[Solved] How to pass background task identifier to completion handler?

user443854 Asks: How to pass background task identifier to completion handler?
I see many examples using a class member variable to pass the value of background task to completion block:

Code:
self.bgTask = UIApplication.sharedApplication()
    .beginBackgroundTaskWithName("bg task", expirationHandler: { () -> Void in
        UIApplication.sharedApplication().endBackgroundTask(self.bgTask)
        self.bgTask = UIBackgroundTaskInvalid
        })

If this code is called twice, second time while the first background task is still running, then self.bgTask will get overwritten with the new task’s identifier, and UIApplication.sharedApplication().endBackgroundTask(self.bgTask) may never get called.

If I declare a local variable instead, then its value is captured by closure before being initialized. No good either.

How can I pass task ID to its completion handler safely? If my reasoning above is wrong, please correct me.

Ten-tools.com may not be responsible for the answers or solutions given to any question asked by the users. All Answers or responses are user generated answers and we do not have proof of its validity or correctness. Please vote for the answer that helped you in order to help others find out which is the most helpful answer. Questions labeled as solved may be solved or may not be solved depending on the type of question and the date posted for some posts may be scheduled to be deleted periodically. Do not hesitate to share your response here to help other visitors like you. Thank you, Ten-tools.