Overview of what app development for the iPhone OS means for newbies.

1. iPhone OS Apps Development
the basics (again)

2. Smartphone Sales 09 - 172m
Competitive Landscape: Mobile Devices
Worldwide, 4Q09 and 2009, Gartner

3. Smartphone Sales 09 - 172m
Symbian 80,878 47%
RIM 34,346 20%
iPhone OS 24,889 14%
Windows Mobile 15,027 9%
Linux 8,126 5%
Android 6,798 4%
Others 1,305 1%
Competitive Landscape: Mobile Devices
Worldwide, 4Q09 and 2009, Gartner

5. 140,000 Apps
58m Users 28,000 Developers
4.8 apps downloaded per user (dec)
since july 08
$4.37 per user per month
280m apps downloaded (dec 09)
3,000,000,000+ dls

10. What Developers Need to Know

11. Device/Platform
Limitations

12. Device/Platform
Limitations
One App at a Time

13. Device/Platform
Limitations
One App at a Time
One Screen at a Time

14. Device/Platform
Limitations
One App at a Time
One Screen at a Time
Limited Access

15. Device/Platform
Limitations
One App at a Time
One Screen at a Time
Limited Access
Limited Memory (128/256MB)

16. Device/Platform
Limitations
One App at a Time
One Screen at a Time
Limited Access
Limited Memory (128/256MB)
Compact Screen Size

17. Device/Platform
Limitations
One App at a Time
One Screen at a Time
Limited Access
Limited Memory (128/256MB)
Compact Screen Size
Limited Control

20. Metaphors
model your application’s objects
and actions on objects and
actions in the real world

22. Aesthetic
Integrity
A measure of how well the
appearance of your application
integrates with its functions

24. Focus on Primary Task

25. Focus on Primary Task
Make it Obvious

26. Focus on Primary Task
Make it Obvious
Minimize Input

27. Focus on Primary Task
Make it Obvious
Minimize Input
Minimize Choices

28. Focus on Primary Task
Make it Obvious
Minimize Input
Minimize Choices
Immediate Feedback

30. iPhone OS & SDK

31. iPhone OS & SDK

32. iPhone OS & SDK
A Stack of Frameworks, High to Low

33. iPhone OS & SDK

34. iPhone OS & SDK
UIKit Address Book UI
copy & paste, UI controls, touch & motion
handling, graphics & windowing, app
management, foundation, accelerometers
stats, camera control, photo library, Push Notifications
sensors stats...
Game Kit Message UI
Map Kit

35. iPhone OS & SDK

36. iPhone OS & SDK
Quartz (2d vector) Core Audio
Core Animation OpenAL
OpenGL ES Media Player Framework

37. iPhone OS & SDK

38. iPhone OS & SDK
Core Data Store Kit
Core Foundation SQLite
Core Location XML Support

39. iPhone OS & SDK

40. iPhone OS & SDK
CFNetwork
Accessory Support
Security
Threading
File Access
Memory Management

41. UI components and Frameworks
Navigation/Tool Bars,
Tab Bars, iPod library
Network Connectivity

42. UI components and Frameworks
TableViews, Core Data, sqlite

43. UI components and Frameworks
Text Views, Emails,
Mapkit, GPS
Network Connectivity

44. Rolling your own UI components?

46. The SDK

47. Xcode

48. Xcode

49. Xcode

50. Interface Builder

51. Instruments & Shark

52. Instruments & Shark

53. Objective-C
Founded in 86, licensed by NeXT in 88
Superset of C with OO features
Polymorphism, inheritance, class, interface

