Presentation that Bob McCune and I did for the DevJam Jam Session night on April 7, 2010.

1. iPhone OS
The Next
Killer
Platform

2. Why all the excitement?

3. Why all the excitement?
• Compelling, stylish products built on multi-
touch interface
• iPod Touch
• iPhone
• iPad

4. Why all the excitement?
• Compelling, stylish products built on multi-
touch interface
• iPod Touch
• iPhone
• iPad
• Applications marketplace (AppStore)

5. Why all the excitement?
• Compelling, stylish products built on multi-
touch interface
• iPod Touch
• iPhone
• iPad
• Applications marketplace (AppStore)
• Developer tools and community

6. iPhone Strengths

7. iPhone Strengths
• iPhone OS as a platform

8. iPhone Strengths
• iPhone OS as a platform
• Complete hardware and software product
offering
• Apple A4 chip design

9. iPhone Strengths
• iPhone OS as a platform
• Complete hardware and software product
offering
• Apple A4 chip design
• Thriving development community

10. iPhone Strengths
• iPhone OS as a platform
• Complete hardware and software product
offering
• Apple A4 chip design
• Thriving development community
• Blossoming applications marketplace

11. iPhone Strengths
• iPhone OS as a platform
• Complete hardware and software product
offering
• Apple A4 chip design
• Thriving development community
• Blossoming applications marketplace
• Cult-like brand loyalty

12. iPhone Weaknesses

13. iPhone Weaknesses
• Exclusivity agreement with AT&T

14. iPhone Weaknesses
• Exclusivity agreement with AT&T
• Proprietary SDK and licensing agreements

15. iPhone Weaknesses
• Exclusivity agreement with AT&T
• Proprietary SDK and licensing agreements
• App Store app submission and approval
process

16. iPhone Opportunities

17. iPhone Opportunities
• Expansion of iPhone/iPad to multiple cellular
networks

18. iPhone Opportunities
• Expansion of iPhone/iPad to multiple cellular
networks
• Captivated development community

19. iPhone Opportunities
• Expansion of iPhone/iPad to multiple cellular
networks
• Captivated development community
• Captivated gaming community

20. iPhone Opportunities
• Expansion of iPhone/iPad to multiple cellular
networks
• Captivated development community
• Captivated gaming community
• Extensibility of the device through External
Accessory framework

21. iPhone Threats

22. iPhone Threats
• Android OS and Google

23. iPhone Threats
• Android OS and Google
• Other mobile/tablet platforms

24. iPhone Threats
• Android OS and Google
• Other mobile/tablet platforms
• User reluctance to move to a multi-touch
user interface

25. iPhone SDK

26. iPhone SDK
Key Features

27. iPhone SDK
Key Features
• Tools to design, build, test, and deploy

28. iPhone SDK
Key Features
• Tools to design, build, test, and deploy
• Powerful, full-featured APIs

29. iPhone SDK
Key Features
• Tools to design, build, test, and deploy
• Powerful, full-featured APIs
• Consistent
• Greatly aides in learning iPhone development

30. iPhone SDK
Key Features
• Tools to design, build, test, and deploy
• Powerful, full-featured APIs
• Consistent
• Greatly aides in learning iPhone development
• Leverages hardware capabilities of device

31. iPhone SDK
Key Features
• Tools to design, build, test, and deploy
• Powerful, full-featured APIs
• Consistent
• Greatly aides in learning iPhone development
• Leverages hardware capabilities of device
• Written in Objective-C
• Lower-level frameworks in standard C

32. Objective-C

33. Objective-C
The old new hotness

34. Objective-C
The old new hotness
• Strict superset of ANSI C
• Object-oriented extensions
• Additional syntax and types

35. Objective-C
The old new hotness
• Strict superset of ANSI C
• Object-oriented extensions
• Additional syntax and types
• Native iPhone SDK language

36. Objective-C
The old new hotness
• Strict superset of ANSI C
• Object-oriented extensions
• Additional syntax and types
• Native iPhone SDK language
• Flexible typing

37. Objective-C
The old new hotness
• Strict superset of ANSI C
• Object-oriented extensions
• Additional syntax and types
• Native iPhone SDK language
• Flexible typing
• Simple, expressive syntax

38. Objective-C
The old new hotness
• Strict superset of ANSI C
• Object-oriented extensions
• Additional syntax and types
• Native iPhone SDK language
• Flexible typing
• Simple, expressive syntax
• Dynamic runtime

39. Objective-C
The old new hotness
• Strict superset of ANSI C
• Object-oriented extensions
• Additional syntax and types
• Native iPhone SDK language
• Flexible typing
• Simple, expressive syntax
• Dynamic runtime
• Reference counting for memory
management

40. Objective-C Resources

41. iPhone SDK Frameworks

42. iPhone SDK Frameworks
BSD UNIX / Kernel Services

43. iPhone SDK Frameworks
Core Frameworks
BSD UNIX / Kernel Services

44. iPhone SDK Frameworks
Media
Core Frameworks
BSD UNIX / Kernel Services

45. iPhone SDK Frameworks
Cocoa Touch
Media
Core Frameworks
BSD UNIX / Kernel Services

