If you are interested in developing internal apps for your business or have a great idea for a commercial app for the App Store but you are not quite sure about where to get started of what is involved. Our half day seminar covered the following areas: how to get started with app development, where to get resources as well as offering a ‘taster’ module from our 5 day iOS development course

1. Minimum Skills
Tuesday, 20 March 12

2. Minimum Skills iPhone SDK
Tuesday, 20 March 12

3. Minimum Skills
• C, Objective C
• Foundation Classes
• UIKit
• Interface Builder
Tuesday, 20 March 12

4. iOS SDK Layers
Tuesday, 20 March 12

5. iOS SDK Layers iPhone SDK
Tuesday, 20 March 12

6. What is iPhone SDK?
Layered libraries and frameworks
Development tools
Documentation
Tuesday, 20 March 12

7. iPhone SDK
Cocoa Touch
Media
Core Services
Core OS
Tuesday, 20 March 12

8. iPhone SDK
Cocoa Touch
Media
Core Services
Core OS
Tuesday, 20 March 12

9. Core Services Layer
Foundation Framework Objective-C wrappers for Core Foundation
Core Foundation C Library Strings, dates, collections, threads, etc.
Core Location Framework Accessing geospatial positioning info
Core Data Framework Persistence, object-relational mapping
Address Book Framework Managing contact info
SQLite C Library Accessing lightweight SQL database
XML Support ObjC Class NSXMLParser class and libXML2 library
Store Kit Framework In app purchasing
Tuesday, 20 March 12

10. iPhone SDK
Cocoa Touch
Media
Core Services
Core OS
Tuesday, 20 March 12

11. iPhone SDK
Cocoa Touch
Media
Core Services
Core OS
Tuesday, 20 March 12

12. Media
Core Animation
Open GL ES
Core Graphics
Core Audio
Tuesday, 20 March 12

13. iPhone SDK
Cocoa Touch
Media
Core Services
Core OS
Tuesday, 20 March 12

14. iPhone SDK
Cocoa Touch
Media
Core Services
Core OS
Tuesday, 20 March 12

15. Cocoa touch
AddressBookUI
MessageUI
MapKit
UIKit
Tuesday, 20 March 12

16. UIKit
• Application management and integration (via URL schemes)
• Graphics and windowing
• Handling touch events
• User interface views and controls
• Text handling
• Web content
• Device-specific features (accelerometer, camera, photo
library)
Tuesday, 20 March 12

17. iOS SDK Tools
Tuesday, 20 March 12

18. iOS SDK Tools iPhone SDK
Tuesday, 20 March 12

19. XCode
• IDE for iPhone Projects
• Build
• Run (Simulator, device)
• Debug
• Source code
management (SCM)
• Documentation
Tuesday, 20 March 12

20. Interface Builder
• Was a separate application
• Now integrated with Xcode
• GUI design tool
• Doesn't generate code
• Works with ‘Freeze-dried’ objects
• Archived in .xib files
• Dynamically loaded
• Objects deserialized at load
time
Tuesday, 20 March 12

21. Instruments
• Garage Band-style interface
• Performance monitoring
• Recording trace data
• CPU Sampler
• File Activity
• Object Allocations
• Leaks
Tuesday, 20 March 12

22. iOS Simulator
• Simulate iPhone/iPad
• Set the OS Version
• Simulate some hardware features
• Rotate, shake, some gestures
• Network aware
• Home / Lock
• ~/Library/Application Support/iPhone Simulator
Tuesday, 20 March 12

23. Anatomy of an Application
Tuesday, 20 March 12

24. Anatomy of an Application iPhone SDK
Tuesday, 20 March 12

25. Anatomy of an Application
• Applications are executed from within a sandbox on the
iPhone
• A Sandbox is a restricted environment
• Prevents applications from accessing unauthorised
resources.
• Prevents read/write operations outside your applications
home folder
• Everything your application needs must be self
contained.
Tuesday, 20 March 12