55. send messages to object instances to call a method
Properties and Synthesize

56. Memory Management
Cocoa relies on reference counting
No automatic Garbage Collection on iPhone OS

57. First App

58. First App
A UIWindow with a UILabel, without Interface Builder

59. First App
A UIWindow with a UILabel, without Interface Builder

60. First App
A UIWindow with a UILabel, without Interface Builder

61. First App
Fire up Xcode

62. First App
Initiates your app in the App Delegate class

63. AppDelegate.m

64. AppDelegate.m
“Don’t Call Me,
I’ll Call You.”
the iPhone OS is in
control of our app

65. Second App

66. Second App
A UIWindow with two UIImages: one local, one web

67. Second App
A UIWindow with two UIImages: one local, one web

68. Demo

69. Second App
A UIWindow with two UIImages: one local, one web

70. Second App
Same gig, different acts

71. Third App

72. Third App
Introducing ViewControllers and Animation

73. Third App
Orientation Changes + Motion Detection + Animation

74. Demo

75. Third App
Orientation Changes + Motion Detection + Animation

76. Third App
App Delegate class made simple

77. Third App
Display logic in View Controller class

78. Third App
Handling Orientation Changes in View Controller class

79. Third App
Shuffle Images upon Shake in View Controller class

80. Fourth App: a simple game
UIButtons + NSTimer + Animation

81. Count Up Timer
Life Meter
Player
Guard
Buttons

82. Demo

83. Count Up Timer
Life Meter
Player
Guard
Buttons

84. Life Meter GameAppDelegate Player
(void)applicationDidFinishLaunching: (UIApp*)app
LifeMeter Convict : UIImageView
UILabel *lifeLabel; NSInteger horizontalPosition;
UIImageView *life1SymbolImageView; UIImage *convictImage;
UIImageView *life2SymbolImageView; BOOL isBeingHit;
UIImageView *life3SymbolImageView; NSTimer *paralyzedTimer;
UIImageView *life4SymbolImageView; - (void) startCrawling;
UIImageView *life5SymbolImageView; - (void) gotHit;
NSInteger numberOfLivesLeft; - (void) goDie;
- (id) initWithFrame:(CGRect)aRect;
- (void) reduceLifeMeterByOne; - (void) recoveredFromHit:(NSString *)animationID
- (void) reduceLifeMeterByOneAnimationDone: finished:(NSNumber *) finished context:(void *)
(NSString *)animationID finished:(NSNumber *) context;
finished context:(void *) context;
GameViewController
UIImageView *bottomPanel
UIButton *firstButton
UIButton *secondButton
UIButton *thirdButton
Convict *convict
Guard *guard Buttons
LifeMeter *lifeMeter
Guard TimerClock *timerClockView
- (void) initControls
- (void) initConvict
Guard TimerClock
- (void) initGuard UILabel *clockLabel
UIImage *guardImage
NSDate* currentDate
UIImageView *nozzleFireImageView
CGFloat secondsElapsed
UILabel *nowLoadingLabel NSTimer *updateLabelTimer
BOOL gunIsAiming -(void)updateLabel: (NSTimer*) updateLabelTimer
BOOL gunIsFiring -(void)stopTimer;
BOOL isFinalShot
NSTimer *startsAimingTimer
NSTimer *startsReloadingTimer
CFURLRef soundFileURLRef
SystemSoundID soundFileObject
Count Up Timer
- (id) init;
- (void) startsAiming;
- (void) startsReloading;
- (void) startsFiring;
- (void) finalShot;
- (void) restNow;
- (void) firingStopped:(NSString *)animationID
finished:(NSNumber *) finished context:(void *)
context;

85. GameViewController Guard
UIImage *guardImage
UIImageView *bottomPanel UIImageView *nozzleFireImageView
UIButton *firstButton UILabel *nowLoadingLabel
UIButton *secondButton BOOL gunIsAiming
BOOL gunIsFiring
UIButton *thirdButton
BOOL isFinalShot
Convict *convict NSTimer *startsAimingTimer
Guard *guard NSTimer *startsReloadingTimer
LifeMeter *lifeMeter CFURLRef soundFileURLRef
SystemSoundID soundFileObject
TimerClock *timerClockView - (id) init;
- (void) initControls - (void) startsAiming;
- (void) initConvict - (void) startsReloading;
- (void) initGuard - (void) startsFiring;
- (void) finalShot;
- (void) restNow;
- (void) firingStopped:(NSString *)animationID
finished:(NSNumber *) finished context:(void *)
context;

86. GameViewController Guard
UIImage *guardImage
UIImageView *bottomPanel UIImageView *nozzleFireImageView
UIButton *firstButton UILabel *nowLoadingLabel
UIButton *secondButton BOOL gunIsAiming
BOOL gunIsFiring
UIButton *thirdButton
BOOL isFinalShot
Convict *convict NSTimer *startsAimingTimer
Guard *guard NSTimer *startsReloadingTimer
LifeMeter *lifeMeter CFURLRef soundFileURLRef
SystemSoundID soundFileObject
TimerClock *timerClockView - (id) init;
- (void) initControls - (void) startsAiming;
- (void) initConvict - (void) startsReloading;
- (void) initGuard - (void) startsFiring;
- (void) finalShot;
- (void) restNow;
- (void) firingStopped:(NSString *)animationID
finished:(NSNumber *) finished context:(void *)
context;

87. GameViewController Guard
UIImage *guardImage
UIImageView *bottomPanel UIImageView *nozzleFireImageView
UIButton *firstButton UILabel *nowLoadingLabel
UIButton *secondButton BOOL gunIsAiming
BOOL gunIsFiring
UIButton *thirdButton
BOOL isFinalShot
Convict *convict NSTimer *startsAimingTimer
Guard *guard NSTimer *startsReloadingTimer
LifeMeter *lifeMeter CFURLRef soundFileURLRef
SystemSoundID soundFileObject
TimerClock *timerClockView - (id) init;
- (void) initControls - (void) startsAiming;
- (void) initConvict - (void) startsReloading;
- (void) initGuard - (void) startsFiring;
- (void) finalShot;
- (void) restNow;
- (void) firingStopped:(NSString *)animationID
finished:(NSNumber *) finished context:(void *)
context;

88. GameViewController Convict : UIImageView
UIImageView *bottomPanel NSInteger horizontalPosition;
UIButton *firstButton UIImage *convictImage;
UIButton *secondButton BOOL isBeingHit;
UIButton *thirdButton NSTimer *paralyzedTimer;
Convict *convict - (void) startCrawling;
Guard *guard - (void) gotHit;
LifeMeter *lifeMeter - (void) goDie;
TimerClock *timerClockView - (id) initWithFrame:(CGRect)aRect;
- (void) initControls - (void) recoveredFromHit:(NSString *)animationID
- (void) initConvict finished:(NSNumber *) finished context:(void *)
- (void) initGuard context;

89. Guard
UIImage *guardImage
UIImageView *nozzleFireImageView
UILabel *nowLoadingLabel
BOOL gunIsAiming
BOOL gunIsFiring
BOOL isFinalShot
NSTimer *startsAimingTimer
NSTimer *startsReloadingTimer
CFURLRef soundFileURLRef
SystemSoundID soundFileObject
- (id) init;
- (void) startsAiming;
- (void) startsReloading;
- (void) startsFiring;
- (void) finalShot;
- (void) restNow;
- (void) firingStopped:(NSString *)animationID
finished:(NSNumber *) finished context:(void *)
context;

90. Closing Thoughts...

91. questions?