I sometimes see code where the task is ended using
bgTaskID = UIBackgroundTaskInvalid
At other places I see
UIApplication.sharedApplication().endBackgroundTask(bgTaskID)
At some other places I see:
UIApplication.shared.endBackgroundTask(bgTaskID)
backgroundTask = UIBackgroundTaskInvalid
What's the difference between these three? Reading from here it seems it's just a matter of clean code, but I find that unnecessary, you've ended the task!
To me they are all the same. Only that using you UIBackgroundTaskInvalid you can validate if a task has ended or not. Not sure why you'd ever need to validate though.
Is the above assessment correct?