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iPhone for .NET Developers

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Ben Scheirman

This document provides an overview of iPhone development for .NET developers. It discusses the tools needed like Xcode and the iOS SDK. It introduces Objective-C concepts like classes, methods, memory management using retain/release. It also covers view controllers, the model-view-controller pattern, and the iOS application lifecycle. The goal is to help .NET developers get started with iPhone development.

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iPhone for .NET Developers Ben Scheirman Director of Development - ChaiONE @subdigital Tuesday, September 28, 2010
What you need A Mac Xcode iPhone SDK (limited to Simulator) iPhone Developer Program ($99 /year) Tuesday, September 28, 2010
Objective-C Based on C Object Oriented Dynamic A little weird Powerful Tuesday, September 28, 2010
Objective-C Primer Calling methods Tuesday, September 28, 2010
Objective-C Primer Calling methods [someObject someMethod]; Tuesday, September 28, 2010
Objective-C Primer Calling methods [someObject someMethod]; [someObject someMethodWithInput:5]; Tuesday, September 28, 2010
Objective-C Primer Calling methods [someObject someMethod]; [someObject someMethodWithInput:5]; [dictionary setObject:obj forKey:key]; Tuesday, September 28, 2010
Objective-C Primer Nesting method calls Tuesday, September 28, 2010
Objective-C Primer Nesting method calls [NSString stringWithFormat: [prefs format]]; Tuesday, September 28, 2010
Objective-C Primer Instantiating classes Tuesday, September 28, 2010
Objective-C Primer Instantiating classes UIView *view = [[UIView alloc] init]; Tuesday, September 28, 2010
Objective-C Primer Instantiating classes UIView *view = [[UIView alloc] init]; NSDate *date = [NSDate date]; Tuesday, September 28, 2010
Objective-C Primer De?ning Classes Tuesday, September 28, 2010
Objective-C Primer De?ning Classes //Person.h @interface Person { //instance variables } //properties & methods @end Tuesday, September 28, 2010
Objective-C Primer De?ning Classes Tuesday, September 28, 2010
Objective-C Primer De?ning Classes //Person.m #import "Person.h" @implementation Person //implement properties & methods @end Tuesday, September 28, 2010
Objective-C Primer De?ning Methods Tuesday, September 28, 2010
Objective-C Primer De?ning Methods -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Tuesday, September 28, 2010
Objective-C Primer De?ning Methods Method name (selector) -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Tuesday, September 28, 2010
Objective-C Primer De?ning Methods Method name (selector) -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Return Type Tuesday, September 28, 2010
Objective-C Primer De?ning Methods Method name (selector) -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Return Type Instance method Tuesday, September 28, 2010
Objective-C Primer De?ning Methods Method name (selector) -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Return Type Parameters Instance method Tuesday, September 28, 2010
Memory Management No garbage collection on the iPhone Retain / Release Tuesday, September 28, 2010
Memory Management Retain / Release Dance Tuesday, September 28, 2010
Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; Tuesday, September 28, 2010
Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; 2 [foo retain]; Tuesday, September 28, 2010
Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; 2 [foo retain]; 1 [foo release]; Tuesday, September 28, 2010
Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; 2 [foo retain]; 1 [foo release]; [foo release]; 0 Tuesday, September 28, 2010
Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; 2 [foo retain]; 1 [foo release]; [foo release]; foo is deallocated 0 Tuesday, September 28, 2010
Getters / Setters Tuesday, September 28, 2010
Getters / Setters [foo setBar:@"baz"]; Tuesday, September 28, 2010
Getters / Setters [foo setBar:@"baz"]; [foo bar]; //returns @"baz" Tuesday, September 28, 2010
Getters / Setters [foo setBar:@"baz"]; [foo bar]; //returns @"baz" foo.bar = @"gruul"; Tuesday, September 28, 2010
Getters / Setters [foo setBar:@"baz"]; [foo bar]; //returns @"baz" foo.bar = @"gruul"; foo.bar //returns @"gruul" Tuesday, September 28, 2010
Implementing setters Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { if(bar == value) return; Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; } Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; } if(value != nil) Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; } if(value != nil) bar = [value retain]; Tuesday, September 28, 2010
Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; } if(value != nil) bar = [value retain]; } Tuesday, September 28, 2010
No Thanks Tuesday, September 28, 2010
Properties Tuesday, September 28, 2010
Properties //Foo.h Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { [image release]; Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { [image release]; [message release]; Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { [image release]; [message release]; [super dealloc]; Tuesday, September 28, 2010
Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { [image release]; [message release]; [super dealloc]; } Tuesday, September 28, 2010
Dot Syntax Dogma Use dot syntax if you like it Just be aware of what it's hiding Tuesday, September 28, 2010
Xcode Your IDE Code completion Interactive Debugger Lacks good refactoring tools Tuesday, September 28, 2010
Interface Builder Drag-n-drop UI building Layouts are de?ned in XIBs (XML representation). Usually called "Nibs" "Make connections" with classes de?ned in Xcode variables --> UI components UI events --> methods Tuesday, September 28, 2010
Instruments Find Memory Leaks Analyze Memory Usage Track down slow code Tuesday, September 28, 2010
iOS SDK Accelerate CoreMotion AddressBook CoreTelephony AudioToolbox CoreText Your app AVFoundation CoreVideo UIKit CoreAudio GameKit CoreFoundation CoreData iAd CoreGraphics CoreLocation MapKit CFNetwork StoreKit Tuesday, September 28, 2010
Model View Controller Model View Controller Tuesday, September 28, 2010
The View Controller Handles setup logic for a screen Handles user input Interacts with the model Contains 1 or more views Tuesday, September 28, 2010
The View Visual representation Drawing Laying out subviews (autorotation) May Handle touch events Tuesday, September 28, 2010
Lifecycle of an App main.m Tuesday, September 28, 2010
Lifecycle of an App main.m UIApplication Tuesday, September 28, 2010
Lifecycle of an App main.m UIApplication Tuesday, September 28, 2010
Lifecycle of an App main.m MainWindow.xib UIApplication Tuesday, September 28, 2010
Lifecycle of an App main.m MainWindow.xib UIApplication Tuesday, September 28, 2010
Lifecycle of an App main.m MainWindow.xib UIApplication YourAppDelegate UIWindow Root View Controller Tuesday, September 28, 2010
Lifecycle of an App main.m MainWindow.xib UIApplication YourAppDelegate applicationDidFinishLaunching UIWindow Root View Controller Tuesday, September 28, 2010
Time to code! Tuesday, September 28, 2010

