iPhone App Dev Overview - Mobile Dev Camp Vietnam 1


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An overview from A to Z of what it takes to develop applications for the iPhone or iPod Touch, from a Vietnam perspective: setting up, designing, coding, testing, releasing.

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iPhone App Dev Overview - Mobile Dev Camp Vietnam 1

  1. 1. iPhone App Dev Overview for Vietnamese coders Huy @ multinc.com 1
  2. 2. Warning ! This presentation may contain information on unethical activities, possibly illegal in certain jurisdictions. Listen & act at your own risk. 2
  3. 3. Note about Demos This presentation makes significant use of live demos, which are not included in the slides. 3
  4. 4. Why this talk? Global opportunity Few coders in Vietnam iPhone leads the mobile future The entire process is quite complex 4
  5. 5. Outline Part 1 - getting ready Part 2 - designing Part 3 - coding Part 4 - releasing 5
  6. 6. Get ready Part 1 6
  7. 7. Which dev device? iPhone iPhone iPhone iPod 3GS 3G 2G Touch App Store, multitouch, Yes Yes Yes Yes accelerometer cellular data, Yes Yes Yes camera GPS, 3G data Yes Yes video, autofocus, compass, more Yes speed & RAM 7
  8. 8. Getting a dev device Choices: 1. iPhone 3GS ($589 new in US) 2.iPhone 3G/2G (3G $300 on US craigslist) 3.iPod Touch (about $160 on US craigslist) 4.iPhone Simulator (free) Alternative: test at MultiNC in Q.1 (free++) 8
  9. 9. Apple restrictions Phone: any carrier Unlocked iPhone or iTouch Any web apps iPhone or iTouch App Store apps iPhone or iTouch Any apps Jailbroken iPhone or iTouch 9
  10. 10. Shhh... jailbreaking device PRO: required for software unlock PRO: install any app PRO: dev tools PRO: access to private APIs CON: have to wait for updates http://iphone-dev.org 10
  11. 11. SDK requirements Choice of computer: 1. Mac CON: expensive 2.PC with “Hackintosh”, “OSX86” CON: time-consuming, maybe not possible, not legal Alternative: open-source toolchain 11
  12. 12. Mac Macbook 2.4GHz is fine - $800 on US craigslist Mac Mini 2GHz should be fine - $500? on US craigslist 4GB of RAM is cheap Speed bottleneck is not building -- it’s transferring to device 12
  13. 13. Hackintossshhh... New PC Choose carefully http://osx86.org Existing PC Desktop - may need to buy video card Notebook - may need to buy Wi-Fi, maybe not possible AMD - forget it 13
  14. 14. Learning to code Lots of books Apple’s extensive documentation Stanford CS193p course -> Google [stanford iphone] Upcoming MultiUni courses http://multiuni.org 14
  15. 15. iPhone Dev Program Why? To test on non-jailbroken devices To release to App Store How much? $99 per year Workarounds? Test/deploy on jailbroken devices Share certs with other coders 15
  16. 16. DEMO: iPhone Dev Program 16
  17. 17. Design Part 2 17
  18. 18. Why design? To sell more To avoid rejection from the App Store 18
  19. 19. Design Resources Guides Apple’s Human Interface Guidelines (HIG) Stencils http://theresaneil.wordpress.com/2009/09/16/iphone3g- design-resources/ 19
  20. 20. Design Worflow Common: TapTapTap’s process: Iterate UI design with a graphic designer http://www.taptaptap.com/blog/the-design-session/ If remote, use Skitch 20
  21. 21. Design Process Iterate: DEMO: Convert design evolution http://www.taptaptap.com/blog/convert-design- evolution/ 21
  22. 22. Type of app Web app PRO: no approval needed CON: requires net, slower response, no games Native app App Store vs. jailbroken more later during Release part... 22
  23. 23. Code Part 3 23
  24. 24. Web App Toolkits DEMO: jQTouch iui The rest of this talk is about native apps 24
  25. 25. Languages & Tools Objective-C -> XCode Alternatives: Javascript/HTML -> Appcelerator Titanium, PhoneGap, Ansca Corona (good for games) careful, Apple hates Phonegap Ruby -> Rhodes Rhomobile .NET -> MonoTouch others... 25
  26. 26. Objective-C Superset of C, can be mixed with C, C++ Distinctions Message-passing for method calls Alloc/release/autorealease Categories 26
  27. 27. Set up Xcode DEMO Files, targets, configurations Layered settings: project vs. target GCC Set up warnings Subversion (but consider Git) 27
  28. 28. Interface Builder Not required, can be done programatically But rapid prototyping of views DEMO 28
  29. 29. Code structure DEMO of simple app 29
  30. 30. iPhone Simulator iPhone Simulator Missing: location, many preferences, multi-touch (has pinch) iSimulate Multi-touch Accelerometer Location/GPS 30
  31. 31. Coding style Apple’s coding guidelines for Cocoa Google’s Objective-C Style Guide 31
  32. 32. Debugging NSLog UIAlertView NOTE: popups are stacked Debugger DEMO NSZombieEnabled 32
  33. 33. Running static analyzer Choices: Download LLVM/CLang Static Analyzer Bundled in Xcode 3.2 (OS X 10.6) DEMO 33
  34. 34. Running Xcode Leaks DEMO 34
  35. 35. Deploying for testing Distribution choices: a) collect devices’ UDIDs & distribute Ad Hoc b)share your certificates c) jailbroken phones don’t require signing IMPORTANT: keep copy of .dSYM files 35
  36. 36. Beta testing Collect console logs using iPhone Configuration Utility Collect console logs and user data using Flurry or others Collect crash logs from users Users need to sync and find files on Mac Analyze using symbolicate and .dSYM files 36
  37. 37. Release Part 4 37
  38. 38. Release to App Store PRO: Easier access, greater exposure PRO: Apple handles billing, gives you 70% CON: infamous App Store approval process (weeks or months, possibly never) 38
  39. 39. Release to Cydia Store (jailbroken devices) PRO: No approval needed PRO: Unique markets, especially Vietnam PRO: Access to more functionality CON: Smaller market, exposure 39
  40. 40. App Store rejection examples Bugs Private APIs Downloaded code Non-working test account 40
  41. 41. App Store rejection examples Bad design (e.g. deselected tableview); re- using system icons; connectivity handling; feature-limited Excess vibration, bandwidth Uploading user data without warning But exceptions: “Don’t ask, don’t tell” 41
  42. 42. App Store rejection examples Objectional content, e.g. Me So Holy, Baby Shaker, StarTime, Eucalyptus, Ninjawords, NIN Competing with Apple & carriers, e.g. Google Voice & Skype Trademark, e.g. iPhone icon & name, Polaroid Icons that match, icons that don’t match Bad descriptions (“dragons”, competitor 42
  43. 43. Marketing App Store ranking Online reviews, Public Relations Video demos, using iSimulate Word-of-mouth Excellence -> Apple featured, marketing Free “lite” version Pricing strategy Appirater? 43
  44. 44. TapTapTap’s advertising of “Where To” 44
  45. 45. What kind of apps? Utility, productivity Business? Careful because officially not allowed Casual games, e.g. Pee monkey Arcade games, e.g. Meteor Blitz DEMO: Meteor Blitz video demo 45
  46. 46. Retire rich Part 5 46
  47. 47. What now? Get a Mac/Hackintosh Download the SDK Learn from Stanford course, MultiUni 47
  48. 48. Free 6-day course: Intro to iPhone & Objective-C Go to http://multiuni.org/ for details 48