ExtensionsManjula Jonnalagadda

What are they

• Plug in programs

• Run independently

• Universal

Types of Extensions• Today

• Appears in Notification centers

• Share

• Share in your app

• Action

• Change the View, Contents

• Photo Editing

• Add filters, etc

• Document Providers

• Custom Keyboards

Life cycle

Communication

App to Extension communication

APIs Unavailable• sharedApplication

• Anything with NS_EXTENSION_UNAVAILABLE

• Access to camera or microphone

• Long running background tasks

• Receive data via AirDrop

Remember• Shared frameworks cannot use restricted APIs

• Enable App groups and shared containers to share data using NSUserdefaults, Coredata, SQLite

• Get results from webpages by using Javascript

• Perform uploads and download using backgroundSessions

• Declare supported data types and use NSExtensionActivationRule predicate