More Related Content

iPhone for .NET Developers

  • 1. iPhone for .NET Developers Ben Scheirman Director of Development - ChaiONE @subdigital Tuesday, September 28, 2010
  • 2. What you need A Mac Xcode iPhone SDK (limited to Simulator) iPhone Developer Program ($99 /year) Tuesday, September 28, 2010
  • 3. Objective-C Based on C Object Oriented Dynamic A little weird Powerful Tuesday, September 28, 2010
  • 4. Objective-C Primer Calling methods Tuesday, September 28, 2010
  • 5. Objective-C Primer Calling methods [someObject someMethod]; Tuesday, September 28, 2010
  • 6. Objective-C Primer Calling methods [someObject someMethod]; [someObject someMethodWithInput:5]; Tuesday, September 28, 2010
  • 7. Objective-C Primer Calling methods [someObject someMethod]; [someObject someMethodWithInput:5]; [dictionary setObject:obj forKey:key]; Tuesday, September 28, 2010
  • 8. Objective-C Primer Nesting method calls Tuesday, September 28, 2010
  • 9. Objective-C Primer Nesting method calls [NSString stringWithFormat: [prefs format]]; Tuesday, September 28, 2010
  • 10. Objective-C Primer Instantiating classes Tuesday, September 28, 2010
  • 11. Objective-C Primer Instantiating classes UIView *view = [[UIView alloc] init]; Tuesday, September 28, 2010
  • 12. Objective-C Primer Instantiating classes UIView *view = [[UIView alloc] init]; NSDate *date = [NSDate date]; Tuesday, September 28, 2010
  • 13. Objective-C Primer De?ning Classes Tuesday, September 28, 2010
  • 14. Objective-C Primer De?ning Classes //Person.h @interface Person { //instance variables } //properties & methods @end Tuesday, September 28, 2010
  • 15. Objective-C Primer De?ning Classes Tuesday, September 28, 2010
  • 16. Objective-C Primer De?ning Classes //Person.m #import "Person.h" @implementation Person //implement properties & methods @end Tuesday, September 28, 2010
  • 17. Objective-C Primer De?ning Methods Tuesday, September 28, 2010
  • 18. Objective-C Primer De?ning Methods -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Tuesday, September 28, 2010
  • 19. Objective-C Primer De?ning Methods Method name (selector) -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Tuesday, September 28, 2010
  • 20. Objective-C Primer De?ning Methods Method name (selector) -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Return Type Tuesday, September 28, 2010
  • 21. Objective-C Primer De?ning Methods Method name (selector) -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Return Type Instance method Tuesday, September 28, 2010
  • 22. Objective-C Primer De?ning Methods Method name (selector) -(void)showLoadingText:(NSString *)text animated:(BOOL)animated; Return Type Parameters Instance method Tuesday, September 28, 2010
  • 23. Memory Management No garbage collection on the iPhone Retain / Release Tuesday, September 28, 2010
  • 24. Memory Management Retain / Release Dance Tuesday, September 28, 2010
  • 25. Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; Tuesday, September 28, 2010
  • 26. Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; 2 [foo retain]; Tuesday, September 28, 2010
  • 27. Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; 2 [foo retain]; 1 [foo release]; Tuesday, September 28, 2010
  • 28. Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; 2 [foo retain]; 1 [foo release]; [foo release]; 0 Tuesday, September 28, 2010
  • 29. Memory Management Retain / Release Dance 1 Foo *foo = [[Foo alloc] init]; 2 [foo retain]; 1 [foo release]; [foo release]; foo is deallocated 0 Tuesday, September 28, 2010
  • 30. Getters / Setters Tuesday, September 28, 2010
  • 31. Getters / Setters [foo setBar:@"baz"]; Tuesday, September 28, 2010
  • 32. Getters / Setters [foo setBar:@"baz"]; [foo bar]; //returns @"baz" Tuesday, September 28, 2010
  • 33. Getters / Setters [foo setBar:@"baz"]; [foo bar]; //returns @"baz" foo.bar = @"gruul"; Tuesday, September 28, 2010
  • 34. Getters / Setters [foo setBar:@"baz"]; [foo bar]; //returns @"baz" foo.bar = @"gruul"; foo.bar //returns @"gruul" Tuesday, September 28, 2010
