iPhone upload multipart file using AFNetworking

In my iOS app I want to upload file with the java API using NSMutableURLRequest for multipart file. here is the form which shows parameter.

  <form action="API_URL" encType='multipart/form-data' method=post>
            <input type=file name="files">
            <input type=submit value="Upload Attempt Files">

EDIT form2

       <form action='URL' method="post" encType='multipart/form-data'>
<input name="key1" value='123'>
<input name="key2" value='asdf'>
<input name="key3" value='qwerty'>
<input name="key4" value='aaa'>
<input name="key5" value='aaa'>
<input name="key6" value='false'>
<input type="file"  name="files">
<input type=submit value="Create Forum Posts">
   </form>        

How can I achieve that?

This Question shows how to upload multipart file using AFNetworking in iOS(objective c). But I am not getting how to put parameter as per form I am using.

Looking at your HTML, the name of your <input type=file> is files, and thus, you would use @"files" as the name parameter to the appendPartWithFileData method. For example, with AFNetworking 3.x:

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

[manager POST:urlString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
    [formData appendPartWithFileData:imageData
                                name:@"files"
                            fileName:photoName mimeType:@"image/jpeg"];

    [formData appendPartWithFormData:[key1 dataUsingEncoding:NSUTF8StringEncoding]
                                name:@"key1"];

    [formData appendPartWithFormData:[key2 dataUsingEncoding:NSUTF8StringEncoding]
                                name:@"key2"];

    // etc.
} progress:nil success:^(NSURLSessionDataTask *task, id responseObject) {
    NSLog(@"Response: %@", responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
    NSLog(@"Error: %@", error);
}];

(For AFNetworking 1.x and 2.x syntax, see the revision history of this answer.)