I os2 2

iOS 2PiTechnologies

A H M E D Y O S S E F

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Agenda

iOS Architecture

Cocoa Touch Layer

Media Layer

Core Services Layer

Core OS

Most Used

iOS Architecture


iOS Layers

Cocoa Touch Layer

Media Layer

Core Service Layer

Core OS Layer

Objective-C

Objective-C

C

C


What is Layer

Layer is a group of frameworks, has common purpose.

In general you don’t use all layers, you also don’t use all frameworks in certain used layer.


What is Framework ?

Framework: is a directory that contains a dynamic shared library and the resources (such as header files, images, helper applications, and so on) needed to support that library.

Framework: helps you to write applications independent of the hardware.

Core OS Layer


Layer Role

The Core OS layer contains the low-level features that most other technologies are built upon. Even if you do not use these technologies directly in your applications, they are most likely being used by other frameworks. And in situations where you need to explicitly deal with security or communicating with an external hardware accessory, you do so using the frameworks in this layer.


Main Frameworks

Accelerate.framework

ExternalAccessory.framework

Security.framework

System.framework

Threading, Networking, Files IO, Standard IO, Memory and Math

Core Service Layer


Layer Role

The Core Services layer contains the fundamental system services that all applications use. Even if you do not use these services directly, many parts of the system are built on top of them.


Main FrameworksAddress Book framework (AddressBook.framework)

CFNetwork Framework (CFNetwork.framework)

Core Data Framework (CoreData.framework)

Core Foundation Framework (CoreFoundation.framework)

Core Media Framework (CoreMedia.framework)

Core Telephony Framework (CoreTelephony.framework)


Main FrameworksEventKit Framework (EventKit.framework)

Foundation Framework (Foundation.framework)

Core Location Framework (CoreLocation.framework)

Mobile Core Services Framework(MobileCoreServices.framework)

Store Kit Framework (StoreKit.framework)

SQLite library

System Configuration Framework (SystemConfiguration.framework)

Quick Look Framework (QuickLook.framework)

Media Layer


Layer Role

The Media layer contains the graphics, audio, and video technologies geared toward creating the best multimedia experience available on a mobile device. The technologies in this layer were designed to make it easy for you to build applications that look and sound great.


Main Frameworks - VideoCore Video (CoreVideo.framework)

Core Text Framework (CoreText.framework)

Image I/O Framework (ImageIO.framework)

Assets Library Framework (AssetsLibrary.framework)

Core Graphics Framework (CoreGraphics.framework)

Quartz Core Framework (QuartzCore.framework)

OpenGL ES framework (OpenGLES.framework)


Main Frameworks - AudioAV Foundation framework (AVFoundation.framework)

Core Audio Frameworks (CoreAudio.framework, AudioToolbox.framework and AudioUnit.framework)

Open Audio Library (OpenAL)

Media Player framework (MediaPlayer.framework)

Core Midi Framework (CoreMIDI.framework)

Cocoa Touch Layer


Layer Role

The Cocoa Touch layer contains the key frameworks for building iOS applications. This layer defines the basic application infrastructure and support for key technologies such as multitasking, touch-based input, push notifications, and many high-level system services. When designing your applications, you should investigate the technologies in this layer first to see if they meet your needs.


Main Frameworks

AddressBookUI.framework

EventKitUI.framework

GameKit.framework

iAd.framework

MapKit.framework

MessageUI.framework

UIKit.framework

Most Used


Most Used Frameworks

During development you mainly need two frameworks:

UIKit framework - Cocoa framework

Foundation framework - Core service framework


UIKit.framework

The UIKit framework (UIKit.framework) provides the key infrastructure for implementing graphical, event-driven applications in iOS

Main Features:

User interface,

Graphics

Touch events


Foundation.framework

The Foundation framework (Foundation.framework) provides Objective-C wrappers to many of the features found in the Core Foundation framework

Main Features:

Collection data types (arrays, sets, and so on)

String management, Date and time management

Raw data block management

Preferences management

URL and stream manipulation

Threads and run loops

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