Xcode may fail stating that it can't find a ShaderType.h file. If that is the case, simply go to your build settings, search for "bridging". Head over to 'Objective-C Bridging Header' and make sure to remove the path as shown in the image below
Xcode may fail stating linker issues. If that is so, make sure to add the "Untold Engine" framework to Link Binary With Libraries under the Build Phases section.