This document summarizes a technical seminar presentation on Apple's iOS mobile operating system. The presentation covered the history and architecture of iOS, developments in iOS versions, and new features in iOS 5. It discussed the core layers and frameworks that make up the iOS architecture, including the core OS layer, core services layer, media layer and Cocoa Touch layer. It also provided an overview of the iOS software development kit and Xcode tools used for iOS application development.

1. VISVESVARAYA TECHNOLOGICAL UNIVERSITY BELGAUM
Technical Seminar
On
“Apple iOS”
By
CHETHAN H A
4GH08CS010
Under the guidance of
Mr.Annaiah.,B.E.,M.Tech
Asst.professor
Seminar co-ordinator Head of the Department
Mr.Chethan K.C.,B.E,M.Tech Dr. K.C Ravishankar B.E., M.Tech., Ph.d
Professor & Head,Dept.of
Asst.professor
CS&E, GEC,Hassan

2. Apple iOS
February 16 2012

3. Mobile Operating System
o Initially released in june 2007
o Programmed in C ,C++ and objective C
o Derived from Mac os X
o Available in 34 languages worldwide
o Developed for iPhone and extended to iPod
Touch and iPad
o The Kernel Type is Hybrid Kernel Architecture

4. The iOS Architecture
Similar to basic architecture found in Mac OS X
 Acts intermediate between applications and hardware
iOS
Apps
Hardware

5. The Layers in iOS Architecture Technology
 Consists of four Abstraction layers
• Core OS Layer
• Core service Layer
• The Media Layer
• The Cocoa Touch Layer
Uses Darwin foundation and therefore a unix like OS
 The user interface of iOS is based on the concept
of direct manipulation, using multi-touch gestures.

7. The core of iOS
Contains the low-level features such as
Accelerate Framework (Accelerate.framework)
This framework contains interfaces for performing DSP,
linear algebra, and image-processing calculations
Core Bluetooth (CoreBluetooth.framework)
This framework allows developers to interact specifically
with Bluetooth Low-Energy ("LE") accessories
External Accessory Framework (ExternalAccessory.framework)
This framework provides support for communicating with
hardware accessories attached to an iOS based device

8. Core services Layer
Contains the High-level features that all applications use such as
iCloud Storage
lets your application write data to a central location and access
those items from all user’s computers and iOS devices
Core services framework
Includes Accounts.framework, AddressBook.framework and
CoreData.framework for user accounts ,contacts and for
managing model-view-controller application
iCloud

9. Media Layer
The Media layer contains the graphics, audio, and video technologies
Graphics Technologies
Includes Core Graphics , Core Animation and OpenGL technologies
which handles 2D vector and animating views and 2D and 3D figures
Audio Technologies
Supports rich audio experince and audio formats like AAC, Apple
Lossless(ALAC),A-Law and Linear PCM
Video technologies
The iOS support the playback of movie files with the .mov, .mp4, .m4v,
and .3gp filename extensions

10. Compression standards in Video Technologies
● H.264 video, up to 1.5 Mbps, 640x480 pixels, 30 frames
per second
• H.264 video, up to 768 Kbps, 320x240 pixels, 30 frames
per second
• MPEG-4 video, up to 2.5 Mbps, 640x480 pixels, 30 frames
per second
Media layer also consists of different frameworks like
CoreAudio.framework, CoreImage.framework and
CoreText.framework

11. Cocoa Touch Layer
The Cocoa Touch layer contains the key frameworks for building iOS
applications
The layer defines the basic application and
support for key technologies such as
multitasking, touch-based input,push
notifications, and many high-level system
services
Cocoa Touch follows a Model-View-
Controller (MVC) software architecture

12. The iOS Development
The iOS SDK (Software Development kit)
 Includes interfaces,tools and resources
 Includes special packages called Frameworks
 A framework is a directory that contains a dynamic shared library and the
resources (such as header files, images, helper applications, and so on)
Key Components of SDK
 Xcode Tools
 Xcode  Instruments
 iOS simulator
 iOS Developer Library

13. Xcode Tools
• Xcode is a suite of tools used for developing softwares
for Mac OS X and iOS
• An Integrated Development Environment (IDE) that
manages to edit,compile,run and Debug source code
• Xcode suite supports C, C++, Objective C, Objective
C++, Java, AppleScript, Python and Ruby source
code with a variety of programming models
• Instruments are the runtime performance analysis and debugging Tools
• iOS Simulator is a Mac OS X application that simulates the iOS technology
stack, allowing you to test iOS applications on Macintosh computer

14. Xcode Version series
 1.x series
 2.X series
 3.x series
 4.x series
The latest stable release is Xcode version 4.2.1, which is available
on the Mac App Store

15. iOS Distribution

16. iOS Version History
On June 29, 2007, Apple released the first version of iOS
 iOS 1.x: initial OS
 iOS 2.x: second major OS
 iOS 3.x: third major OS
 iOS 4.x: fourth major OS
 iOS 5.x: fifth major OS
The Latest Stable release is version 5.0.1 (Build 9A406) for iPhone 4 S
The Latest Stable release is version 5.0.1(Build 9A405) for iPhone,iPhone 3G,
iPhone 3GS ,iPhone 4,iPod Touch and iPad
The Latest unstable release is version 5.1(Build 9B5141a)

17. New features in iOS 5
iMessages/Messages - Allows to send text,photos,videos,contacts
and locations and shows when other person(s) is typing
Mail - Rich text formatting (bold, italics and underline)
- MIME support
Safari - Ability to open pages in background or in new page
iCluod - iTunes, iBooks, Photo, Contacts, Calendar, Notes, Reminders,
Mail, Safari bookmarks and device settings, app data, iWork and
backup data saved in iCloud and automatically or manually
downloaded to all linked devices
YouTube - Ability to play 480p/720p videos over 3G (iPhone only)
Game center - Photos for friends
- Ability to make your Profile public or private

19. Market Share

20. Conclusion
The objective of the seminar was to study and enhance
our knowledge about Apple iOS , mobile operating
system. We have learnt about the new features of the
iOS 5 operating system.
 So we have learnt about the layers of iOS technology viz.
core OS, core services, media and cocoa touch.
 The fact that all the information regarding iOS cannot
be bound in this Presentation, I have tried to cover
almost all points that made study of iOS worthy.

21. Any Q?

22. ThanQ You