Published by Arunprasadh C on 19 Apr 2022 • Last Updated on 19 Apr 2022
The general architecture of iOS consists of four layers as shown below:
All the iOS technologies are build on the low level features provided by the Core OS layer. These technologies include Core Bluetooth Framework, External Accessory Framework, Accelerate Framework, Security Services Framework, Local Authorisation Framework etc.
There are many frameworks available in the core services layer. Details about some of these are given as follows :
The data can be moved between the app the iCloud using the Cloudkit Framework.
This provides the data management and service features for the iOS apps.
The data model of the model view controller app is handled using the Core Data Framework.
The address book framework provides access to the contacts database of the user.
All the motion based data on the device is accessed using core motion framework.
The health related information of the user can be handled by this new framework.
This framework provides the location and heading information to the various apps.
The media layer enables all the graphics, audio and video technology of the system. The different frameworks are :
This provides support for designing images and animating the view content.
This provides support for 2-D vector and image based rendering and is the native drawing engine for iOS apps.
The Core Animation technology optimizes the animation experience of the apps.
This framework provides support for playing playlists and enables the user to use their iTunes library.
This provides various easy to use interfaces for video presentation.
The cocoa touch layer provides the following frameworks :
This shows the standard system interfaces using view controllers for viewing and changing calendar related events.
This provides support for users to share their game related data online using Game center.
This provides a scrollable map which can be included into the app user interface.
Before moving on to Swift, we will see why iOS is quite good and is popular among consumers.
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