App Extension Support Manage the interaction between an app extension and its hosting app. TopicsExtension SupportNSExtensionRequestHandlingNSExtensionContextShare ExtensionsSupporting suggestions in your app’s share extensionAttachmentsNSItemProviderNSExtensionItemAdd Functionality to Finder with Action ExtensionsHost App InteractionNSUserActivityNSUserActivityDelegate See AlsoApp SupportTask ManagementResourcesNotificationsErrors and ExceptionsScripting Support