*installs lib in project*
*opens xcode*
*tries to use lib*
*doesn‘t work, restarts xcode*
*tries to use lib*
*doesn‘t work, restarts xcode*
*tries to use lib*
*doesn‘t work, restarts xcode*
*tries to use lib*
*doesn‘t work, restarts xcode*
*tries to use lib*
*doesn‘t work, restarts xcode*

Whatever it works now...

13 seconds later...

Build failed: 13 errors
*declares variable xxx*
*uses it*
„There‘s no variable: xxx“

Xcode life 😎