I'm using AppCode for few weeks now, and recently I got the following error when compiling:
Building target 'Newsfeed' with configuration 'Debug' for architecture 'i386' using 'Simulator - iOS 4.3' sdk
No architectures to compile for (ARCHS=i386, VALID_ARCHS=armv6 armv7).
Build Finished with Error: 1
When compiling using the XCode everything is fine.
This means I can't compile anymore, which is a blocker for me (back to the xcode).