Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Objective-C Introduction part1
Search
Juan Pablo Ortiz Aréchiga
March 24, 2012
Programming
5
170
Objective-C Introduction part1
An extended -barely- version of the Objective-C introduction at CocoaHeadsGDL.
Juan Pablo Ortiz Aréchiga
March 24, 2012
Tweet
Share
More Decks by Juan Pablo Ortiz Aréchiga
See All by Juan Pablo Ortiz Aréchiga
Introduction to programming
pablasso
1
74
Objective-C Introduction part2
pablasso
3
140
Objective-C at CocoaHeadsGDL
pablasso
1
120
Other Decks in Programming
See All in Programming
為你自己學 Python - 冷知識篇
eddie
1
350
プロパティベーステストによるUIテスト: LLMによるプロパティ定義生成でエッジケースを捉える
tetta_pdnt
0
4.3k
Performance for Conversion! 分散トレーシングでボトルネックを 特定せよ
inetand
0
3.4k
Laravel Boost 超入門
fire_arlo
3
220
Compose Multiplatform × AI で作る、次世代アプリ開発支援ツールの設計と実装
thagikura
0
170
AWS発のAIエディタKiroを使ってみた
iriikeita
1
190
JSONataを使ってみよう Step Functionsが楽しくなる実践テクニック #devio2025
dafujii
1
640
1から理解するWeb Push
dora1998
7
1.9k
Android 16 × Jetpack Composeで縦書きテキストエディタを作ろう / Vertical Text Editor with Compose on Android 16
cc4966
2
270
Amazon RDS 向けに提供されている MCP Server と仕組みを調べてみた/jawsug-okayama-2025-aurora-mcp
takahashiikki
1
120
Zendeskのチケットを Amazon Bedrockで 解析した
ryokosuge
3
320
Kiroで始めるAI-DLC
kaonash
2
630
Featured
See All Featured
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
4k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
131
19k
The Power of CSS Pseudo Elements
geoffreycrofte
77
6k
Navigating Team Friction
lara
189
15k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
139
34k
Making Projects Easy
brettharned
117
6.4k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
113
20k
GitHub's CSS Performance
jonrohan
1032
460k
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
358
30k
How to train your dragon (web standard)
notwaldorf
96
6.2k
Raft: Consensus for Rubyists
vanstee
140
7.1k
Become a Pro
speakerdeck
PRO
29
5.5k
Transcript
Objective-C intro viernes 23 de marzo de 12
History • Born in the 80’s by Brad Cox and
Tom Love • A C’s pre-processor • C + Smalltalk = Obj-C • Not really popular viernes 23 de marzo de 12
NeXT! viernes 23 de marzo de 12
• NeXT was a failure on hardware, but success on
building tools • GNU cloned the compiler in the 90s • Apple buys NeXT, relies Objective-C and NeXT tools viernes 23 de marzo de 12
Objective-C • Bunch of C extensions • You can write
plain C without problems • Interfaces (.h) and implementations (.m) viernes 23 de marzo de 12
Objective-C • Dynamic typing (id) viernes 23 de marzo de
12
Method syntax viernes 23 de marzo de 12
In Objective-C style: viernes 23 de marzo de 12
multiparameters viernes 23 de marzo de 12
Accessors the properties way the manual way viernes 23 de
marzo de 12
Properties instead of this.. viernes 23 de marzo de 12
Properties .. this setters/getters are created for you viernes 23
de marzo de 12
Properties set synthesize on the implementation avoids clutter viernes 23
de marzo de 12
Properties • nonatomic • atomic • retain • copy •
assign viernes 23 de marzo de 12
Memory management • It’s all up to you * viernes
23 de marzo de 12
Memory management reference counting viernes 23 de marzo de 12
Creating objects or autorelease Everytime you use init or retain,
it’s your responsability to release viernes 23 de marzo de 12
Memory management viernes 23 de marzo de 12
Interface 1 2 3 viernes 23 de marzo de 12
Implementation setters viernes 23 de marzo de 12
Implementation setters viernes 23 de marzo de 12
Implementation viernes 23 de marzo de 12
3 ways to handle memory • Manual reference counting •
Garbage collector* (only on Mac) • ARC viernes 23 de marzo de 12
ARC viernes 23 de marzo de 12
ARC • Memory Management? that’s so 2011 • Automatic Reference
Counting • Xcode 4.2+ • Compatible with iOS 4.x* and iOS 5.x viernes 23 de marzo de 12
Properties + ARC • atomic • nonatomic • weak •
strong viernes 23 de marzo de 12
Debug with NSLog same rules as printf() viernes 23 de
marzo de 12
nil every message sent to nil will be ignored, the
app won’t crash viernes 23 de marzo de 12
Categories add methods to an existing class without subclassing viernes
23 de marzo de 12
Categories Once imported, the category can be used on any
NSString viernes 23 de marzo de 12
Protocols • Declare methods that others are expected to implement
viernes 23 de marzo de 12
Delegate Pattern • Handing a task to another part of
the program. • i.e. a TableView may notify it’s delegate when a single row was tapped so the program can take an action. viernes 23 de marzo de 12
Coding Standards viernes 23 de marzo de 12
Coding Standards viernes 23 de marzo de 12
Coding Standards viernes 23 de marzo de 12