  • 36. Implementing setters -(void)setBar:(id)value { Tuesday, September 28, 2010
  • 37. Implementing setters -(void)setBar:(id)value { if(bar == value) return; Tuesday, September 28, 2010
  • 38. Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { Tuesday, September 28, 2010
  • 39. Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; Tuesday, September 28, 2010
  • 40. Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; Tuesday, September 28, 2010
  • 41. Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; } Tuesday, September 28, 2010
  • 42. Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; } if(value != nil) Tuesday, September 28, 2010
  • 43. Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; } if(value != nil) bar = [value retain]; Tuesday, September 28, 2010
  • 44. Implementing setters -(void)setBar:(id)value { if(bar == value) return; if(bar != nil) { [bar release]; bar = nil; } if(value != nil) bar = [value retain]; } Tuesday, September 28, 2010
  • 47. Properties //Foo.h Tuesday, September 28, 2010
  • 48. Properties //Foo.h @property (nonatomic, retain) UIImage *image; Tuesday, September 28, 2010
  • 49. Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; Tuesday, September 28, 2010
  • 50. Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m Tuesday, September 28, 2010
  • 51. Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; Tuesday, September 28, 2010
  • 52. Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { Tuesday, September 28, 2010
  • 53. Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { [image release]; Tuesday, September 28, 2010
  • 54. Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { [image release]; [message release]; Tuesday, September 28, 2010
  • 55. Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { [image release]; [message release]; [super dealloc]; Tuesday, September 28, 2010
  • 56. Properties //Foo.h @property (nonatomic, retain) UIImage *image; @property (nonatomic, copy) NSString *message; //Foo.m @synthesize image, message; -(void)dealloc { [image release]; [message release]; [super dealloc]; } Tuesday, September 28, 2010
  • 57. Dot Syntax Dogma Use dot syntax if you like it Just be aware of what it's hiding Tuesday, September 28, 2010
  • 58. Xcode Your IDE Code completion Interactive Debugger Lacks good refactoring tools Tuesday, September 28, 2010
  • 59. Interface Builder Drag-n-drop UI building Layouts are de?ned in XIBs (XML representation). Usually called "Nibs" "Make connections" with classes de?ned in Xcode variables --> UI components UI events --> methods Tuesday, September 28, 2010
  • 60. Instruments Find Memory Leaks Analyze Memory Usage Track down slow code Tuesday, September 28, 2010
  • 61. iOS SDK Accelerate CoreMotion AddressBook CoreTelephony AudioToolbox CoreText Your app AVFoundation CoreVideo UIKit CoreAudio GameKit CoreFoundation CoreData iAd CoreGraphics CoreLocation MapKit CFNetwork StoreKit Tuesday, September 28, 2010
  • 62. Model View Controller Model View Controller Tuesday, September 28, 2010
  • 63. The View Controller Handles setup logic for a screen Handles user input Interacts with the model Contains 1 or more views Tuesday, September 28, 2010
  • 64. The View Visual representation Drawing Laying out subviews (autorotation) May Handle touch events Tuesday, September 28, 2010
  • 65. Lifecycle of an App main.m Tuesday, September 28, 2010
  • 66. Lifecycle of an App main.m UIApplication Tuesday, September 28, 2010
  • 67. Lifecycle of an App main.m UIApplication Tuesday, September 28, 2010
  • 68. Lifecycle of an App main.m MainWindow.xib UIApplication Tuesday, September 28, 2010
  • 69. Lifecycle of an App main.m MainWindow.xib UIApplication Tuesday, September 28, 2010
  • 70. Lifecycle of an App main.m MainWindow.xib UIApplication YourAppDelegate UIWindow Root View Controller Tuesday, September 28, 2010
  • 71. Lifecycle of an App main.m MainWindow.xib UIApplication YourAppDelegate applicationDidFinishLaunching UIWindow Root View Controller Tuesday, September 28, 2010
  • 72. Time to code! Tuesday, September 28, 2010