Build own "SDK" to put in other 3rd application
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I have to create "library" that allow other developers use it in their applications.
My library will be simple -

developer will call our lib's api f.e. create button (pre-defined in our lib) and add to his subview.

**What is the best way to create this kind of lib? 
Should it be "static" library or smth else?**

Thanks