advertisement

A short story_of_osx_i_os

48 %
52 %
advertisement
Information about A short story_of_osx_i_os
Education

Published on March 7, 2014

Author: abdimuna1

Source: slideshare.net

Description

This is a short story of OSX and iOS, and an introduction to Objective-C, the language powering Mac OS X and iOS mobile operating system.
...In this presentation you will see how and when the OSX and iOS started,
... How OSX and IOS differ
... Introduction to Objective-C, and some key features of objective-C
...This presentation don't teach you how to become a programmer, but it gives the binding understand on how and when things came the way they are .
...
advertisement

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

Recap 1. 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. 2. 3. 4. First public computer with GUI Used mouse Processor: 8Mhz 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, AppleTV)

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 iOS There some differences in API point of view ! • • OSX: Cocoa-API e.g NS(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 GCD: simply is the multi-threading API • • • • • • • dispatch_object_t dispatch_source_t dispatch_queue_t dispatch_group_t dispatch_semaphore_t dispatch_time_t dispatch_once_t

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

ks an Th .? A Q

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

Add a comment

Related presentations

Related pages

Full text of "A course of study for the secondary schools ...

Full text of "A course of study for the secondary schools of Montana" See other formats ...
Read more

Full text of "Byte Magazine Volume 06 Number 06 ...

Search the history of over 469 billion pages on the Internet. search Search the Wayback Machine
Read more

43531895 J Allen Hynek the Hynek UFO Report 1977

D r J.A len Hyne i Prof s of . l k s esor A sr t onom y atN prhwesc n U ni r iy i t tr ve st n . t eUntd S ae.Hei as V a o t e h ie tts s lo d f h Centef U ...
Read more

American Horror Film (1604734531) - Documents

Share American Horror Film (1604734531)
Read more

Basics of Social Research - Qualitative and Quantitative ...

Academia.edu is a platform for academics to share research papers.
Read more

335-Reseña Geologia Sureste

Geologia de Mexico de la region sureste. by felipe_mitre
Read more

The Research Manual-Hatch&Larazaton 1991 - Scribd

The. Research Design and Statistics for Applied Linguistics THE RESEARCH MANUAL Design and Statistics for Applied Linguistics Evelyn Hatch and ...
Read more

Mark Lutz - Programming Python, Fourth Edition - 2010 ...

Academia.edu is a platform for academics to share research papers.
Read more