NSExtension

The names of the intents that an extension supports.

A Boolean value indicating whether the Action extension is presented in full screen.

Properties of an app extension.

The name of the app extension’s main storyboard file.

A Boolean value indicating whether the app extension ignores appearance changes made by the host app.

The extension point that supports an app extension.

The custom class that implements an app extension’s primary view.

The content scripts for a Safari extension.

The context menu items for a Safari extension.

The style sheet for a Safari extension.

The items to add to the toolbar for a Safari extension.

The webpages a Safari extension can access.

The services provided by an app.

The name of your watchOS app’s extension delegate.

The bundle ID of the widget that's available as a Home screen quick action in apps that have more than one widget.