En esta primera sesión formativa, impartida por Sergi Hernando, CTO de Mobivery, se trataron los siguientes conceptos: Lenguaje (propiedades y protocolos de Objective-C) y Herramientas (Xcode)

1. CCRTVi
Formación en movilidad
Conceptos de desarrollo en iOS
1

2. Lenguaje
Herramientas
Herramientas
Del simulador al dispositivo
2

3. iOS 6.1
Xcode 4.6
3

4. Objective-C
@interface Video : NSObject
- (void)play;
- (void)pause;
@end
@implementation Video
- (void)play {
}
@end
4

5. Objective-C
@interface Video : NSObject
- (void)play;
- (void)pause;
@end
@implementation Video
- (void)play {
}
@end
Incomplete implementation
5

6. Objective-C
[myVideo play];
[myVideo pause];
6

7. Objective-C
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason:
'-[Video pause]: unrecognized selector sent to instance 0x8334620'
[myVideo play];
[myVideo pause]; Thread 1: signal SIGABRT
7

8. Objective-C
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason:
'-[Video pause]: unrecognized selector sent to instance 0x8334620'
[myVideo play];
[myVideo pause]; Thread 1: signal SIGABRT
“un objeto puede enviar un mensaje sin temor a
producir errores en tiempo de ejecución”
Wikipedia
8

9. Objective-C
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason:
'-[Video pause]: unrecognized selector sent to instance 0x8334620'
[myVideo play];
[myVideo pause]; Thread 1: signal SIGABRT
“un objeto puede enviar un mensaje sin temor a
producir errores en tiempo de ejecución”
No en la runtime library de iOS
9

10. Objective-C
10

11. Objective-C
Initializers
Video *myVideo = [[Video alloc] init];
// Es equivalente a:
Video *myVideo = [Video new];
11

12. Objective-C
Initializers
Video *myVideo = [[Video alloc] init];
// Es equivalente a:
Video *myVideo = [Video new];
Video *myVideo = [[Video alloc] initWithURL:theURL];
12

13. Objective-C
Initializers
Video *myVideo = [[Video alloc] init];
// Es equivalente a:
Video *myVideo = [Video new];
NSString *theURL = @"http://youtu.be/THERgYM8gBM";
Video *myVideo = [[Video alloc] initWithURL:theURL];
13

14. Objective-C
Initializers
Video *myVideo = [[Video alloc] init];
// Es equivalente a:
Video *myVideo = [Video new];
NSString *theURL = @"http://youtu.be/THERgYM8gBM";
Video *myVideo = [[Video alloc] initWithURL:theURL];
- (id)initWithURL:(NSString *)url {
! self = [super init];
! if(self) {
! ! _url = url;
! }
! return self;
}
14

15. Objective-C
Properties
Declaración
@interface Video : NSObject
@property NSString *title;
@property NSString *url;
@end
15

16. Objective-C
Properties
Modificadores
@interface Video : NSObject
@property NSString *title;
@property (readonly) NSString *url;
- (void)assignURL:(NSString *)url;
@end
16

17. Objective-C
Properties
Modificadores
#import "Video.h"
@implementation Video
- (void)assignURL:(NSString *)url {
// validaciones...
! self.url = url;
}
@end
17

18. Objective-C
Properties
Modificadores
#import "Video.h"
@implementation Video
- (void)assignURL:(NSString *)url {
// validaciones...
! self.url = url;
}
@end
Assignment to readonly property
18

19. Objective-C
Properties
Extensiones
#import "Video.h"
@interface Video ()
@property (readwrite) NSString *url;
@end
@implementation Video
- (void)assignURL:(NSString *)url {
// validaciones...
! self.url = url;
}
@end
19

20. Objective-C
Properties
Modificadores cool
@interface Video : NSObject
@property (readonly) BOOL ready;
@end
if([myVideo ready]) {
}
20

21. Objective-C
Properties
Modificadores cool
@interface Video : NSObject
@property (readonly, getter = isReady) BOOL ready;
@end
if([myVideo isReady]) {
}
21

22. Objective-C
Properties
Atomicidad
@interface Video : NSObject
@property (nonatomic) NSObject *whatever;
@end
22

23. Objective-C
Properties
strong & weak references
23

24. Objective-C
Properties
strong & weak references
24

25. Objective-C
Properties
strong & weak references
25

26. Objective-C
Protocols
@protocol Playable
- (void)play;
- (void)pause;
@optional
- (void)fastForward:(int)times;
@end
26

