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Andri Yadi
President, ID-ObjC | CEO, DyCode
@andri_yadi | a (at) dycode (dot) com
http://andriyadi.me
Introduction to iOS Development
O ine Class Jasakomer (Special iOS), April 15, 2012
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about me
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The rst & largest iOS & OSX
developer community in Indonesia
ID-ObjectiveC
President
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4 years in a row
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2011 - now
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start a company & code for food
9 years in mobile development
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a movie freak
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iOS Devices
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21
Start developing iOS apps Today!
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http://developer.apple.com/ios
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Xcode iOS Simulator iOS Developer Library
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Required Stu s
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Latest iOS SDK
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27
Installing Tools
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Optional Stu s
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Actual iOS devices
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For debugging to device & deployment to AppStore
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Some development stuffs
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Objective-C
C + OOP ≠ C++
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A superset of C:
• Syntactical convention for de ning
classes & method
• Syntax for method invocation
• Syntax for declaring & synthesizing
properties
• Static & dynamic typing
• Blocks
• Extension: protocol & categories
Objective-C Advantages:
• Dynamic typing:
enables to determine the class of an object
at runtime
• Dynamic binding:
allows to determine the method to call at
runtime instead of at compile-time
• Dynamic loading:
allows to add modules of code & other
resources at runtime.
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Classes & Objects
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Methods & Messaging
[aMutableArray insertObject:anObject atIndex:0];
[[self aMutableArray] insertObject:anObject atIndex:0];
[self.aMutableArray insertObject:anObject atIndex:0];
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Blocks
int result = myBlock(4);
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Protocols & Categories
@interface NowPlayingController :
UIViewController {
}
@end
Protocol == Interface in other OOP language (Java, C#)
@protocol ProfileViewDelegate
- (void)profileView:(ProfileView *)profileView doSignInWith:
(AuthProviderType)signInType sender:(id)sender;
@optional
- (void)profileView:(ProfileView *)profileView doSignOut:(id)sender;
@end
Category, enables to extend a class without subclassing it
@interface NSDate (Additions)
+ (NSDate *)dateFromTimeString:(NSString*)timeString;
+ (NSDate *)dateWithJSONString:(NSString *)json;
- (NSDate *)dateByAddingDays:(NSInteger)numDays;
- (NSDate *)dateByAddingHours:(NSInteger)numHours;
@end
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More details:
http://bit.ly/AF8EiJ
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Design Pattern
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Model-View-Controller design pattern
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Model-View-Controller design pattern
NowPlayingController
NowPlayingView
NowPlaying
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Reference counting
No garbage collector support (yet)
Autorelease Pool
Memory Management
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iOS frameworks
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Enable apps to store user documents
and key value data
Storage
Push changes to all user’s computers
and devices
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Easily integrate Tweet Sheet
Access system-wide Twitter account
from within app
Wrap OAuth request & response
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Memory management becomes
compiler’s job
Manually enabled in Xcode
It’s NOT a garbage collector!
Automatic Reference
Counting (ARC)
No need to deal with retain & release
by yourself
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Layout the app’s work ow & design
user interfaces
Can be loaded dynamically
Storyboard
Specify transitions & segues between
views
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Image processing framework nally
comes to iOS
Advanced features: red-eye reduction,
face recognition
CoreImage
Provides built-in lters: color e ect,
distortions, transitions
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Take advantage of the latest hardware
Apple-developed OpenGL ES extensions
GLKit: new high-level framework
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Cocoa Touch
Foundation, UIKit, Multi-Touch Gestures
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Graphics
Core Graphics, Core Animation, Core Image, Core Text, OpenGL ES
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CoreData
Database, Object-Relational Mapping, optimized for mobile - > 1 million objects store
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Audio & Video
Media player, Core Audio & OpenAL, iPod library, HTTP Live Streaming
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Networking
Bonjour, Peer to peer, WebKit framework, BSD socket
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Core Location & MapKit
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Multitasking
New kind of multitasking
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External display support
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AirPrint
Wireless printing to AirPrint-enabled printers. Hack available
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Push & Local Notification
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Game Center
Social gaming platform
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iAd
Integrated advertising platform
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In-App Purchase
Payment inside applications
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Human Interface Design
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GUI Elements
http://www.teehanlax.com/downloads/iOS_5_GUI_iPhone4S.psd.zip
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Storyboard
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The app will look like these
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App Store Submission
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Finally, on the App Store
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you app can use this badge!
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Everything is here: http://developer.apple.com/ios
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https://developer.apple.com/library/ios/#referencelibrary/
GettingStarted/RoadMapiOS/Introduction/Introduction.html
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Let’s see some code
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DYCODE IS HIRING!
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If you think you’re
awesome, either mobile
developer guru or still
early learner, send your
awesome CV to:
[email protected]
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