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Editorial Team
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Asked: 2026-05-12T11:19:14+00:00

I don’t believe that I am using any 3.0 specific APIs, but somehow whenever

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I don’t believe that I am using any 3.0 specific APIs, but somehow whenever I compile I get a warning “This project uses features only available in iPhone SDK 3.0 and later”, and then a bunch of errors. If I change the Base SDK to 3.0, the warning & errors go away, but then of course I cannot target OS 2.2.1

I see that this is coming from the project_Prefix.pch file, which I assume was created when the XCode initially created the project. I don’t see how this file gets included, but I believe this is the source of the problem. I tried removing it, but then the build won’t compile at all.

Do I need to regenerate this file somehow?

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1 Answer

  1. Editorial Team

    Silly me- I was in fact using a 3.0 API. I had the following:

      controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;

    Removing this line fixed the problem.

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