What is the use-case for this library compared to Xcode - Export for Localization and import?

I am trying to better understand the use-case for this library compared to the standard localisation workflow in Xcode.

In the readme you say:

LocalizedStringKit is a tool that lets you write English strings directly into your source code and generate the required .strings files later. No more manually managing string keys or remembering to add them to the strings file later. All you do is change:
label.text = NSLocalizedString("TERMS_SCREEN_MAIN_HEADER", "Comment here...")
...

If you use NSLocalizedString, you can write English strings directly into the source code as the key parameter (in the same way as with the replacement function in this library). Then to generate the strings files for the other languages, in Xcode,

1. Select the project in the sidebar
2. Select, menu item Editor -> Export for Localization
3. Add the target translations to the resulting XLIFF
4. Then import again with Editor -> Import Localisation
   Result: Xcode will create the strings files and add them to the project

Furthermore, If you alternatively use keys such as NSLocalizedString("my.string.a", ..), you can export the development language, in the same way as described above, and import to generate the strings file for the development language.

Is this library for when you don't use Xcode, or don't want to use the xliff-based workflow (for some reason)?

Review the README's description alongside the Xcode Editor → Export for Localization and Import Localization workflow described in the issue. Clarify the library's intended use case and whether it targets projects that do not use Xcode or the XLIFF workflow; done when the README clearly compares these approaches.