AFJSONRequestOperation在iOS中返回空响应

在使用AFJSONRequestOperation时，我面临1个问题。我的API客户端如下

    #import <Foundation/Foundation.h>
#import "AFHTTPClient.h"
#import "AFJSONRequestOperation.h"

@interface MyAPIClient : AFHTTPClient

+ (MyAPIClient *)sharedAPIClient;

@end

// .m file
#import "MyAPIClient.h"


@implementation MyAPIClient

+ (MyAPIClient *)sharedAPIClient {

    static MyAPIClient *sharedClient = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedClient = [[MyAPIClient alloc] initWithBaseURL:[NSURL URLWithString:kBASE_URL]];
    });
    return sharedClient;
}

- (id)initWithBaseURL:(NSURL *)url {

    self = [super initWithBaseURL:url];
    if (!self) {
        return nil;
    }
    [self registerHTTPOperationClass:[AFJSONRequestOperation class]];

    [self setDefaultHeader:CONTENT_TYPE_FIELD value:CONTENT_TYPE_JSON_VALUE];
    self.parameterEncoding = AFJSONParameterEncoding;
    return self;
}

@end

但是，当我使用AFHTTPRequestOperation时，它会将正确的输出与登录的已用信息一起返回

NSURL *loginUrl = [NSURL URLWithString:kBASE_URL];

    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:loginUrl];

    NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                            userName,@"email",password,@"password",nil];
    NSMutableURLRequest *request = [httpClient requestWithMethod:@"POST" path:@"login" parameters:params];

    //Notice the different method here!
    AFHTTPRequestOperation *operation = [httpClient HTTPRequestOperationWithRequest:request
                                                                            success:^(AFHTTPRequestOperation *operation, id responseObject)
    {
        NSLog(@"Raw data Response: %@", responseObject);
        NSMutableArray *jsonArray = [NSJSONSerialization JSONObjectWithData:responseObject options:kNilOptions error:nil];
        NSLog(@"Converted JSON : %@", jsonArray);

    }
    failure:^(AFHTTPRequestOperation *operation, NSError *error){
        NSLog(@"Error: %@", error);
    }];

    //Enqueue it instead of just starting it.
    [httpClient enqueueHTTPRequestOperation:operation];

我的服务器返回JSON响应。 上面代码中的问题是什么？为什么AFJSONRequestOperation在

---

AFHTTPRequestOperation返回正确的响应？感谢您的任何帮助。提前感谢

我最终使用了AFHTTPRequestOperation而不是AFJSONRequestOperation。

NSURL *loginUrl = [NSURL URLWithString:kBASE_URL];

    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:loginUrl];

    NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                            userName,@"email",password,@"password",nil];
    NSMutableURLRequest *request = [httpClient requestWithMethod:@"POST" path:@"login" parameters:params];

    //Notice the different method here!
    AFHTTPRequestOperation *operation = [httpClient HTTPRequestOperationWithRequest:request
                                                                            success:^(AFHTTPRequestOperation *operation, id responseObject)
    {
        NSLog(@"Raw data Response: %@", responseObject);
        NSMutableArray *jsonArray = [NSJSONSerialization JSONObjectWithData:responseObject options:kNilOptions error:nil];
        NSLog(@"Converted JSON : %@", jsonArray);

    }
    failure:^(AFHTTPRequestOperation *operation, NSError *error){
        NSLog(@"Error: %@", error);
    }];

    //Enqueue it instead of just starting it.
    [httpClient enqueueHTTPRequestOperation:operation];