6. Adding a Library Target
The passer_rating function is a tremendous achievement—and hard-won. It plainly has applications beyond that simple command-line tool, so let’s encapsulate its services for use in other programs.
All right, no, it isn’t, but doing so will introduce some important skills. So, you can create a static library (an archive of reusable code) for passer_rating, moving its code from the passer-rating tool into the new library, and linking it back into the tool.
Adding a Target
You don’t need to start a new project to create a library—it’s better if you don’t. Open the passer-rating project in Xcode and click the top entry, representing the project, in the Project navigator. This brings up the Project/Target editor.
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