iPhone Development

1. iPhone Development 박종화 suakii@gmail.com

2. Contents • Requirements • iOS SDK • iOSOverView • Objective-C • Design Pattern • App Dev Cycle • QA

3. Trend

4. Smartphone OS

5. Smartphone OS

6. Why?

7. Differences • Only One Running Application • Only One Window • Limited Access • Limited Response Time • Limited Screen Size • Limited System Resources • No Garbage Collection

8. Requirements

9. Requirements • Intel Based Snow Leopard • iPhone or iPod Touch • Xcode • iOSSDK • Objected Oriented Concepts

10. Hardware

11. Hardware

12. Hardware

13. Hardware

14. Software

15. Developer Programs • iOS Developer – Individual ($99/year) • iOSDeveloper – Enterprise ($299/year) • iOS Developer – Student ($0)

16. iPhone Platform • ARM Processor(Samsung, Apple) • 512MB RAM (iPhone4) • BSD UNIX • Mach kernel • COCOA APIs

17. iOS SDK

18. SDK Tools • Frameworks • Xcode Tools • iPhone Simulator • iPhone Reference Library

19. Frameworks • Apple delivers most of its system interfaces in special packages called frameworks. • A framework is a directory that contains a dynamic shared library and the resources need to support that library

20. Frameworks

21. Xcode Tools Xcode Interface Builder Instruments

22. Xcode

23. Interface Builder

24. Instruments

25. Xcode Tools • GCC compiler 4.2 • Support for Obj-C, C++, Java, Python and Ruby (iPhone only uses Obj-C & C++) • Code editor with code completion • Support for SVN and CVS

26. Interface Builder • Tool for laying out interfaces • Separate Tool from Xcode • Bind Actions and Outlets in Controllers

27. Simulator

28. Simulator

29. Simulator

30. iOS OverView

31. iOS 4.1 • Multitasking • Folders • Threaded email • iBooks • Game Center • Not support Flash or Java

32. iOS Core Services Cocoa Touch Core OS Media

33. iOS Core Services Cocoa Touch Core OS Media

34. iOS Core Services Cocoa Touch Core OS Media

35. iOS Core Services Cocoa Touch Core OS Media

36. Application Life Cycle

37. Event-Handling

38. Interruptions

39. Main.m #import <UIKit/UIKit.h> int main(intargc, char *argv[]) { NSAutoreleasePool *pool = [[NSAutoreleasePoolalloc] init]; intretVal = UIApplicationMain(argc, argv, nil, nil); [pool release]; return retVal; }

40. Performance • Do Not Block the Main Thread • Use Memory Efficiently • Floating-Point Math Considerations • Reduce Power Consumption • Tune Your Code • Improve File Access Times • Tune Your Networking Code

41. Objective-C

42. OO Terms • Class • Instance • Message • Method • Instance Variable • Inheritance • Superclass/Subclass • Protocol

43. History

44. Objective-C • Somewhere in-between C++ and Java • Created by Brad Cox & Tom Love • Invented in 1980’s for Next Computing • Based on C with SmallTalk like extentions • Used in COCOA, OpenStep and GNUStep • Class based OO language

45. Objective-C • 객체를 중심으로 작성 • 객체는 데이터와 데이터를 조작하는 동작으로 이루어진다. • 동작을 객체의 method, 객체의 데이터를 instance variable • Objective-C는 동적인 언어로서 실행시에 객체나 매소드가 변할 수 있다.

46. Class Interface #import <UIKit/Uikit.h> @interface HelloWorldViewController : UIViewController { //Instance Variable UIButton button; UILabel *label; } //property @property (nonautomatic, retain) IBOutletUILabel *label; //method -(IBAction)sayHello:(id)sender; @end

47. Class Implementation • #import “HelloWorldViewController.h” • @implementation HelloWorldViewController • @synthesize label; • -(IBAction) sayHello:(id) sender { • label.text = @”Hello, World”; • } • -(void)viewDidLoad { • } • (void)dealloc { [label release]; • [super dealloc]; • } • @end

48. Class Allocation • HelloWorldViewController *obj = [[HelloWorldViewControlleralloc] init];

49. Property • 인스턴스 변수에 대한 접근자메소드의 구현의 편리 label - getter setLabel: - setter • @synthesize • Dot Syntax label.text = @”Hello, World”; [label setText:@”Hello, World”];

50. Properties • Readonly • Retain • Readwrite • Copy • Assign