27. Objective-C
Protocols
@interface Video : NSObject <Playable>
@end
@implementation Video
#pragma mark - Playable
- (void)play {
}
- (void)pause {
}
- (void)fastForward:(int)times {
}
@end
27

28. Objective-C
Protocols
@interface PhotoSequence : NSObject <Playable>
@end
@implementation PhotoSequence
#pragma mark - Playable
- (void)play {
}
- (void)pause {
}
@end
28

29. Objective-C
Protocols
@interface PhotoSequence : NSObject <Playable>
@end
@implementation PhotoSequence
#pragma mark - Playable
- (void)play {
}
- (void)pause {
}
@end
29

30. Objective-C
Blocks
Tareas asíncronas
dispatch_queue_t queue =
dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(queue, ^{
// Long running task
});
30

31. dispatch_queue_t queue =
dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(queue, ^{
// Long running task
});
Objective-C
Blocks
Tareas asíncronas
31

32. dispatch_queue_t queue =
dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(queue, ^{
// Long running task
});
Objective-C
Blocks
Tareas asíncronas
32

33. Xcode
33

34. Xcode
Command LineTools
Instalación
34

35. Ruby
RubyVersion Manager
Instalación
$ export LANG=en_US.UTF-­‐8
$ curl -­‐L https://get.rvm.io | bash -­‐s stable -­‐-­‐autolibs=3 -­‐-­‐ruby
$ rvm install 1.9.3
35

36. Coffee Break!
36

37. Ruby
RubyVersion Manager
Instalación
$ rvm use 1.9.3-­‐p392
$ ruby -­‐v
ruby 1.9.3p392 (2013-­‐02-­‐22 revision 39386) [x86_64-­‐darwin12.3.0]
37

38. Ruby + Xcode
CocoaPods
Instalación
$ gem install cocoapods
$ pod setup
...
Setup completed (read-­‐only access)
$ echo 'platform :ios' > Podfile
$ pod install
...
[!] From now on use `Workshop.xcworkspace`.
38

39. Xcode
⇧⌘N
Master-Detail Application
39

40. Xcode
Use Storyboards, Core Data,ARC
and include UnitTests
40

41. Xcode
Create local git repository for this project
try.github.com
41

42. Xcode
42

43. Xcode
Schemes &Targets
“An scheme defines a collection of targets to
build, a configuration to use when building, and
a collection of tests to execute”
* Only one scheme can be active at a time
“A target specifies a product to build and
contains the instructions for building the
product from a set of files in a project or workspace”
* A product can be an app or a static library
43

44. Xcode
Workspaces & Projects
“A workspace is a document that groups
projects and other documents so you can
work on them together”
* Workspaces provide implicit and explicit relationships among the
included projects and their targets
“A project is a repository for all the files,
resources, and information required to build
one or more software products”
* Projects define default build settings for all their targets
44

45. Xcode
Relación entre unidades de trabajo
Workspace
Project
Project
Target
Target
Target
Scheme
45

46. Xcode
Primera ejecución
⌘R
46

47. Xcode
Primera ejecución
App simulada
47

48. Xcode
Preparando para dispositivo
Firma del código
Code Signing Identity: Don’t Code Sign
48

49. Xcode
Preparando para dispositivo
Certificado de desarrollo
Request a Certificate From a Certificate Authority...
49

50. Xcode
Preparando para dispositivo
Certificado de desarrollo
Request is: Saved to disk
50

51. Xcode
Preparando para dispositivo
Certificado de desarrollo
51

52. Xcode
Preparando para dispositivo
Certificado de desarrollo
52

53. Xcode
Preparando para dispositivo
Certificado de desarrollo
CER (certificado)
+ CSR (clave privada)
P12 (PKCS#12)
53

54. Xcode
Preparando para dispositivo
Certificado de desarrollo
CER (certificado)
+ CSR (clave privada)
P12 (PKCS#12)
54

55. Xcode
Preparando para dispositivo
Certificado de desarrollo
Certificado y clave privada
55

56. Xcode
Preparando para dispositivo
Certificado de desarrollo
File Format: Personal Information Exchange (.p12)
56

57. Xcode
Preparando para dispositivo
Certificado de desarrollo
57

58. Xcode
Git
58

59. Próxima sesión...
59