Do new Apple SDKs patch previous releases?

Posted by Francisco Garcia on Stack Overflow See other posts from Stack Overflow or by Francisco Garcia
Published on 2012-09-15T15:34:44Z Indexed on 2012/09/15 15:37 UTC
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iphone

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ios

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cocoa

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apple

A new iPhone will be soon out there along a new iOS release. Sooner or later there will also be a Xcode upgrade with the SDK for iOS 6

Does Apple do any type of bugfix on previous SDKs or are bugfixes just solved on new releases?

As an example: Core Data with iCloud still have some issues but it is getting better over time. Let's say I have an app that really depends on that combo. I would require iOS6, however not all users upgrade the handsets. Ideally an app compiled with a newer XCode release could patch some error on previous SDKs if the target is set to an older iOS release.

Should I expect that a project compiled with future SDK releases to work better on devices running on older iOS versions? will be some SDKs bugfixes backported?

I understand that there are some bugs that cannot be fixed without an iOS update on the client. Also that it is a lot of work (and unlikely) to backport bugfixes. I am just wondering what is the normal release policy of Apple.

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