Idea to iOS

Previous version of the presentation I gave at Lafayette Mobile Jump Start. This one was given for Net2LFT

Transcript

1. Idea to iOS Ryan Farnell ryan.farnell@me.com Saturday, March 3, 12
2. About Me •Founder of Laughing Lark LLC •Developer at Bizzuka Inc •Web development for 5 years •iOS development for 2 years Saturday, March 3, 12
3. Released Apps Saturday, March 3, 12
4. Released Apps • Lafayette Traffic Saturday, March 3, 12
5. Released Apps • Lafayette Traffic • Shop Local Acadiana Saturday, March 3, 12
6. Agenda 1.Idea Refinement and Feature Selection 2.Design 3.Development 4.Testing 5.App Store Saturday, March 3, 12
7. Idea Refinement Saturday, March 3, 12
8. Potential Features • Accident data • Camera images • Location of redlight/speed cameras • Accident confirmation/clearing • Traffic speed data • Accident reporting • Favorites Saturday, March 3, 12
9. Application Definition Statement (ADS) Sentence or two about your application that can be used to “filter” what features should be included. Saturday, March 3, 12
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11. iPhoto • photo organizing • tagging • searching • sharing • slideshow creation • editing • print projects • viewing Saturday, March 3, 12
12. Application Definition Statement Photos should make browsing your photos easy and fun, and allow you to share them with friends. Saturday, March 3, 12
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14. Lafayette Traffic - ADS Lafayette Traffic should make finding up to date traffic information in Lafayette easy. Saturday, March 3, 12
15. Design Saturday, March 3, 12
16. Interface Design •One of the two most important parts of app development •To the end user, your interface is your app Saturday, March 3, 12
17. Interface Design •When I sit down with most people to talk about iPhone app ideas, this tends to be the least thought out part of the idea. •This usually the moment where you realize your idea isn’t as thought out as you as you believed. Saturday, March 3, 12
18. Interface Design •Try to stick to iOS UI conventions where you can •Take advantage of the fact that people already know how to use Apple’s UI’s •Keep in mind people use apps in a short burst of time. Make accessing the most useful parts of your app quick. Saturday, March 3, 12
19. Interface Design at Apple •Apple requires its designers to draw 10 different version of a user interface. •Iterating over a design that many times causes you to realize what’s really important •You can probably get away with 3-4 designs for your app. Saturday, March 3, 12
20. Interface Sketching •Pencil and paper •Photoshop/OmniGraffle Saturday, March 3, 12
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25. Icon Design •On iOS, your icon is your brand •If you aren’t a good designer, find someone to design one for you Saturday, March 3, 12
26. Photo by Jamison Wieser Saturday, March 3, 12
27. Design •If you have a well designed functional app, you get free marketing from Apple •Commercials •Apple Store demo devices •Special App Store page •They also hand out awards (Apple Design Award) Saturday, March 3, 12
28. Development Saturday, March 3, 12
29. Requirements •Intel Mac •Xcode 3/4 with the iOS SDK •iOS Developer Program Membership ($100/year) •Apps written in Obj-C/C/C++ * Saturday, March 3, 12
30. Other Requirements •Experience with objected orientated programming •Experience writing web services •Experience with UI programming Saturday, March 3, 12
31. Objective-C •Strict super-set of C •Dynamic •No Garbage Collection Saturday, March 3, 12
32. Objective-C •Don’t really need to know much C to use Obj-C •Manual memory management causes issues for newer Obj-C developers Saturday, March 3, 12
33. Memory •iOS device is not a desktop •Use memory as conservatively as possible •iOS will warn you when memory usage is getting high •Free cached resources that can be rebuilt easily Saturday, March 3, 12
34. Memory Device Ram iPhone, iPhone 3G, 1st/2nd Gen iPod Touch 128 MB iPhone 3GS, 3rd Gen iPod Touch, iPad, 4th Gen iPod Touch, 256MB iPhone 4 iPad 2 512MB Saturday, March 3, 12
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36. Model •Data for the application •Business, Contact, Song, Photo, etc. Saturday, March 3, 12
37. Data •Where will you be getting your data? •Internet? •User created on the device? •Both? Saturday, March 3, 12
38. Internet •Very common for iOS apps to connect to the Internet •How will you get this data? •Web service (hopefully) •Scraping a page •I’ve spent 50% of my first two projects on this Saturday, March 3, 12
39. User Created •Generated by the user •Storage •XML File •SQLite •Core Data •Generally the right solution Saturday, March 3, 12
40. Both •Caching internet data locally •Saving data that needs to be upload when no connection is available •Allow a lot more time to write syncing logic Saturday, March 3, 12
41. View •Represents what the user interacts with •This is where your design gets implemented •Views can contain views * Saturday, March 3, 12
42. View •Sticking to iOS built in Views saves a lot of time and buys you a lot of things for free •Customization through creating custom views and animations •UIView •CoreAnimation Saturday, March 3, 12
43. Controller •Links up your views and models •Most of your applications logic will go in here Saturday, March 3, 12
44. UIViewController •Most common iOS controller •Notifies you of when views are moving on and off screen •Notifies you when you are using up too much memory •Generally one per screen Saturday, March 3, 12
45. 3rd Party Development Environments •MonoTouch •Flash •PhoneGap •Unity Saturday, March 3, 12
46. 3rd Party Problems •Realize that you have the issue of waiting for a environment to be updated when a new iOS version comes out •Applications may not always work in the most efficient way •Start with a larger binary size Saturday, March 3, 12
47. Testing Saturday, March 3, 12
48. Testing •Testing on your own •Beta testing with users •Profiling Saturday, March 3, 12
49. Testing on Your Own Saturday, March 3, 12
50. Testing on Your Own •You can develop in the simulator but be sure you test on the device. Saturday, March 3, 12
51. Testing on Your Own •You can develop in the simulator but be sure you test on the device. •Test on the device! Saturday, March 3, 12
52. Testing on Your Own •You can develop in the simulator but be sure you test on the device. •Test on the device! •Simulator has the specs of you Mac, not of an iOS device Saturday, March 3, 12
53. Beta Testing •Collect UDIDs from testers’ devices •Create a provisioning profile •Email tester an IPA file •For iOS 4.0+ apps check out testflightapp.com Saturday, March 3, 12
54. Profiling •Use Instruments •Allows you test for leaks/zombies, overall memory usage, CPU usage, OpenGL ES performance Saturday, March 3, 12
55. App Store Saturday, March 3, 12
56. Approval Process •All apps must be approved by Apple •Checking for violation of guidelines, private API usage, and crashers •Currently 75% of new apps are approved in 7 days (3/6/2011) Saturday, March 3, 12
57. Approval Process •Updates to your app must also be approved •91% of updates are approved in 7 days or less (3/6/2011) •Best not to ship with something you can “fix with an update” •Special process for emergency updates (don’t abuse it) Saturday, March 3, 12
58. Monetization •3rd Party Ad Networks •iAds (60/40 cut) •One time price (70/30 cut) •In App Purchases and Subscriptions (70/30 cut) Saturday, March 3, 12
59. Recommended Books •Design •Tapworthy •Development •iPhone Programming: The Big Nerd Ranch Guide •Beginning iPhone 4 Development: Exploring the iOS SDK Saturday, March 3, 12
60. Recommended Viewing •iPhone Application Development (Winter 2010) - Stanford Course on iTunes U •WWDC 2010 Videos Saturday, March 3, 12
61. Questions? Saturday, March 3, 12