Introduction to the App Store and iOS Development

A crash course I gave for a software development company in Istanbul.

Transcript

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2. Sarp Erdag
   

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4. What is an “App”?
   • Not a mobile web site!
   • Something you want to carry in your pocket!
   • Something you need to interact frequently.
   • Bigger suite, broken into little pieces.
   (Facebook app = bad)
   (Camera app = good!)
   

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5. 585,000 apps in the App Store
   More than 25 billion downloads
   

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6. Average download per app:
   40.000
   

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7. iOS Device Stats: 315
   Million Sold, 62 Million
   In Q4 2011 Alone
   

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8. Around 1.000.000 iOS
   devices in Turkey
   

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9. 2500 apps created by
   Turkish developers
   

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10. Most popular apps
    Rank Paid apps Free apps
    1 Angry Birds Facebook
    2 Fruit Ninja Pandora Radio
    3 Doodle Jump Words With Friends Free
    4 Cut the Rope Skype
    5 Angry Birds Seasons The Weather Channel
    6 Words With Friends Google Search
    7 Tiny Wings Google Earth
    8 Angry Birds Rio Angry Birds Free
    9 Pocket God Shazam
    10 Camera+ Netflix
    Retrieved May 14, 2012. http://www.macobserver.com/tmo/article/apple_names_all-time_top_app_store_apps/
    

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12. App Distribution
    1. Ad-Hoc (up to 100)
    2. App Store
    3. Enterprise App Store
    

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13. Prices
    FREE!
    PAID
    • Min Price = $0.99
    • Revenue per application = $8,700
    • Apple takes 30% revenue
    • In app purchases
    • No other forms of payment allowed
    OR
    

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14. Approval
    1. Takes 7-10 days
    2. App Review Guidelines
    3. Strict and random
    

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15. How to
    Market?
    

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16. • Users can find your app by searching:
    • Company Name
    • App Name
    • Keywords (max 100 chars)
    App Store SEO
    

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17. • Company Name
    • App Name
    • Keywords (max 100 chars)
    • App description (max 4000) chars
    • 5 screenshots
    App Store SEO
    

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18. • Can choose the publish date
    • Ratings are reset when an update is
    released.
    • Astoturfing is illegal.
    • No way to track download locations.
    • Most sales in weekends.
    App Store SEO
    

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19. • Apple might choose your app in the
    features apps section.
    • If featured, it takes 1 to 2 weeks.
    • Increases sales by 20%
    App Store SEO
    

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20. • iAds
    • Google Ads
    • AdMob
    • Turkcell mobil reklam
    Advertising
    

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21. Development
    

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22. • Latest SDK version = 5.1
    • Xcode & iOS simulator (not emulator!)
    • Appcelerator Titanium (Wunderlist)
    • PhoneGap
    • RubyMotion
    • AppMakr
    • Parse and Kinvey
    

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23. Human Interface
    Design Guidelines
    

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24. HIG
    • People Interact with One App at a Time
    • The comfortable minimum size of tappable
    UI elements is 44 x 44 points.
    • Preferences should be in Settings app
    • Onscreen User Help is Minimal
    

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25. HIG
    • People expect immediate feedback when
    they operate a control, and they appreciate
    status updates during lengthy operations.
    (Eg: Instagram for uploading photo)
    • People us apps in one hand, and gesturing
    with the thumb of the same hand
    • Consider Adding Physicality and Realism
    

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26. HIG
    

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27. Status Bar
    

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28. Navigation Bar
    

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29. Toolbar
    

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30. Tab Bar
    

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31. Popover (iPad)
    

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32. Split View (iPad)
    

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33. TableView
    

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34. Grouped TableView
    

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35. Webview
    

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36. Alert
    

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37. Action Sheet
    

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38. Modal View
    

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39. Pickers
    

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40. Please, Don’t!
    

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41. Others
    Network activity indicator
    Label
    Page Indicator
    Progress Indicator
    Search Bar
    Segmented Control
    Slider
    Switch
    

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42. Notifications
    Badges
    Notifications
    

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43. Icon
    

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44. Icon
    • Apple adds gloss automatically
    • Apple adds rounded corners
    • No transparent icons allowed
    

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45. Icon/App consistency
    

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46. Don’t include words
    

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49. Graphics
    • Make everything 24bit PNG
    • Add @2x versions for retina
    • Use unretinizer or iconify!
    

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50. • Pttrns.com
    • Mobile-Patterns.com
    UI Design Patterns
    

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51. Hello World!
    with IB
    

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52. Objective-C
    

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53. Objective-C basics
    • Object Oriented
    • Methods (not functions)
    • Instance Variables
    • Accessors (get and set methods)
    • Properties
    • Directives
    

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54. Objective-C basics
    • Categories
    • Logging
    • Delegates
    

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55. Methods
    [self.view setBackgroundColor:bgColor];
    - (void)increaseAmount:(int)increase :
    (NSString*)string{
    amount = amount + increase;
    amountLabel.text = [NSString
    stringWithFormat:@"%d TL", amount];
    }
    

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56. Class Header
    #import
    @interface Photo : NSObject
    {
    NSString* caption;
    NSString* photographer;
    }
    @property (retain) NSString* caption;
    @property (retain) NSString* photographer;
    @end
    

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57. Class Implementation
    #import "Photo.h"
    @implementation Photo
    @synthesize caption;
    @synthesize photographer;
    - (id) init
    {
    if ( self = [super init] )
    {
    self.caption = @"Default Caption";
    self.photographer = @"Default Photographer";
    }
    return self;
    }
    - (void) dealloc
    {
    [self.caption release];
    [self.photographer release];
    [super dealloc];
    }
    - (NSString*)description
    {
    return [NSString stringWithFormat:@"Photo caption: %@, photographer: %@", self.caption,
    self.photographer];
    }
    @end
    

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58. Category
    #import
    @interface NSString (Utilities)
    - (BOOL) isURL;
    @end
    #import "NSString-Utilities.h"
    @implementation NSString (Utilities)
    - (BOOL) isURL
    {
    if ( self.length < 7 ) return NO;
    NSRange range = NSMakeRange(0,7);
    NSString* prefix = [self
    substringWithRange:range];
    if ( [prefix isEqualToString:@"http://"] )
    return YES;
    else
    return NO;
    }
    @end
    

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59. Logging
    NSLog(@"Logging something!");
    

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60. Memory Management
    IF YOU USE ALLOC, RETAIN or COPY THEN
    YOU NEED TO RELEASE
    

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61. ARC
    ARC doesn't completely free
    you from worrying about
    memory management
    

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62. What is Cocoa?
    A suite of object-oriented
    software libraries, a runtime
    system, and an integrated
    development environment.
    

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63. Cocoa Architecture
    

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64. Hello World!
    with Code
    

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66. Xcode basics
    • Projects & Workspaces
    • Targets
    • Schemas
    • Debug / Release Modes
    • IB
    • Tools
    

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67. Xcode basics
    • Code signing
    • Organizer
    • Build settings
    • Frameworks
    • Bundling
    • .ipa file
    

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68. iOS Simulator
    • Not an emulator
    • Resetting
    • Location detection
    • Push notifications do not work
    • Non-retina by default
    

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69. MVC
    

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70. Open Source Libraries
    • AFNetworking
    • JSONKit
    • EGOCache
    • SVProgressHUD
    • Helpers
    • SVWebViewController
    

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