:@"1" forKey:@"is_audio"];    }-(NSData *)audioData{    NSArray *dirPaths = NSSearchPathForDirectorIEsInDomains(                                                            NSdocumentDirectory,NSUserDomainMask,YES);    Nsstring *docsDir = [dirPaths objectAtIndex:0];    Nsstring *soundfilePath = [docsDir                               stringByAppendingPathComponent:@"recordTest.caf"];    NSURL *url = [NSURL fileURLWithPath:soundfilePath];    NSData *audioData=[NSData dataWithContentsOfURL:url];    return audioData;}

这就是我插入音频文件

解决方法 问题是你不能把NSData放在JsON中.音频是NSData.正如NSJsONSerialization documentation所说：

An object that may be converted to JsON must have the following propertIEs:

The top level object is an NSArray or NSDictionary.

All objects are instances of Nsstring,NSNumber,NSArray,NSDictionary,or NSNull.

All dictionary keys are instances of Nsstring.

Numbers are not NaN or infinity.

如果要在JsON中包含NSData,则必须将其转换为字符串.常见的方法是对其进行base64编码(然后在目标中对base64字符串进行解码).

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