Image upload using AFMultipartFormData AFNetworking 3.0 - objective-c

Question

NSURL *URL = [NSURL URLWithString:#"some APi"];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
UIImage *myImageObj = [UIImage imageNamed:#"avatar.jpg"];
NSData *imageData= UIImagePNGRepresentation(myImageObj);
[manager POST:URL.absoluteString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData
name:#"file"
fileName:#"avatar.jpg" mimeType:#"image/jpeg"];
// etc.
} progress:nil success:^(NSURLSessionDataTask *task, id responseObject) {
NSLog(#"Response: %#", responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
NSLog(#"Error: %#", error);
}];
I am trying to upload image using afnetworking 3.0 but getting this error every time
Domain=com.alamofire.error.serialization.response Code=-1011 "Request
failed: internal server error (500)"
UserInfo={com.alamofire.serialization.response.error.response= { URL: Some URL } { status
code: 500, headers {
"Access-Control-Allow-Origin" = "*";
"Content-Length" = 291;
"Content-Type" = "text/html";
Date = "Thu, 26 Jan 2017 11:41:19 GMT";
Server = "Werkzeug/0.11.11 Python/2.7.12"; } },

Answer 1

luckily postman provide objective-C and some other languages code but with AFNetworking i used this
NSURL *URL = [NSURL URLWithString:#"your URL"];
UIImage *myImageObj = [UIImage imageNamed:#"image.jpg"];
NSData *imageData= UIImageJPEGRepresentation(myImageObj, 0.6);
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
//manager.responseSerializer=[AFJSONResponseSerializer serializer];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
[manager.requestSerializer setValue:#"multipart/form-data" forHTTPHeaderField:#"Content-Type"];
[manager POST:URL.absoluteString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData
name:#"file"
fileName:#"image.jpg" mimeType:#"image/jpeg"];
// etc.
} progress:nil success:^(NSURLSessionDataTask *task, id responseObject) {
NSLog(#"Response: %#", responseObject);
NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
NSLog(#"%#",string);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
NSLog(#"Error: %#", error);
}];