1. SlideShare for the iPad
Tarik Bilgin
Robin Kansara
SJSU CMPE 277
Prof. Dan Harkey
Thursday, May 20, 2010

2. www.slideshare.net
• Community website
• The ‘YouTube’ of slideshow presentations
• users upload and share
• users search, browse, and view
Thursday, May 20, 2010

3. Project Vision
• To create an iPad application
• Using slideshare.net as a data source
• As iPhone devs wanted to experience iPad
development
• Explore iPad UI Design paradigms
Thursday, May 20, 2010

4. SlideShare API
• REST API
• XML over HTTP
• number of methods supported
• search method implemented
Thursday, May 20, 2010

5. Search Method URL
• http://www.slideshare.net/api/2/search_slideshows?
api_key=WFb6FGbR&ts=1274391804&hash=4feb64060786d3a51747b9974e
3d5a0a81e82151&q=mobiles
• API key = WFb6FGbR
• timestamp = 1274391804
• HMAC = 4feb64060786d3a51747b9974e3d5a0a81e82151
• search string = mobiles
Thursday, May 20, 2010

6. Sample XML Response
<Slideshows>
<Slideshow>
<ID>{ slideshow id }</ID>
<Description>{ slideshow description }</Description>
<Status>{ 0 if queued for conversion, 1 if converting, 2 if
converted,3 if conversion failed }
</Status>
<Username>{ username }</Username>
<URL>{ web permalink }</URL>
<ThumbnailURL>{ thumbnail URL }</ThumbnailURL>
<ThumbnailSmallURL>
{ URL of smaller thumbnail }
</ThumbnailSmallURL>
<Embed>{ embed code }</Embed>
<Created>{ date slideshow created }</Created>
<Language>
{ language, as specified by two-letter code }
</Language>
<Format>ppt (or pdf, pps, odp, doc, pot, txt, rdf) </Format>
<Download>{ 1 if available to download, else 0 }</Download>
</Slideshow>
...
</Slideshows>
Thursday, May 20, 2010

7. Demo
Thursday, May 20, 2010

8. XML Parsing
• Tree parse vs Event Parse
• Event parse, because memory efficiency/speed
• NSXMLParser - delegate methods
• parser:didStartElement:namespaceURI:qualified
Name:attributes:
• parser:foundCharacters:
• parser:didEndElement:namespaceURI:qualifiedN
ame:
Thursday, May 20, 2010

9. UI Design Basics
• We want to use the large screen
• UITabBarController for user stories
• UINavigationController for navigation
within each use case
Thursday, May 20, 2010

10. UI Design Process
• UITableViewController
• Rejected - designed for small screen
• UISplitViewController
• Rejected - not suitable for this scenario
• YouTube app UI style
• Approved - but not documented!
Thursday, May 20, 2010

11. YouTube on iPad
Thursday, May 20, 2010

12. AQGridView
• to our rescue from iPadDevCamp San Jose
• Jim Dovey, open sourced
• limited documentation
• Subclasses UIScrollView
Thursday, May 20, 2010

13. Grid View
Implementation
Thursday, May 20, 2010

14. An Observation
• Asynchronous vs. Synchronous network communication
• Apple recommends Asynchronous for a better user experience
• Many developers avoid it at first
• more complicated to implement
• much simpler than traditional threading
• callbacks to delegate methods
• connectionDidFinishLoading
• connectionDidReceiveResponse
Thursday, May 20, 2010

15. Synchronous Demo
Thursday, May 20, 2010