How can I install an older version of the iPhone SDK (v3.1.2) to work with the latest GM?

Question

I installed the latest GM of the iPhone SDK and now I can't build and compile many of the example projects on the Apple iPhone dev site. When I load them, the configuration bar says "Base SDK is missing." It appears the example project I'm trying to build (QuartzDemo) is trying to build against the v3.1.2 SDK. How can I install an older version of the iPhone SDK that works with the latest GM? Or how can I get this project to build with the current GM version of the SDK?

Thanks so much in advance for your help!

Answer 1

Change the base SDK of the project to 4.0; 3.1.3 and earlier aren't supported.