26. Applications home directory
Tuesday, 20 March 12

27. Applications home directory
• Documents
• User created Docs
• Not shared with any other application
• Library
• Application may store preferences
• Other resources
• Has a default Preferences folder
• MyApp.app
• Actual application
• Directory containing executable and other resources
Tuesday, 20 March 12

28. Anatomy of an Application
• Compiled Code
• Your code
• Frameworks
• Nib files
• UI elements and other objects
• Details about object relationships
• Resources
• Images, Sounds, strings etc
Tuesday, 20 March 12

29. La
un
ch
ap
p
Tuesday, 20 March 12
A
pp
in
it
Lo
ad
m
ai
n
ni
b
W
ai
tf
Application Lifecycle
or
ev
en
t
H
an
dle
ev
en
t
Ex
it
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30. iPhone Application Skeleton
main() main.m
Application MyAppDelegate.h
Delegate MyAppDelegate.m
Tuesday, 20 March 12

31. iPhone Application Skeleton
main() main.m
Application MyAppDelegate.h
Delegate MyAppDelegate.m
MyViewController.h
View
MyViewController.m
Controller MyViewController.xib
Tuesday, 20 March 12

32. Model, View, Controller
Controller
Logic
Model View
Data Presentation /
interaction
Tuesday, 20 March 12

33. Model
• Manages the app data and state
• Not concerned with UI or presentation
• Often persists somewhere
• Same model should be reusable, unchanged in different
interfaces
Tuesday, 20 March 12

34. View
• Present the model to the user in an appropriate interface
• Allows user to manipulate data
• Does not store any data
• Except to cache state
• Easily reusable & configurable to display different data
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35. Controller
• Intermediary between Model & View
• Updates the view when the model changes
• Updates the model when the user manipulates the view
• Typically where the app logic lives
Tuesday, 20 March 12

36. Model, View, Controller
Controller
Model View
Tuesday, 20 March 12

37. UIView
• Rectangular region of the screen
• Responsibilities
• Drawing
• Animation
• Responding to Events (touches etc)
• Parent to other views
• Can group other views/objects
Tuesday, 20 March 12

38. UIView
Tuesday, 20 March 12

39. View Coordinate System
• Origin in upper left corner
• y-axis grows downwards
0,0
+x
+y
Tuesday, 20 March 12

40. Screen Sizes
iPhone
iPhone 3G/3GS iPhone 4/4S iPad 1/2 New iPad
480 x 320 960 x 640 1024 x 768 2047 x 1536
Tuesday, 20 March 12

41. App - Icons
Size File Name Used For
512 x 512 iTunesArtwork Ad Hoc iTunes
57 x 57 Icon.png Home screen on iPhone/iPod
114 x 114 Icon@2x.png Home screen for iPhone 4
72 x 72 Icon-72.png Home screen for iPad
144 x 144 Icon-72@2x.png Home screen for iPad 3
29 x 29 Icon-Small.png Spotlight and Settings
50 x 50 Icon-Small-50.png Spotlight for iPad compatibility
58 x 58 Icon-Small@2x.png Spotlight and Settings for iPhone 4
Tuesday, 20 March 12

42. Xcode: Workspace
Tuesday, 20 March 12

43. Xcode: Workspace
Navigator
area
Tuesday, 20 March 12

44. Xcode: Workspace
Navigator Editor area
area
Tuesday, 20 March 12

45. Xcode: Workspace
Navigator Editor area Utility area
area
Tuesday, 20 March 12

46. Xcode: Workspace
Navigator Editor area Utility area
area
Library
area
Tuesday, 20 March 12

47. Xcode: Workspace
Navigator Editor area Utility area
area
Library
area
Debugger
area
Tuesday, 20 March 12

48. Xcode: Workspace
Tuesday, 20 March 12

49. Xcode: Workspace
Navigator
selector bar
Tuesday, 20 March 12

50. Xcode: Workspace
Navigator
Jump Bars
selector bar
Tuesday, 20 March 12

51. Xcode: Workspace
Navigator
Jump Bars
selector bar
Inspector
Selector
bar
Tuesday, 20 March 12

52. Xcode: Workspace
Navigator
Jump Bars
selector bar
Inspector
Selector
bar
Library
Selector
bar
Tuesday, 20 March 12

53. Xcode: Workspace
Navigator
Jump Bars
selector bar
Inspector
Selector
bar
Library
Selector
bar
Filter bar
Tuesday, 20 March 12

