This is my code:
NSData *imageData = UIImageJPEGRepresentation(imageView.image, 100);
request.requestMethod = @"POST";
[request addData:imageData withFileName:@"image.jpg" andContentType:@"image/jpeg" forKey:@"image"];
[request setPostValue:_albumID forKey:@"aid"];
[request startAsynchronous];