"Expected selector for Objective-C Method" error when header is listed in OBC-Swift bridging-header

I am currently updating an obj-c app and adding some new classes written swift. I am trying to add a header file that imports UAObfuscatedString into my bridging-header. When I do this I get a compile error on line 53 of UAObfuscatedString.h saying "Expected selector for Objective-C method". Any ideas how to fix this?

Thanks to the contributors to this project, this is a nifty little solution.