json - NSInvalidArgumentException'，原因：'JSON 写入中的类型无效（声音）

Question

//将配音保存到数据库

NSDictionary * dict = [NSDictionary dictionaryWithObjectsAndKeys:[DubsUtils dubUrlFromPath:trimmedDubPath], @"url", _sound, @"sound", nil];

if([NSJSONSerialization isValidJSONObject:dict])
{
    NSLog(@"Valid ... %@", dict);
    NSError *err;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&err];
    NSLog(@"Done .. err : %@ Data : %@",err,jsonData);


    PFObject *data = [PFObject objectWithClassName:@"DubsData"];
    data[@"dubs"] = dict;

    [data saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
        if (succeeded) {
            // The object has been saved.
            NSLog(@"New dub uploaded...");
        } else {
            NSLog(@"New dub Problem uploaded...");
            // There was a problem, check error.description
        }
    }];

}
else
    NSLog(@"Not Valid ... \n Detail : %@ \n data : ",dict);

O / P：无效...详细信息：{声音=“声音：热闹的海豚-url：dolphin.mp3-类别：类别n \ U00b02-名称：本地类别2-语言：en”；url = "LMHFuxhDfUb9i2tm0Qryn67eZ4kH6n.mov"; }

我想将此 dict var 对象存储在解析服务器上