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Application Development with Swift by Hossam Ghareeb

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Chapter 7. Swift App Extensions

We are still working with the new features and APIs introduced in iOS 8. In this chapter, we are going to talk about app extensions. App extensions are meant to give you the ability to extend your app functionality to be accessible outside your app while users use other apps or the system. In iOS 8, many extensions have been released, and in this chapter, we will talk about all these extensions. You can then decide on which extension to use, and when.

App extensions

As we said, an app extension is just a task that can be performed and accessed outside you app. For example, you can use an extension to display timely content in the Today view of the notification center.

An extension for the sports app displays the currently ...

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