O'Reilly logo

Xcode 4 iOS Development by Steven F. Daniel

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Layers of the iOS architecture

Apple describes the set of frameworks and technologies that are currently implemented within the iOS operating system as a series of layers. Each of these layers is made up of a variety of different frameworks that can be used and incorporated into your applications:

Layers of the iOS architecture

We will now go into detail and explain each of the different layers of the iOS Architecture; this will give you a better understanding of what is covered within each of the Core layers.

The Core OS layer

This is the bottom layer of the hierarchy and is responsible for the foundation of the operating system which the other layers sit on top of. This important ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required