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iOS 4 in Action: Developing iPhone and iPad Apps by Shannon Appelcline, Christopher Allen, Brandon Trebitowski, Jocelyn Harrington

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Chapter 21. Introducing multitasking

 

This chapter covers
  • Overview of multitasking on iOS 4
  • Fast app switching
  • Finishing a task in the background
  • Monitoring location change in the background

 

iOS 4 is muscled up with tons of exciting new features. We’ve covered the Game Kit framework, local notifications, the Event Kit framework, GCD, and iAd in previous chapters. In this chapter, it’s time to introduce multitasking! Multitasking is a feature that has been requested on iOS since its first release. But there’s limited screen size and battery life on the iPhone or iPad, so generally only one application is visible and active at a time. In iOS 4 and later, with multitasking introduced, applications can continue running in the background. ...

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