Introduction to the App Store and iOS Development

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

Transcript

2. Sarp Erdag
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!)
5. 585,000 apps in the App Store More than 25 billion downloads
6. Average download per app: 40.000
7. iOS Device Stats: 315 Million Sold, 62 Million In Q4 2011 Alone
8. Around 1.000.000 iOS devices in Turkey
9. 2500 apps created by Turkish developers
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/
12. App Distribution 1. Ad-Hoc (up to 100) 2. App Store 3. Enterprise App Store
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
14. Approval 1. Takes 7-10 days 2. App Review Guidelines 3. Strict and random
15. How to Market?
16. • Users can find your app by searching: • Company Name • App Name • Keywords (max 100 chars) App Store SEO
17. • Company Name • App Name • Keywords (max 100 chars) • App description (max 4000) chars • 5 screenshots App Store SEO
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
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
20. • iAds • Google Ads • AdMob • Turkcell mobil reklam Advertising
21. Development
22. • Latest SDK version = 5.1 • Xcode & iOS simulator (not emulator!) • Appcelerator Titanium (Wunderlist) • PhoneGap • RubyMotion • AppMakr • Parse and Kinvey
23. Human Interface Design Guidelines
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
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
26. HIG
27. Status Bar
28. Navigation Bar
29. Toolbar
30. Tab Bar
31. Popover (iPad)
32. Split View (iPad)
33. TableView
34. Grouped TableView
35. Webview
36. Alert
37. Action Sheet
38. Modal View
39. Pickers
40. Please, Don’t!
41. Others Network activity indicator Label Page Indicator Progress Indicator Search Bar Segmented Control Slider Switch
42. Notifications Badges Notifications
43. Icon
44. Icon • Apple adds gloss automatically • Apple adds rounded corners • No transparent icons allowed
45. Icon/App consistency
46. Don’t include words
49. Graphics • Make everything 24bit PNG • Add @2x versions for retina • Use unretinizer or iconify!
50. • Pttrns.com • Mobile-Patterns.com UI Design Patterns
51. Hello World! with IB
52. Objective-C
53. Objective-C basics • Object Oriented • Methods (not functions) • Instance Variables • Accessors (get and set methods) • Properties • Directives
54. Objective-C basics • Categories • Logging • Delegates
55. Methods [self.view setBackgroundColor:bgColor]; - (void)increaseAmount:(int)increase : (NSString*)string{ amount = amount + increase; amountLabel.text = [NSString stringWithFormat:@"%d TL", amount]; }
56. Class Header #import <Cocoa/Cocoa.h> @interface Photo : NSObject { NSString* caption; NSString* photographer; } @property (retain) NSString* caption; @property (retain) NSString* photographer; @end
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
58. Category #import <Cocoa/Cocoa.h> @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
59. Logging NSLog(@"Logging something!");
60. Memory Management IF YOU USE ALLOC, RETAIN or COPY THEN YOU NEED TO RELEASE
61. ARC ARC doesn't completely free you from worrying about memory management
62. What is Cocoa? A suite of object-oriented software libraries, a runtime system, and an integrated development environment.
63. Cocoa Architecture
64. Hello World! with Code
66. Xcode basics • Projects & Workspaces • Targets • Schemas • Debug / Release Modes • IB • Tools
67. Xcode basics • Code signing • Organizer • Build settings • Frameworks • Bundling • .ipa file
68. iOS Simulator • Not an emulator • Resetting • Location detection • Push notifications do not work • Non-retina by default
69. MVC
70. Open Source Libraries • AFNetworking • JSONKit • EGOCache • SVProgressHUD • Helpers • SVWebViewController