Code Quiz

Background Task Ends Too Early

Spot why a background upload gets killed when the app moves to the background state.

Codeswift

func applicationDidEnterBackground(_ application: UIApplication) {
    let taskID = application.beginBackgroundTask(withName: "Upload") {
        // expiration handler
    }

    DispatchQueue.global().async {
        self.uploadPendingData()   // network work, takes several seconds
    }

    application.endBackgroundTask(taskID)
}

What is the bug in this background-state handling code?

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