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Originally Posted by dmaul1114
I do have a question about the OS 4 multi tasking.
Is it true multi-tasking in that one could be reading or whatever and also have an instant messenger program running and some indicator of when a new message came through etc.?
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You can do that now with push notifications. IM isn't one of the background services that will be offered in 4.0.
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The videos I saw just showed ways to switch between apps--which is ok, but not a big improvement since it's already easy to switch between apps. Maybe a bigger deal if it saves progress in things like games where you currently are usually reset if you exit out to do something else.
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There are several different components to the multitasking - one is the background services I mentioned, that will allow things like GPS, audio streams, and downloads to continue running in the background while you're in another app. Another is the fast app switching, and the ability for the OS to save apps in their current state.
You can do this now by having a listener in your app that can respond to "your application is going to be terminated" notices from the OS (so you can save important information and put the user back where they were when they reopen the app), but devs won't have to do anything special in 4.0 to implement it anymore; that capability will be baked into the OS.