Error Domain = NSCocoaErrorDomain Code = 3840"无法使用AFNetworking完成操作

Question

我使用AFNetworking库使用POST方法在服务器上发布数据.

以下是我的代码

- (void) callLoginAPI:(NSDictionary *)dictProfile{
    // 1
    NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:[dictProfile valueForKey:@"name"], @"username",
                                                                    [dictProfile valueForKey:@"first_name"],@"first_name",
                                                                    [dictProfile valueForKey:@"last_name"],@"last_name",
                                                                    [dictProfile valueForKey:@"email"],@"email",
                                                                    [dictProfile valueForKey:@"birthday"],@"dob",
                                                                    [dictProfile valueForKey:@"gender"],@"gender",
                                                                    [[dictProfile valueForKey:@"location"] valueForKey:@"name"],@"location",
                                                                    [dictProfile valueForKey:@"timezone"],@"timezone",
                                                                    @"",@"language",
                                                                    [NSString stringWithFormat:@"http://graph.facebook.com/%@/picture?type=large",[dictProfile valueForKey:@"id"]],@"profile_pic_url",
                                                                    @"",@"cover_pic_url",nil];



    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];



    [manager POST:@"http://10.1.81.35:8000/api/login/" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"JSON: %@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];
}

但我得到了以下错误的回应

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x797f2620 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

我无法理解代码有什么问题.

Answer 1

问题来自响应解析.您正在尝试反序列化JSON响应(必须包含在a NSArray或中NSDictionary)但是您的响应不是上述(很可能是一个简单的字符串).

另外,尝试将"允许片段"设置为响应序列化器.

AFJSONResponseSerializer *responseSerializer = [AFJSONResponseSerializer serializerWithReadingOptions:NSJSONReadingAllowFragments];

Answer 2

可能是您需要身份验证才能访问JSON响应.像这样设置身份验证:

[manager.requestSerializer setAuthorizationHeaderFieldWithUsername:@"XYZ" password:@"xyzzzz"];

试试这个:

AFJSONResponseSerializer *responseSerializer = [AFJSONResponseSerializer serializerWithReadingOptions:NSJSONReadingAllowFragments];
[self setResponseSerializer:responseSerializer];

代替:

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer = [AFJSONRequestSerializer serializer];