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This chapter is from the book



  1. Background tasks can be anything you want in iOS 4.0. True or false?

  2. Any application you compile for iOS 4.0 will continue to run when the user exits it. True or false?

  3. Only a single long-running background task can be marked background completion. True or false?


  1. False. Apple has a well-defined set of rules for implementing background processing in iOS 4.0.
  2. False. Applications will suspend in the background by default. To continue processing, you must implement background tasks as described in this hour's lesson.
  3. False. You can mark as many long-running tasks as you'd like, but they must all complete within a set period of time (around 10 minutes).


  1. Return to a project in an earlier hour and properly enable it for background processing.
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