Seminar on iOS4

8/8/2019 Seminar on iOS4

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Seminar on iOS4


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INTRODUCTION

iOS4 is Apple's mobile operating system

based on unix, mac os x.

iOS4 is based on the concept of directmanipulation, using multi-touch gestures.

iOS4 brings a handful of crucial features--

like multitasking and a unified e-mail in-

box--that Apple's products have lacked for

far too long


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Company / developer Apple Inc.

Programmed in C, C++, Objective-C

OS family Mac OS X/Unix-like

Working state Current

Initial release June 21, 2010

Available languages Multilingual

Supported platforms ARM (iPhone, iPod Touch and iPad)

Kernel type Hybrid (Darwin)Default user interface Cocoa Touch (Multi-touch, GUI)

License Proprietary EULA except for open source

components

Official website iOS Dev Center


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Layers of abstraction

Core os layer

Core services layer

Media layer Cocoa touch layer


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Core services layer

Cocoa touch layer

includes device manager ,display support ,network

services and internet security.

It also helps to protect system from interference of

external destructive program.

Cocoa Touch is an API for building software programs to run

on the iPhone, iPod Touch, and iPad from Apple Inc.

The Cocoa Touch frameworks that drive iOS4 apps werebuilt with a special focus on touch-based interfaces and

optimization.


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Application Development

With the iOS SDK 4, you can get started developing your

iOS application for iPad, iPhone, and iPod touch.

Development tools in ios4

xcodeiPhone simulator

instruments

interface builder

Development Resources

Apple developer forum

iOS Reference Library


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Application life cycle

iOS4 supports applications execution in background

however till iPhone OS 3.x (iOS 3.x) background

execution of was not supported.

UIKit, loads the applications user interface and start itsevent loop.

At key points in the applications life, UIKit sends

messages to the Third Party application's delegate

object to let it know what is happening.


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Depiction of events on iOS4


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Features

Multitasking

Virtual Keyboard

Bluetooth Keyboard Support

Home Screen

Unified inbox

Camera Zoom

Geolocation

Safari Search

Game Center

FaceTime


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Advantages

The Camera Functions Folder Settings

Unified Inbox

Disadvantages

Semi-thread message

There is no real features upgrade for iPod

Mail does not support attachment


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Known Issues AVFoundation Xcode

LLVMGCC and LLVM compiler are now included as

optional compilers for iPhone development.

Interface Builder

iOS 4 includes a new UINib class to support rapidlyunarchiving nib files.

Gamekit

The desiredPlayers property has been removed from theGKMatchRequest class.


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Software updates

ImageIoAn uninitialized memory access issue exists inImageIO's handling ofBMP images.

Application Sandbox

The Application Sandbox does not preventapplications from directly accessing the user's photo

library. Libsystem

A buffer overflow exists in the floating point binary to

text conversion code within Libsystem. LibXml

Multiple use after free issues exist in libxml2, themost serious of which may lead to an unexpected

application termination.


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Comparing iOS4

Folder navigation isnt friendly in android whereas in ios4

you can easily navigate between folders ,select or

deselect the messages.

iOS4 remembers the address of senders youreply.android doesnt do so.

Android OS 2.2 supports just a limited set of Exchange

ActiveSync (EAS) policies.

Although iOS 4's EAS support is nowhere near asextensive as what BlackBerry and Windows Mobile offer,

it remains the most compliant of any new-gen mobile OS


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EpitomeWith the introduction of iOS4 apple marks significant and

welcome jump in iPhone evolution. But still long way to

travel in order to compete with newer technologies such

as meego of nokia ,newer versions of android etc.


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THANK YOU

Seminar on iOS4

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