Notifications

An informal protocol that objects adopt to be notified of changes to the specified properties of other objects.

A container for information broadcast through a notification center to all registered observers.

A notification dispatch mechanism that enables the broadcast of information to registered observers.

A notification center buffer.

A notification dispatch mechanism that enables the broadcast of notifications across task boundaries.

Manage your app’s work and how it interacts with system services like Handoff and Shortcuts.

Access assets and other data bundled with your app.

Manage the interaction between an app extension and its hosting app.

Respond to problem situations in your interactions with APIs, and fine-tune your app for better debugging.

Allow users to control your app with AppleScript and other automation technologies, or run scripts from within your app.