In most cases, you won’t need to convert third-party libraries to Swift. So, you’ll still benefit from any updates from vendors, and use those libraries from either Objective-C or Swift code.
Here’s the best way to deal with third-party libraries:
- Remove third-party files from your Xcode project;
- Convert your project;
- Add files back.
This will ensure that Objective-C filenames of third party libraries in your Xcode project file won’t get converted to corresponding Swift file names.