You might think you were in luck when Xcode offered you an option to migrate to XCTest, but shortly after trying you will discover that this isn't a true migration. Xcode will only migrate your code, it will not update your project to be testable with XCTest. There are still some steps left and unfortunately Apple have not shared any documentation on how to do this.

You can follow these steps to migrate your project to XCTest once you've migrated the code with the automatic converter:

This blog post accompanies a talk I recently gave at NSLondon, you can find the slides for this talk here. There will also be a video version of this out shortly, I will post a link once it's out on my Twitter.

ARC is a very powerful feature introduced in Xcode in 4.0, along with various run-time enhancements. With the introduction of ARC, a lot has changed under the hood. The Objective-C run-time has a completely new interface for using many of the old concepts such as autorelease ...

Wouldn't it be great if your iOS or OS X projects just take their version and build number automatically from git? Well, it can!

Using a script in your build phase, you can run a shell to determine the version number and inject this into the Info.plist of a build. It will never modify your local project, just the created build.

GIT_RELEASE_VERSION=$(git describe --tags --always --dirty)
COMMITS=$(git rev-list HEAD | wc -l)
COMMITS=$(($COMMITS))
defaults write "${BUILT_PRODUCTS_DIR}/${INFOPLIST_PATH%.*}" "CFBundleShortVersionString" "${GIT_RELEASE_VERSION#*v}"
defaults write "${BUILT_PRODUCTS_DIR}/${INFOPLIST_PATH%.*}" "CFBundleVersion" "${COMMITS}"