DeveloperUG 2013: Developing for iOS - When to do what and how

In this session we will look at the tools, framework and languages available to build applications for the iOS. The session will explore various development approaches for creating iOS apps including native, hybrid and web. Tools that we be covered include Xcode (ObjC), MonoTouch (C#) and other web-based and hybrid frameworks.

This session will also discuss development strategies to apply when targeting many devices.

Transcript

1. Developing for iOS - When to do what and how @martincronje martin@nreality.com
2. agenda
3. the market
4. 7 billion mobile phones
5. 1,5 billion smartphones
7. why iOS?
8. Android won, right?
9. Android has 75% market share
10. Platform Mobile OS 2013[a] Mobile OS 2017[a] App downloads 2013[b] Web usage 2013[c] 3.9% 10.2% 3.7% 1.5% 16.9% 17.9% 47.8% 54.91% 75.3% 68.3% 48.6% 25.7% 3.9% 3.6% - 17,89% Target platform (Global market share)? a) IDC Worldwide Mobile Phone Tracker, June 6, 2012 b) XYO Global App Download Reports 1.0 c) NetMarketShare Mobile Operating System Aug 2013 …
14. native vs. hybrid vs. web
15. When you want the worst of both... Hybrid:
16. != != Hybrid…
17. “The biggest mistake we’ve made as a company is betting on HTML5 over native.” Mark Zuckerberg
18. When you want to extend your phone... Native:
19. When you want cost-effective... Web:
20. Approach characteristics User Experience Device Access Works offline Cost of ownership Reach Native Highest Yes Yes Highest Specific Cross Platform High Yes * Yes * High ** Common * Hybrid Low Yes * Partially * Medium ** Common * Web (Rich) Low Limited No Low 30% Web (Light) Lowest None No Lowest 80% * Depends on framework and approach chosen. ** Depending on support offered by relevant platform
21. becoming an iOS developer
22. Developing Apps for iPhone and iPad (Winter 2013)
25. my setup
26. My setup MacBook Pro 15” (Retina Display, 8GB RAM, i7, SSD) OSX Mountain Lion 10.8.4 Windows 8 Xcode / AppCode Xamarin Studio Visual Studio 2012 Xamarin Studio VMWare Fusion
27. My software on OSX IDE Xcode, AppCode and Xamarin Studio Editors vi and Sublime Shell iTerm, zsh and oh-my-zsh Misc Homebrew, Alfred, AirMail, Fanstical and 1Password
28. Objective-C
29. Classes
30. Methods [myObject insertObject:objectToInsert atIndex:0];!
31. -(id)doYouKnowTheMuffinMan:(TheMuffinMan *)theMuffinMan;!
32. Blocks int result = myBlock(4); // result is 28!
33. Literals NSNumber *number;! ! number = [NSNumber numberWithChar:'X'];! number = [NSNumber numberWithInt:12345];! number = [NSNumber numberWithUnsignedLong:12345ul];! number = [NSNumber numberWithLongLong:12345ll];! number = [NSNumber numberWithFloat:123.45f];! number = [NSNumber numberWithDouble:123.45];! number = [NSNumber numberWithBool:YES];! number = @'X’;! number = @12345;! number = @12345ul;! number = @12345ll;! number = @123.45f;! number = @123.45;! number = @YES;!
34. Literals dict = [NSDictionary dictionaryWithObjects:@[o1, o2, o3]! forKeys:@[k1, k2, k3]];! ! dict = @{ k1 : o1, k2 : o2, k3 : o3 };! ! ! ! ! array = [NSArray arrayWithObjects:a, b, c, nil];! ! array = @[ a, b, c ];! !
35. Automatic Reference Counting (ARC)
36. ObjectiveC is a wild horse
37. Cocoa
38. MVC
39. Notification centre
40. Key-value observing
41. Animated - (void)reset:(BOOL)animated {! if(animated) {! [UIView animateWithDuration:0.3f! delay:0.0f! options:(UIViewAnimationOptionCurveEaseIn)! animations:! ^{! self.front.alpha = 1.0;! self.front.frame = CGRectMake(0, 0, width, height);! } completion:nil];! } else {! self.front.alpha = 1.0;! }! }!
42. Tips
