iOS Development: Everything you need to know

This talk was given at ISELTech 2013. The objective was to convince people to embrace iOS Development.

Transcript

1. iOS Development: Everything you need to know Fábio Bernardo iOS Developer @ SAPO
2. Who am I? • iOS Developer • SAPO • @fbbernardo on Twitter • iPhoneModem, It’s Playing, SAPO Desporto...
3. Who am I? • iOS Developer • SAPO • @fbbernardo on Twitter • iPhoneModem, It’s Playing, SAPO Desporto...
4. Who am I? • iOS Developer • SAPO • @fbbernardo on Twitter • iPhoneModem, It’s Playing, SAPO Desporto...
5. Who am I? • iOS Developer • SAPO • @fbbernardo on Twitter • iPhoneModem, It’s Playing, SAPO Desporto...
6. Why am I here? Talk overview • A little bit of history • What you need to know about the  App Store • The first steps of iOS Development • Cocoa Touch • What are my expectations for The Future™ • Q&A
7. The first iPhone June, 2007 • No App Store • Do web apps! ▪ Adventurous developers start using something called the “toolchain” • The jailbreak community is born • Installous and Cydia
8. The iPhone OS SDK July, 2008 • Developers everywhere rejoice • Cocoa Touch and Objective-C • Protected by NDA until October, 2008 • 70% – 30% revenue model • Introduced the Review Process • No video or audio recording, no notifications, no copy paste, no share, no core data, no maps... • Later renamed to iOS SDK
9. Rags to riches Some examples
10. Rags to riches Some examples Trism
11. Rags to riches Some examples Trism $250k in two months
12. Rags to riches Some examples iSteam
13. Rags to riches Some examples $100k in two weeks iSteam
14. Rags to riches Some examples Tap Tap Revenge
15. Rags to riches Some examples 1,000,000 downloads in two weeks Tap Tap Revenge
16. Rags to riches Some examples Flipboard
17. Rags to riches Some examples 52M users and only two apps Flipboard
18. iOS App Store Downloads and number of apps 0 200 400 600 800 2008 2009 2010 2011 2012 2013 0 11,250 22,500 33,750 45,000 10 1,500 5,000 15,000 25,000 45,000 0.8 65 250 425 550 800 Apps Available (Thousands) Downloads (Millions)
19. iOS App Store Interesting data • The top category by revenue ($) is Games • “iOS App Store generated 2.6x the app revenue of Google Play in Q1 2013” • Education is the fourth largest category in revenue ($) • Flipboard has 56M users and only two apps • Instagram has 100M users and only two apps • $10,000 prize for the App Store’s 50 billionth download
20. What you will need To become an iOS Developer • OS X • Objective-C • Cocoa Touch • An iPad/iPhone/iPod Touch for testing (unless you’re doing a fart app) • Register on Dev Center • $99 per year
21. Popular alternatives To OS X or Objective-C • RubyMotion — $199.99 (OS X) • Xamarin.iOS – formely MonoTouch — Free to $1899 (OS X & Windows) • Titanium — Free (OS X) • Adobe AIR — $249.00 (OS X & Windows) • Unity — $400 Free (OS X & Windows)
22. Objective-C Introduction • Unusual syntax • C based • Weak and dynamic typing • ARC • Categories • Swizzling
23. Objective-C The usual rants • Syntax • Crash logs & exceptions • Header files • Memory management • No packages
24. Objective-C An example – brackets object.performAction(); Object Method name [object performAction]; [object performAction];
25. Objective-C An example – brackets object.performAction(); Object Method name [object performAction]; [object performAction];
26. Objective-C An example – arguments object.performAction(arg1); Object Method name [object performAction:arg1]; A parameter
27. Objective-C An example – arguments & message names object.performAction(arg1, arg2); Object Method name [object performAction:arg1 withArg:arg2]; 1st parameter 2nd parameter
28. - (void)viewDidLoad { [super viewDidLoad]; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setTitle:@"Title" forState:UIControlStateNormal]; [button sizeToFit]; [self.view addSubview:button]; } Objective-C An example
29. - (void)viewDidLoad { [super viewDidLoad]; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setTitle:@"Title" forState:UIControlStateNormal]; [button sizeToFit]; [self.view addSubview:button]; } Objective-C An example
30. - (void)viewDidLoad { [super viewDidLoad]; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setTitle:@"Title" forState:UIControlStateNormal]; [button sizeToFit]; [self.view addSubview:button]; } Objective-C An example
31. - (void)viewDidLoad { [super viewDidLoad]; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setTitle:@"Title" forState:UIControlStateNormal]; [button sizeToFit]; [self.view addSubview:button]; } Objective-C An example
32. - (void)viewDidLoad { [super viewDidLoad]; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setTitle:@"Title" forState:UIControlStateNormal]; [button sizeToFit]; [self.view addSubview:button]; } Objective-C An example
33. - (void)viewDidLoad { [super viewDidLoad]; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setTitle:@"Title" forState:UIControlStateNormal]; [button sizeToFit]; [self.view addSubview:button]; } Objective-C An example
34. - (void)viewDidLoad { [super viewDidLoad]; UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setTitle:@"Title" forState:UIControlStateNormal]; [button sizeToFit]; [self.view addSubview:button]; } Objective-C An example
35. Cocoa Touch What it is • An umbrella term for a lot of API’s • Follows MVC • Lot’s of delegates, datasources, observers, notifications... • UIKit – buttons, sliders, navigation bars, toolbars, spinning wheels, bar buttons, storyboards... • GameKit, PassKit, CoreAnimation, Accounts, etc...
36. UIKit Storyboards
37. Demo
38. iOS Development Some notes • An iPhone & iPad application is an universal binary • 99% is reusable between iPhone and iPad • Easily ported to OSX • Game Center is your friend if you’re planning to make a game
39. Learn more The best resources out there • Stanford’s iPhone Application Development • Big Nerd Ranch’s iOS Programming • WWDC Sessions
40. Bingo! There’s this thing called WWDC Bingo... Retina Display Macbook Air iOS 7.0 Redesigned Passbooks via Bluetooth LE Interactive Push Notifications Retina iPad Mini Remote View Controllers One More Thing™ “Deliver Once” Notifications “magical” Siri API iCloud done right Apple TV SDK Siri for OSX Maps for OSX iCloud Sharing ?
41. Q&A