Getting Xcode4 and using iPhone SDK 3.1.3 with it

Question

I have currently installed version of xcode is 3 and iPhone SDK which I am using is 3.1.3. Now what I want is that I just want the Xcode 4 not iOS 4 sdk. That means I just want to upgrade my Xcode to Xcode 4. How to do that and I am offline. So how to upgrade if I do not have internet on my Mac.

Answer 1

If you use iOS 4 SDK you can still compile for 3.1.3 - set the "iOS Deployment Target" in the "Info" of the Targets and the project to 3.1.3.

If you want to upgrade to XCode 4, you have to be a registered developer (it's still in beta, so it's not available to anyone else until final release) and transfer it via a USB stick, CD etc. It's not available through the usual Mac Software Update.