8INTERPROCESS COMMUNICATION
Interprocess communication (IPC) on iOS is, depending on your perspective, refreshingly simple or horribly limiting. I mostly consider it to be the former. While Android has flexible IPC mechanisms such as Intents, Content Providers, and Binder, iOS has a simple system based on two components: message passing via URLs and application extensions. The message passing helps other applications and web pages invoke your application with externally supplied parameters. Application extensions are intended to extend the functionality of the base system, providing services such as sharing, storage, and the ability to alter the functionality of the Today screen or keyboard.
In this chapter, you’ll learn about the various ways ...
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