54. Xcode - Toolbars
Toolbar
Standard Editor
Assistant Editor
Version Editor
Hide/Show Navigator
Hide/Show Debug
Hide/Show Utilities
Tuesday, 20 March 12

55. Xcode - Toolbars
Navigators
List of files, symbols, search, issues, debug, breakpoint, logs
Jump Bar
Jump to any location in your project
Toolbar
Standard Editor
Assistant Editor
Version Editor
Hide/Show Navigator
Hide/Show Debug
Hide/Show Utilities
Tuesday, 20 March 12

56. Xcode - Interface Builder
Connections
Size Inspector
Attributes
Identity Inspector
Quick Help
File Inspector
Dock
Tuesday, 20 March 12

57. Xcode - Interface Builder
Media
Objects
Code Snippet
File Templates
Tuesday, 20 March 12

58. Create an Xcode Project
• Menu: File > New
Project…
• Xcode displays project
template browser
• Select iOS / Application
• Various iPhone templates
• Click Next…
Tuesday, 20 March 12

59. Basic UI & Interaction
Tuesday, 20 March 12

60. Basic UI & Interaction iPhone SDK
Tuesday, 20 March 12

61. UIControls
User interface classes
• Subclass of UIView
• Numerous built-in controls
• Generates events
• Touch up/down
• Drag event/exit
• value changed
• Invokes actions upon events
Tuesday, 20 March 12

62. Target Action
View
Controller
Tuesday, 20 March 12

63. Target Action
View
Controller
Tuesday, 20 March 12

64. Target Action
- (IBAction)buttonPressed View
Controller
Tuesday, 20 March 12

65. Target Action
- (IB
Out
let)
Upd
ate
my
Tex
t
- (IBAction)buttonPressed View
Controller
Tuesday, 20 March 12

66. Target Action
- (IB
Out
let)
Upd
ate
my
Tex
t
- (IBAction)buttonPressed View
Controller
Tuesday, 20 March 12

67. Events
• View objects that allows users to initiate some type of action
• Respond to variety of events
• Touch events
• touchDown,touchDragged, touchUp(inside, outside)
• Value changed
• Editing events
• editing began, editing changed, editing ended
Tuesday, 20 March 12

68. Interface Builder Tags
• IBActions
• Associate methods (code) to actions in the UI
• Run some code when button press etc
• IBOutlets
• Associate properties in code with objects in UI
• Get or set a value of a UI object
• Set/Get value of a switch
• Set a view’s hidden propertie
Tuesday, 20 March 12

69. Target Action
View
Controller
Tuesday, 20 March 12

70. Target Action
View
Controller
Tuesday, 20 March 12

71. Target Action
- (IBAction)buttonPressed View
Controller
Tuesday, 20 March 12

72. Target Action
- (IB
Out
let)
Upd
ate
my
Tex
t
- (IBAction)buttonPressed View
Controller
Tuesday, 20 March 12

73. Target Action
- (IB
Out
let)
Upd
ate
my
Tex
t
- (IBAction)buttonPressed View
Controller
Tuesday, 20 March 12

74. Files
• Header file contains declarations
• variables, methods etc
• Method file implementation
• Your code goes here
• Xib file
• The user interface goes here
Tuesday, 20 March 12

75. Linking in Interface Builder
Files Owner
Tuesday, 20 March 12

76. Linking in Interface Builder
Files Owner
Tuesday, 20 March 12

77. Linking in Interface Builder
Files Owner
Tuesday, 20 March 12

78. Demo and Exercise
Tuesday, 20 March 12

79. Demo and Exercise iPhone SDK
Tuesday, 20 March 12