如何在Xcode中创建可重用代码集?

I am developing an iPhone app and have to parse xml files in order to put them into a database. I will also be using those same xml parsers in my app so users can import their own data. I was wondering how I can extract those xml parsers into a bundle or a library so I can use them both in my iPhone app and in a command line app where I just populate a sqlite3 database.I am developing an iPhone app and have to parse