1. iPhone Development
Connecting to the cloud

2. Ninth Division
real legit growing apple platforms development
company in omaha, ne
www.ninthdivision.com
@ninthdivision
Andy Peters
@andypeters

3. Midwest Mobile
Developers
connecting all the mobile developers in the region
(Nebraska, Iowa, Kansas, Missouri)
http://groups.google.com/group/midwest-mobile-developers

4. Getting started with
iPhone Development

5. Getting started with
iPhone Development

8. flickr: kmulcahy

9. flickr: kmulcahy

11. iPhone The Cloud

12. Why?
flickr: Waldo#4

14. 30 Million
iPhone’s Sold as of Sept. 2009

16. 20 Million
iPod Touches Sold as of Sept. 2009

17. User experience.

19. Offline usage.

22. Unreliable Connectivity.

26. Social networks.

28. More devices...

29. More devices...

30. More devices...

31. More devices...

32. iPhone users use the
hell out of social apps

34. 15,604,157 Monthly Active Users
Facebook for the iPhone

35. Tweetie 2 for the iPhone

36. Be unique.
flickr: Erica Marshall

37. Game’s submitting
scores to community.

38. Post high score to
twitter.

39. Announce new user
profile on Facebook.

40. Music related app uses
Last.fm for data.

41. Grab data to populate a
map.

42. Some devices are tied
directly to the cloud.

43. MORE and MORE!

44. Connection Methods.
flickr: barjack

45. Web Services
~=
The Cloud

46. XML
RESTful please!

47. XML
There is no SOAP Client #642 or XML-RPC Client
#1,203. You parse it yourself.

48. Options for Parsing
XML
• libxml2
• Tree-based: easy to parse, tree in memory
• Event-driven: less memory, more complex managing state
• Text reader: fast, easy to write
• NSXMLParser
• Event-driven: simpler but less powerful than libXML
• No NSXMLDocument on iPhone
• expat too!!!

51. XML Code
NSXMLParser *parser = [[NSXMLParser alloc]initWithData:....];

52. XML Code
NSXMLParser *parser = [[NSXMLParser alloc]initWithData:....];

53. XML [delegate] Code

54. XML [delegate] Code

55. XML Docs.
• “Event Driven XML Programming in
Cocoa” - ADC
• NSXMLParser.h / Supporting doc.
• NSXMLParserDelegate.h / Supporting doc.
• Sample code: XMLPerformance and
SeismicXML
• Google: cocoa + nsxmlparser

56. JSON
JavaScript Object Notation

59. JavaScript Object
Notation
• More lightweight than XML
• Similar to a Property List
• arrays, dictionaries, strings, numbers
• Open Source json-framework wrapper for
Objective-C
• no “official” Apple library (yet)

60. JavaScript Object
Notation
• If I have a choice, I prefer using JSON
• Lightweight
• Fast
• Easy to parse and map to objects.

61. JSON Looks like
{
“name” : “Hearful Andrena”,
“pets” : 23,
“poop-scooping-service” : false,
“pet-names” : [“Hanna”,
“Nemo”}
}

62. Parsing JSON
#import <JSON/JSON.h>
// Get a JSON string
NSString *jsonString = ....;
// Parsing will result in Foundation objects
id object = [jsonString JSONValue];

63. Using JSON-framework
// Create data.
NSDictionary *dictionary = ...;
// converts into a JSON spring.
jsonString = [dictionary JSONRepresentation];

65. UIWebView

66. Best Practices

67. Asynchronous
Never parse on the main thread.

68. NSOperation

69. Never assume you
know the size of the
server response.

70. Delegates methods

71. Show progress.

73. Debugging.

74. Caching

75. Libraries, Frameworks
and Wrappers
flickr: (Erik)

76. MGTwitterEngine

77. ObjectiveFlickr

78. Facebook Connect

79. iPhone on Rails

80. ASIHTTPRequest

81. Development Demos
flickr: TheNixer

82. Development Demos
flickr: TheNixer

83. Questions ?
flickr: Jim in Times Square

84. ninth Division
real legit growing apple platforms development
company in omaha, ne
www.ninthdivision.com
@ninthdivision