Using Swift with an OS X Preference Pane plugin

Question

I\'d like to use Swift to build an OS X Preference Pane plugin for the System Preferences app, but I can\'t get it to work.

After clicking \"Next\" the Xcod

Answer 1

First, you need to enable the "Embedded Content Contains Swift" setting so that Xcode will copy the necessary Swift libraries into the bundle.

Then, you get this error:

System Preferences[68872]: dlopen_preflight failed with
  dlopen_preflight(/.../preftest.prefPane/Contents/MacOS/preftest):

  Library not loaded: @rpath/libswiftAppKit.dylib
    Referenced from: /.../preftest.prefPane/Contents/MacOS/preftest  
    Reason: image not found for /.../preftest.prefPane

This means the app doesn't know where to load the included Swift libraries from.

To fix this, add @loader_path/../Frameworks to the runpath search paths in the build settings, telling it that the Swift libraries are in the Frameworks directory of your prefpane:

See the dyld man page for further info about dynamic loading.

Answer 2

There was an Apple bug introduced with macOS High Sierra. This bug is now resolved in the latest dot release of macOS. See https://github.com/klaas/QlaasSwiftPreferencesPane for a working sample project.