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    <p>It's first worth adding (as this answer is still popular 6 years after I initially wrote it...) that the first thing you should consider is whether you should even use AFNetworking. NSURLSession was added in iOS 7 and means you don't need to use AFNetworking in many cases - and one less third party library is always a good thing.</p> <p>For AFNetworking 3.0:</p> <pre><code>AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; NSDictionary *params = @{@"user[height]": height, @"user[weight]": weight}; [manager POST:@"https://example.com/myobject" parameters:params progress:nil success:^(NSURLSessionTask *task, id responseObject) { NSLog(@"JSON: %@", responseObject); } failure:^(NSURLSessionTask *operation, NSError *error) { NSLog(@"Error: %@", error); }]; </code></pre> <p>For AFNetworking 2.0 (and also using the new NSDictionary syntax):</p> <pre><code>AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; NSDictionary *params = @{@"user[height]": height, @"user[weight]": weight}; [manager POST:@"https://example.com/myobject" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) { NSLog(@"JSON: %@", responseObject); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Error: %@", error); }]; </code></pre> <p>If you are stuck using AFNetworking 1.0, you need to do it this way:</p> <pre><code>NSURL *url = [NSURL URLWithString:@"https://example.com/"]; AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url]; NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys: height, @"user[height]", weight, @"user[weight]", nil]; [httpClient postPath:@"/myobject" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) { NSString *responseStr = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]; NSLog(@"Request Successful, response '%@'", responseStr); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"[HTTPClient Error]: %@", error.localizedDescription); }]; </code></pre>
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    1. COThank you very much Joseph it worked very well. I just had a question after I alloc the httpClient I release it after creating the request, I dont seem to have any crashes and seems to work well. I just wanted to confirm that that is the correct spot to release it. Thank you very much again. Kind Regards
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    2. COYes, that would works. The AFHTTPClient is really intended to be kept around and used again if you make another request, but releasing it straight after the 'requestWithMethod:' call is acceptable.
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    3. COHi Joseph, I finally got it working with a json response and I set up another question http://stackoverflow.com/questions/7630289/afnetworking-post-request-with-json-feedback to really know whether I am doing it right. Thanks so much sorry to bother.
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