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1. Re: Can you drop iOS 4 support for an app already in the App Store? What iOS version is good to target?
ChristopherTotty Sep 25, 2012 8:14 AM (in response to FLAdude)We currently target 5.1+ because it makes for a clean cutoff on iCloud compatibility.
We are required to mark our resources as 'do not backup' for iCloud, and since the method of doing this is somewhat fragmented before 5.1, we break there and use only a single method of setting the attribute.
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2. Re: Can you drop iOS 4 support for an app already in the App Store? What iOS version is good to target?
FLAdude Sep 28, 2012 6:44 AM (in response to ChristopherTotty)Any of the non-user generated resources is in the tmp or Cache folders (which are not backed up) on mine, so that shouldn't be an issue in my case.
I looked at the wiki for iOS 5 and i didn't see any developer-related features other than that 'do not back up' thing that were added between sub-versions of iOS 5, so maybe I should target 5.0?
I'm still wondering, how do you handle dropping older versions of iOS? Surly developers can't be expected to maintain support for discontinued versions of iOS forever just because their app has been around for awhile? Apps eventually need to advance and use new OS features and require performance of current devices. Just set the MinimumOSVersion key to 5.0 or whatever and that's it?
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3. Re: Can you drop iOS 4 support for an app already in the App Store? What iOS version is good to target?
ChristopherTotty Sep 28, 2012 6:46 AM (in response to FLAdude)Yep, that's it. Apple will recognize your next build as needing 5.0, and all users of below that version will be prompted they must upgrade their OS before updating.

