Jump to content

Multitasking (iOS)

Change links
From Simple English Wikipedia, the free encyclopedia
Revision as of 06:05, 1 September 2017 by 94.254.164.46 (talk)

Features

Fast app switching

Fast app switching lets apps to pause and resume themselves quickly and easily change to other apps.[1]An app that is on the screen is "running". An app that is not on screen but is still in memory is "suspended".[2] All apps that are built with iOS 4 SDK support fast app switching if running on iOS 4 and a compatible device.[3] Users can use fast app switching by opening the multitasking bar. The multitasking bar can be displayed by double-tapping the home button.[2][4]

Task completion

Task completion lets apps continue a certain task after the app has been suspended.[5][6] Apps can ask for up to ten minutes to complete a task in the background in iOS 4.0 or later.[7]

Running in the background

Apps can run in the background by using background APIs. The following are available in iOS 4.0 or later:[8][9]

  • Audio—plays audio
  • Location—uses location services
  • VOIP—makes VOIP calls

The following two APIs were added in iOS 5.0:[10]

  • Newsstand—downloads content for Newsstand
  • External accessory—interacts with an external accessory

References

  1. ↑ Shimpi, Anand (June 22, 2010). "Apple's iOS 4 Explored". AnandTech. Retrieved April 14, 2013.
  2. ↑ 2.0 2.1 Perenson, Melissa (June 8, 2010). "Multitasking on Apple's iPhone 4: How Does It Work?". PCWorld. Retrieved April 14, 2013.
  3. ↑ https://developer.apple.com/library/ios/#releasenotes/General/WhatsNewIniOS/Articles/iPhoneOS4.html#//apple_ref/doc/uid/TP40009559-SW1
  4. ↑ Cite error: The named reference ArsTechnica1 was used but no text was provided for refs named (see the help page).
  5. ↑ Snell, Jason (April 8, 2010). "Inside iPhone 4.0's multitasking". MacWorld. Retrieved April 14, 2013.
  6. ↑ "Apple iPhone 4". CNet. June 23, 2010. Retrieved April 14, 2013.
  7. ↑ Hollington, Jesse (June 21, 2010). "Instant Expert: Secrets & Features of iOS 4". iLounge. Retrieved April 14, 2013.
  8. ↑ Newman, Jared (June 22, 2010). "Multitasking With iOS 4 is Horrible: Apple Blew It". PCWorld. Retrieved April 14, 2013.
  9. ↑ Diaz, Jesus (April 8, 2010). "How Multitasking Works in the New iPhone OS 4.0". Gizmodo. Retrieved April 14, 2013.
  10. ↑ Speirs, Fraser (January 4, 2012). "How iOS multitasking really works". MacWorld. Retrieved April 14, 2013.
Retrieved from "https://simple.wikipedia.org/w/index.php?title=Multitasking_(iOS)&oldid=5780832"