InjectionIII

Code injection allows you to update the implementation of functions and any method of a class, struct or enum incrementally in the iOS simulator without having to perform a full rebuild or restart your application. This saves the developer a significant amount of time tweaking code or iterating over a design. Effectively it changes Xcode from being a "source editor" to being a "program editor" where source changes are not just saved to disk but into your running program directly.