iPhone Programming in 30 minutes (?) [FTS]
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Talk at PhD Computer Science students’ Journal Club in Cardiff University (FTS - Food, Talks and Stuff).
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iPhone Programming in 30 minutes (?) [FTS]
- 1. FTS seminar 27.01.2010 iPhone Programming in ~30 mins (?) Diego Pizzocaro
- 2. Disclaimer These slides are heavily based on Evan Doll and Alan Cannistraro’s slides prepared for iPhone App Programming course @ Stanford http://www.stanford.edu/class/cs193p Look for iPhone Application Programming in iTunes U for videopodcasts.
- 3. Crash course • iPhone OS overview • Objective-C • Model-View-Controller (MVC)
- 5. iPhone
- 6. Mac OS X Cocoa Media Core Services Core OS
- 7. iPhone Cocoa Touch UI application framework which as a developer you Media are using the most Core Services Core OS
- 8. Developing on iPhone Tools Tools Tools Xcode Interface Builder Xcode Xcode Interface Builder Interface Builder Tools Xcode Interface Builder Cocoa Touch Frameworks Frameworks Frameworks Frameworks Foundation Foundation UIKit UIKit Foundation Foundation UIKit UIKit Language Language Language [textView setStringValue: @“Hello”]; [textView setStringValue: @“Hello”]; [textView setStringValue: @“Hello”]; (& Runtime) (& Runtime) (& Runtime) Language [textView setStringValue: @“Hello”]; Objective-C Objective-C Objective-C (& Runtime) Objective-C
- 9. Objective-C
- 10. Objective-C • Strict superset of C ‣ Mix C with Obj-C • Object oriented language • Based on message passing (similar to Smalltalk) • No garbage collector need to manually manage memory (not covered in this presentation)
- 11. Message Syntax [receiver message]; [receiver message:argument]; [receiver message:arg1 andArg:arg2];
- 12. Message Examples BankAccount *myAccount; //assume this exists int n = [myAccount accountNumber]; [myAccount deposit:100]; if([myAccount isNotEmpty]) { [myAccount withdraw:50 printReceipt:YES]; }
- 13. Some new types • Anonymous Objects • Class • ...others but no time! (Selectors “SEL”, Boolean “BOOL”, etc.)
- 14. Anonymous Objects • Normal (or Statically-typed) object BankAccount *anAccount • Anonymous (or Dynamically-typed) object id anAccount - Just id (Not id*) - id is the data type that indicates that we are talking about an object
- 15. Class • class instances responds to instance methods “-” - (id)init; - (double)accountNumber; int n = [myAccount accountNumber]; • classes responds to class methods “+” (like Java “static” methods) + (id)alloc; + (float)stdInterestRate; float rate = [BankAccount stdInterestRate];
- 16. Defining aaclass Defining a class Defining class A public header and a private implementation A public header and a private implementation A public header and a private implementation Header File File Header Header File Implementation File Implementation File File Implementation
- 17. Defining a class Defining a class Demo A public header and a private implementation A public header and a private implementation BankAccount class BankAccount.h Header File File Header BankAccount.m Implementation File File Implementation
- 18. Model - View - Controller (MVC)
- 19. Address Book
- 20. App Architecture Model View Controller
- 21. MVC • Only the Controller knows both Model and View • Makes code more reusable (especially the Model part) Interface Builder Model View Controller Xcode
- 22. Demo BankAccount app View Model ✓ MainWindow.xib BankAccount BankAccount BankAccount balance balance balance Value Changed - initWithBalance EVENT - -initWithBalance -initWithBalance setBalance -setBalance setBalance - - balance --balance balance Controller AccountController slider Outlets label myBankAccount Action - updateAccount
- 23. Demo BankAccount app View Model ✓ MainWindow.xib BankAccount BankAccount BankAccount balance balance balance Value Changed - initWithBalance EVENT - -initWithBalance -initWithBalance setBalance -setBalance setBalance - - balance --balance balance Controller AccountController slider label myBankAccount - updateAccount
- 24. Your turn! ;) • http://www.stanford.edu/class/cs193p • http://cs193p.com/ • iTunes U - “iPhone Application Programming” • iPhone Developer Program (FREE, but cannot deploy on real iPhone) • users.cs.cf.ac.uk/D.Pizzocaro Image from: http://www.trumpetvine.com/sketchblog/wp-content/images/2007.07/iphone_lg.jpg