Upload Completion (Finish or Defer)

Goal

When the app is suspending and an upload is pending, try to finish quickly; if time is about to expire, save-for-retry.

Actions used

• TaskServicesStartTaskAndAllowInBackground

• TaskServicesCancelTask

Flow

1. When uploadPending == true and app is suspending:

   • Start background allowance (TaskServicesStartTaskAndAllowInBackground)

   • Do the upload in the next state.

   • On success/failure, call TaskServicesCancelTask and clear/set your pending flags.

2. If quotaWillExpireEvent fires:

   • Cancel/stop the upload work if possible.

   • Save the payload locally and set a “retry on next launch” flag.

   • Call TaskServicesCancelTask.

Notes

• Keep the upload small and bounded; don’t rely on long background time.

• Assign quotaWillExpireEvent on TaskServicesStartTaskAndAllowInBackground and add it as a Global Transition to your “SaveForRetryNow” state.