46. Cocoa Touch
Foundation Framework

47. Cocoa Touch
Foundation Framework
• Core framework for non-UI functionality

48. Cocoa Touch
Foundation Framework
• Core framework for non-UI functionality
• Operating System Classes
• threading, archiving, filesystem

49. Cocoa Touch
Foundation Framework
• Core framework for non-UI functionality
• Operating System Classes
• threading, archiving, filesystem
• Collections
• Common collection types: arrays, sets, maps

50. Cocoa Touch
Foundation Framework
• Core framework for non-UI functionality
• Operating System Classes
• threading, archiving, filesystem
• Collections
• Common collection types: arrays, sets, maps
• Networking support

51. Cocoa Touch
Foundation Framework
• Core framework for non-UI functionality
• Operating System Classes
• threading, archiving, filesystem
• Collections
• Common collection types: arrays, sets, maps
• Networking support
• XML Processing

52. Cocoa Touch
UIKit Framework

53. Cocoa Touch
UIKit Framework
• Framework for building iPhone user interfaces

54. Cocoa Touch
UIKit Framework
• Framework for building iPhone user interfaces
• User Interface Elements
• Views, tables, buttons, images, etc.

55. Cocoa Touch
UIKit Framework
• Framework for building iPhone user interfaces
• User Interface Elements
• Views, tables, buttons, images, etc.
• View Controllers

56. Cocoa Touch
UIKit Framework
• Framework for building iPhone user interfaces
• User Interface Elements
• Views, tables, buttons, images, etc.
• View Controllers
• Multitouch Event Handling

57. Cocoa Touch
UIKit Framework
• Framework for building iPhone user interfaces
• User Interface Elements
• Views, tables, buttons, images, etc.
• View Controllers
• Multitouch Event Handling
• Accelerometer

58. Cocoa Touch
UIKit Framework
• Framework for building iPhone user interfaces
• User Interface Elements
• Views, tables, buttons, images, etc.
• View Controllers
• Multitouch Event Handling
• Accelerometer
• High-level Drawing Routines

59. iPhone SDK Tools

60. XCode

61. XCode

62. XCode
• Apple’s IDE for creating Mac and iPhone apps

63. XCode
• Apple’s IDE for creating Mac and iPhone apps
• Provides visual front end to GCC and GDB

64. XCode
• Apple’s IDE for creating Mac and iPhone apps
• Provides visual front end to GCC and GDB
• Hub of development process:
Editing Testing
Building Model Design
Refactoring Deployment
Debugging Code Signing
API Doc Integration Project Configuration

65. Interface Builder

66. Interface Builder

67. Interface Builder
• Visual user interface builder

68. Interface Builder
• Visual user interface builder
• Layout and configuration of user interface

69. Interface Builder
• Visual user interface builder
• Layout and configuration of user interface
• Visual layout guides based on Apple's HIG

70. Interface Builder
• Visual user interface builder
• Layout and configuration of user interface
• Visual layout guides based on Apple's HIG
• Graphically wire UI components

71. Interface Builder
• Visual user interface builder
• Layout and configuration of user interface
• Visual layout guides based on Apple's HIG
• Graphically wire UI components
• Seamless integration with XCode

72. iPhone Simulator

73. iPhone Simulator

74. iPhone Simulator
• Faster code, build, test cycle

75. iPhone Simulator
• Faster code, build, test cycle
• Test behaviors: rotation, shake, multi-touch

76. iPhone Simulator
• Faster code, build, test cycle
• Test behaviors: rotation, shake, multi-touch
• Easier to test exceptional conditions

77. iPhone Simulator
• Faster code, build, test cycle
• Test behaviors: rotation, shake, multi-touch
• Easier to test exceptional conditions
• iPhone Simulator != iPhone:
• No memory or CPU limits
• Not all APIs and capabilities available:
• Core Location, Keychain, etc.

78. Instruments

79. Instruments

80. Instruments
• Dynamic tracing and profiling tool

81. Instruments
• Dynamic tracing and profiling tool
• Visual front end to DTrace

82. Instruments
• Dynamic tracing and profiling tool
• Visual front end to DTrace
• Uses digital audio workstation-like interface

83. Instruments
• Dynamic tracing and profiling tool
• Visual front end to DTrace
• Uses digital audio workstation-like interface
• Large library of standard instruments
• CPU Sampler, Core Animation, Leaks, etc.
• Can build custom DTrace instruments

84. Instruments
• Dynamic tracing and profiling tool
• Visual front end to DTrace
• Uses digital audio workstation-like interface
• Large library of standard instruments
• CPU Sampler, Core Animation, Leaks, etc.
• Can build custom DTrace instruments
• Wireless profiling in iPhone SDK 3.1+

85. One more thing...