I have an iOS project written with Objective-C. I created an Swift class in the project, the bridging header file for accessing objective-c in Swift is generated successfull
For me, the problem was that I had bitcode on. When I clicked on the "Update to recommended project settings", it changed a few settings which probably the culprit. I turned "Enabled Bitcode" to "No" in the Build Settings and it is fixed now.