'Cannot find interface declaration' in auto-generated Swift bridging header

Question

My current project contains both Swift and Objective-C code. Both types of source file use code from the other language. When I do a full clean and recompile, I get errors on a

Answer 1

In Obj-C files, you need to import the swift module (with #import "Module-Swift.h").

Do this only in the files where you are going to use types defined in your Swift module.