file has been modified since the precompiled header was built

Question

So I accidentally modified a header (CBCentralManager.h) and caused the above error to show when I build. I searched stack overflow for the solution, and found

Answer 1

Try going to your Organizer -> Projects, and you'll see the path for where you're derived data is saved. Mine looks something like "~/Library/Developer/Xcode/DerivedData/[Project name]-[mumbo jump]"

Delete the "[Project name]-[mumbo jump]" folder, and you should be all good.