How to develop for iphone 3.1.3 without re-downloading the whole SDK

I have downloaded the latest iphone SDK which support developing for the ipad 3.2 and iphone 3.1.2

However 2 days ago the firmware 3.1.3 has been released by apple so my question is how to make my SDK to support this new firmware without re-downloading the whole SDK which is more than 2 gigs?

开发者_运维百科Thanks

You can install them to different paths. I recommend installing the 3.1.3 SDK to /Developer and the 3.2 SDK to /Developer (Prerelease). Then, launch whichever version of Xcode you want to use.

Maybe you can simply symlink the 3.1.2 SDK to 3.1.3? I think that was advised in the past when a minor update came out.

Unfortunately, it is the additional tools, not the SDK that take up a large chunk of the 2.5GB+ download size. The official response is there are no SDK only downloads. So you're kind of stuck with the download.

If you're looking to try make 2 SDKs available to you at once, well that's a different question.