JsonString,字典,模型之间相互转换

NSData转字符串
[NSString alloc] initWithData: encoding:]

模型转字典
attInfo.keyValues

字典转模型
ZTEOutputInfo *outputInfo = [ZTEOutputInfo objectWithKeyValues:responseObject];

模型转Json字符串
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:attInfo.keyValues
                                                   options:NSJSONWritingPrettyPrinted
                                                     error:nil ];
NSString* jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding] ;

综合例子:
+ (void)checkAttatchStatus:(ZTEATTInfo *)attInfo t:(NSString *)t
success:(void (^)(NSMutableDictionary *response))success failure:(void (^)(NSError *error))failure{

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:attInfo.keyValues
                                                       options:NSJSONWritingPrettyPrinted
                                                         error:nil ];
    NSString* jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding] ;

    ZTEInputInfo *inputInfo = [[ZTEInputInfo alloc] init];
    inputInfo.C = @"SubmitMCL";
    inputInfo.D = jsonString;
    //    CCLog(@"----D:%@",attInfo.keyValues);
    ZTEFilterInfo *filterInfo = [[ZTEFilterInfo alloc] init];
    filterInfo.K = @"ID";
    filterInfo.V = t;
    inputInfo.F = @[filterInfo];

    NSString* serverip = [ZTEServerAddrMng checkMailStatusAddr2];

    [kAppDelegate.netManager  postPath:serverip parameters:inputInfo.keyValues
                  postDataEncodingType:PostDataEncodingTypeJSON
                               success:^(EMMHTTPRequestOperation *operation, id responseObject) {
                                   CCLog(@"Success: %@", responseObject);

                                   ZTEOutputInfo *outputInfo = [ZTEOutputInfo objectWithKeyValues:responseObject];
                                   CCLog(@"-------%@",outputInfo.keyValues);

                                   if ([outputInfo.S integerValue ] == 1) {
                                       if (success) {
                                           NSMutableDictionary *resultDict = [NSJSONSerialization JSONObjectWithData:[(NSString *)outputInfo.D dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableLeaves error:nil];
                                           success(resultDict);
                                       }
                                   }else{
                                       [ZTETipInfoView showTipWithMessage:outputInfo.M andState:KaBuTipInfoState_Failed];
                                   }

                               } failure:^(EMMHTTPRequestOperation *operation, NSError *error) {
                                   CCLog(@"Error: %@", error);
                                   [ZTETipInfoView showTipWithMessage:@"网络错误" andState:KaBuTipInfoState_Failed];
                                   if(failure){
                                       failure(error);
                                   }
                               }];

}