Third-party multitasking finally makes an appearance on the iPhone

It's been just over a year since Apple last held an event touting the latest and greatest version of its iPhone OS. In March 2009, the big features that Apple brought to the table with iPhone OS 3.0 included copy/paste, push notifications, and push notifications (to make up for the lack of third-party multitasking).

Today, Apple is back at it again with iPhone OS 4.0. As has been widely speculated for the quite some time now, Apple is finally enabling third-party multitasking on the iPhone OS (iPhone, iPod touch, iPad). As the rumors suggested, double tapping the home button now brings up a “multitasking dock” which shows up to four programs running at once (here's a video of multitasking in action). The user then selects the application they want and "boom", you're there. As you would expect, the current application state is saved as you're double tapping in and out of apps.

For a demo, Apple's Scott Forstall showed off an app that has probably been the poster child for the multitasking movement on the iPhone: Pandora. Previously, if you wanted to listen to streaming music in Pandora while performing another task, it wasn't possible (without jailbreaking). The new multitasking APIs of iPhone OS 4.0 now make what seems like a no-brainer feature possible. As an added bonus, Pandora can now be controlled from the lock screen.


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