iPad - supports Garbage Collector?

I know you can't use GC in iPhone applications cause iPhone does not have enough resources to enable that - it would kill the performence.

What about iPad. I know they run iPhone 开发者_StackOverflowOS too, does that mean that CG can't be enabled on the iPad as well?

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There is no Garbage Collected variant of Objective-C in the iPhoneOS. Not even iPad, nor 4.0. Probably Apple doesn't find it important to support it.

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With the incoming Xcode 4.2 (still in beta) + iOS 5 you have something almost similar called ARC..