Issues with iOS 4.2 (working on 4.1, 4.3 and 4.2.1)

Question

I have an app that is working fine on my physical device running 4.2.1 iOS.

On the emulator it works fine in 4.1 and 4.3.. however if I try to run the app on the 4.2 emulator, some interface elements (buttons, segmented controllers etc) do not appear, at all.

I have tried changing the build targets to 4.1 and 4.2 to no avail.

I am beyond confused, obviously if I build with a 4.3 target, I can no longer run on my physical device, but if I have it set to 4.2 or 4.1 I can run it on my device running 4.2.1 no problem. Also if I build with 4.1 as the target I can run it on my 4.1 emulator as well with no problem. The problem seems purely on the 4.2 iOS emulator.

Is this a known issue? Is there something I need to worry about? What, if anything, can I do here?

is the 4.2 emulator just screwed up?

Answer 1

Each of the iphone simulator versions keeps its own copies of the app. try deleting the app's directory from ~/Library/Application\ Support/iPhone\ Simulator/4.2, it is possible that the nib changed, but isn't being copied in for some reason... do a clean before you build.