How To POST JSON Parameters Using AFNetworking?

First convert JSON string to NSDictionary:

NSError *error;NSData *objectData = [@"{\"1\":\"2\"}" dataUsingEncoding:NSUTF8StringEncoding];NSDictionary *json = [NSJSONSerialization JSONObjectWithData:objectData                                      options:NSJSONReadingMutableContainers                                         error:&error];

Then you can send this dictionary with AFNetworking. In version 3 you should use AFHTTPSessionManager:

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];[manager POST:@"your_URL" parameters:json progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {    NSLog(@"Complete");} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {    NSLog(@"Fail");}];

Finally I found a solution to my problem. What I was doing is making NSDictionary of NSDictionary for my JSON parameters. Below is the full solution code.

NSString *loginURL = @"http://myappdev.dev/login"; NSDictionary *parameters = @{@"application": @{@"identifier": @"appDev"}, @"sso": @{@"version": @"2.0", @"session_expiry":@43200}, @"user": @{@"password":@"xxxx~!@", @"username":@"xxx0min"}, @"coordinate": @{@"latitude":@10.9948629, @"longitude":@-169.5213749}};    NSLog(@"params : %@", parameters);    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];    manager.requestSerializer = [AFJSONRequestSerializer serializer];    [manager POST:loginURL parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSLog(@"JSON Successsss: %@", responseObject);        NSLog(@"operation Successsss: %@", operation);    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"Error laaa: %@", error);    }];