如何从现有的xcode项目中创建用于unity的静态iOS库

I have a fully functional iOS project. I would like to create a static library from it, that I can use some of the methods in Unity. Is that even possible? Or do I have to create a new Xcode project as a static library and copy paste everything? I am using the latest versions of unity and Xcode. I have a fully functional iOS project. I would