ImageUploadManager | based multi-threaded parallel general image upload framework | Map library

I am trying to upload images selected by a user from their gallery, and then keep uploading them even if the user puts my app in background/suspended state and then starts using some other app.

But, along with image I want to send some dictionary parameters in httpBody (like the "Pro_Id") of the request keeping the image in multipart uploading

Background upload multiple images using single NSURLSession uploadTaskWithRequest

I have done the following as answered in Background upload multiple images using single NSURLSession uploadTaskWithRequest:

To upload in a background session, the data must first saved to a file.

1. Save the data to file using writeToFile:options:.
2. Call NSURLSession uploadTaskWithRequest:fromFile: to create the task. Note that the request must not contain the data in the HTTPBody otherwise the upload will fail.
3. Handle completion in the URLSession:didCompleteWithError: delegate method.
4. You may also want to handle uploads which complete while the app is in the background.

Implement 1. application:handleEventsForBackgroundURLSession:completionHandler in the AppDelegate. 2. Create an NSURLSession with the provided identifier. 3. Respond to the delegate methods as per a usual upload (e.g. handle the response in URLSession:didCompleteWithError:) 4. Call URLSessionDidFinishEventsForBackgroundURLSession when you have completed processing the event.