43. Asynchronous Processing [NROperationQueue runInBackground:^() {! // Some long-running operation! [NROperationQueue runOnMain:^() { ! // Update the UI ! }];! }];! ! ! ! @implementation NROperationQueue! + (void)runOnMain:(void (^)(void))block {! [[NSOperationQueue mainQueue] addOperationWithBlock:block];! }! + (NSOperationQueue *)backgroundQueue {! return [self instance].backgroundQueue; // NSOperationQueue ! }! @end!
44. Factory Methods #import "ECMIncident.h"! #import "NSDictionary+Conversions.h"! ! @implementation ECMIncident! ! - (id)initFromJSON:(NSDictionary *)jsonObject {! if(self = [super init]) {! self.activity = [jsonObject stringForKey:@"activity"];! self.age = [jsonObject numberForKey:@"age"];! }! return self;! }! ! + (ECMIncident *)incidentFromJSON:(NSDictionary *)dictionary {! return [[ECMIncident alloc] initFromJSON: dictionary];! }! ! @end!
45. Test-driven development -  (void)testShouldParseJsonIntoModel {! NSData *content = [self loadFile:@"incident.simple"];! ! NSError *error = nil;! NSDictionary *jsonObject = [NSJSONSerialization ! JSONObjectWithData : content! options : nil ! error : &error];! ! ECMIncident *incident = [ECMIncident incidentFromJSON: jsonObject];! ! STAssertNotNil(incident, @"Expected populated object");! STAssertTrue([incident.summary isEqualToString:@"Foo Bar"]);! }!
46. Some other tips •  Information hiding •  Singletons and dependency injection
47. Frameworks
48. Cocoapods $ gem install cocoapods! $ cat Podfile! platform :ios, :deployment_target => '6.0'! pod 'AFNetworking'! pod 'Objection'! pod 'Facebook-iOS-SDK'! pod 'OCHamcrest'! ! $ pod setup!
49. Frank Feature: General (Main)! Scenario: My details! ! Given I logged in with "my-user-1" ! And I wait for "Logging in…" to go away! When I touch the "My Details" table cell! Then I wait to see a navigation bar titled "My Details"! And I should see a table containing the following:! | Column 1 |! | Username | ! | Email |! | First Name |! ...! When I type "Martin" into the Username text field! And I ...!
50. Frank Then /^I wait to see a navigation bar titled "([^\"]*)"$/ do |expected_mark|! quote = get_selector_quote(expected_mark)! message = "waited to see a navigation bar titled #{quote}#{expected_mark}#{quote}"! wait_until( :timeout => 30, :message => message) {! element_exists( "navigationItemView marked:#{quote}#{expected_mark}#{quote}" )! }! end! ! When /^I touch the "([^\"]*)" table cell$/ do |name|! touch("tableView view marked:'#{name}'")! end! ! When /^I type "([^"]*)" into the ([^"]*) text field$/ do |value, field|! selector = "label marked:'#{field}' parent tableViewCell textField"! text_fields_modified = frankly_map(selector, "setText:", value )! raise "could not find text fields to update" if text_fields_modified.empty?! end!
51. Frank Then /^I should see a table containing the following:$/ do |table|! ! table.rows.each do |row|! selector = String.new! ! row.each do |cell|! if selector.empty?! selector = "tableView view marked:'#{cell}'"! else! selector << " parent tableViewCell view marked:'#{cell}'"! end! end! check_element_exists( selector )! end! end!
53. mono vs objective-c
54. Development platform Platform IDE SDK Language OS Visual Studio Windows Phone C#, etc. Windows Xcode Cocoa Touch Objective-C OSX Eclipse Android Java All
55. Development platform Platform IDE SDK Language OS Visual Studio Windows Phone C#, etc. Windows Visual Studio Xamarin Studio Cocoa Touch C# (Compiled to ObjC) Windows* / OSX Visual Studio Xamarin Studio Android C# Windows / OSX * OSX build server required
56. Sharing Code Application Layer User Interface Android SDK Android SDK Cocoa Touch Cocoa Touch Win Phone SDK Win Phone SDK Shared - Model - Data Access - Business Logic - Service Access
57. Android SDK Cocoa Touch Win Phone SDK Xamarin.Mobile App Layer Sharing Code UI Android SDK Cocoa Touch Win Phone SDK Shared Business Logic Adapter pattern View Controller