To start building an xcode library, make sure that you set the packaging of your pom.xml to xcode-library as seen below:
<packaging>xcode-library<packaging>
Generally you will consume an xcode library with an iOS application in this plugin. Assuming you have a packaging of "xcode-application" all you have to do is include your library as a dependency in your dependency section
<dependency> <groupId>com.my.group<groupId> <artifactId>my-library<artifactId> <version>1.0.0<version> <type>xcode-library<type> <dependency>