05 May 2021

Networking with Background Tasks in iOS 13

background fetch network server request call

Reading time: 4 min

This recipe shows how to perform a GET request in the background using BGTaskScheduler and BGAppRefreshTaskRequest. For whatever reason, this has way too many gotchas:

  • You can't use Alamofire, you have to use URLSession.
  • You can use URLSessionDataTask, it has to be a URLSessionDownloadTask. Why? Beats me.
  • You can't use callbacks, you must use delegates to track request progress and completion.

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