!!

Who A’m I ?!Name: abdimuna!Day: programmer!Night: braining, sec

OSX | iOS

Recap1. History 2. Apple | Mac 3. OSX 4. iOS 5. Objective-C 6. Conclusion

Apple | Founders

Steve Jobs & Steve Wozniak

Apple-II:

First Apple-II was released on 17, June 1977

!8-bit personal computer

Processor: 1Mhz RAM: 4KB

Mac | Macintosh

1st Mac was introduced on 24, Jan 1984

!1. First public computer with GUI 2. Used mouse 3. Processor: 8Mhz 4. RAM 64KB

NEXT

16, sept 1985 Steve jobs left Apple.inc

NeXT-Step | (NS)

Next was formed by Steve Jobs in 1985, after he left Apple.inc

NeXT-Step | (NS)

First Next computer, was released in 1888, followed by NeXT station in 1990

NEXT-Step | (NS)

Characteristics: • 32-bit system, • Processor Motorola 68030, 25Mhz • RAM: 256MB • HDD: 330 or 660MB • 10Base-2 Ethernet • 17 inch b/w monitor, res 1120x832

OSX | Birth

OSX | History

OSX | Architecture

OSX | Architecture

OSX | Darwin

Darwin is an opensource kernel

OSX | RPC

OSX | Evolution

iOS

iOS (before 24, June 2010 — iPhone OS) Is an operating system which powers apple’s

devices (iPhone, iPad, iPod-touch, Apple-TV)

OSX vs iOS• The architecture for which the kernel and binaries are compiled is

ARM-based, rather than Intel i386 or x86_64. The processors may be different (A4, A5, A5X, etc), but all are based on designs by ARM. The main advantage of ARM over Intel is in power management,

which makes their processor designs attractive for mobile operating systems such as iOS, as well as its arch-nemesis, Android.

!• The kernel sources remain closed — even though Apple promised to

maintain XNU, the OS X Kernel, as open source, it apparently frees itself from that pledge for its mobile version. Occasionally, some of

the iOS modifications leak into the publicly available sources (as can be seen by various #ifdef,__arm__, and ARM_ARCH conditionals),

though these generally diminish in number with new kernel versions.

OSX vs iOS• The kernel is compiled slightly differently, with a focus on

embedded features and some new APIs, some of which eventually make it to OS X, whereas others do not.

• The system GUI is Springboard, the familiar touch-based application launcher, rather than Aqua, which is mouse-driven and designed for windowing..

• Memory management is much tighter, as there is no nigh-infinite swap space to fall on.

• The system is hardened, or “jailed,” so as not to allow any access to the underlying UNIX APIs (i.e. Darwin), nor root access, nor any access to any directory but the application’s own. Only Apple’s applications enjoy the full power of the system. App Store apps are restricted and subject to Apple’s scrutiny.

OSX vs iOS• The kernel is compiled slightly differently, with a focus on embedded

features and some new APIs, some of which eventually make it to OS X, whereas others do not.

• The system GUI is Springboard, the familiar touch-based application launcher, rather than Aqua, which is mouse-driven and designed for windowing..

• Memory management is much tighter, as there is no nigh-infinite swap space to fall on. As a consequence, programmers have to adapt to harsher memory restrictions and changes in the programming model.

• The system is hardened, or “jailed,” so as not to allow any access to the underlying UNIX APIs (i.e. Darwin), nor root access, nor any access to any directory but the application’s own. Only Apple’s applications enjoy the full power of the system. App Store apps are restricted and subject to Apple’s scrutiny.

OSX vs iOSThere some differences in API point of view !• O S X : C o c o a - A P I e . g N S -

(Button,View..) • iOS: UITouch, or Cocoa-Touch e.g UI-

(Button, View)

Objective-C

Is the general purpose programming language which adds some SmallTalk-style messaging in C (developed

in early-80’s).

• Designed by: Brad Cox & Tom Love • Was selected as the main language used by NeXT for its

NEXTSTEP OS • Now: is the language powering both OSX & iOS

Objective-C |

Its: • OOP (adds object capabilities to pure C) • dynamic, (U-can determine which messages to send to

at runtime, and not at compile time) • Single inheritance, (NSObject is the super class of

all subclasses)

Objective-C |

• Delegation (Like callBacks, powerful) • Protocols, (acts as substitute for multiple inheritance,

like java interfaces) • Categories, (Adds functionality to an existing classes

aka adding some more methods for an existing classes)

Objective-C |

• Notifications (Objects can register for Notifications

events) • KVC/KVO, (Accessing object properties by key or by

value, Listening for object’s properties change) • Blocks, (Powerful feature added in iOS-4, & OSX-10.6,

They enable you to do powerful operations e.g concurrencies )

Objective-C | GCD

• dispatch_object_t • dispatch_source_t • dispatch_queue_t • dispatch_group_t • dispatch_semaphore_t • dispatch_time_t • dispatch_once_t

GCD: simply is the multi-threading API

Objective-C | Apple

Objective-C | File ext

Objective-C | Data-types

Objective-C | class

Objective-C |ex

Objective-C | Implementation

Objective-C | method

Objective-C | sms-sent

Objective-C | example

Objective-C | dot

Objective-C | ex

Objective-C |ex

Objective-C | MultiThreading

dispatch_queue_t exampleQueue = dispatch_queue_create( “com.abdimuna1.myApp”, NULL ); dispatch_sync( exampleQueue, ^{ // // DO SOME STUFF HERE }); dispatch_release( exampleQueue );

Objective-C | Xcode

Is tool(GUI) for compiling, debugging, designing: Objective-C, C, or C++

projects

Objective-C | Xcode

Objective-C | compiling in cmd

Objective-C | Libraries

QA .?Thanks

sources:

Apple: https://developer.apple.com/library/mac/documentation/cocoa/conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html