Objective-C Crash Course for Web Developers

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About me LinkedIn: jverbogt Twitter: silentjohnny Facebook: silentjohnny E-mail: joris@mangrove.nl

History

iPhone SDK

AppStore

Build your own

Today’s Topics

Today’s Topics Native iPhone Development

Today’s Topics Native iPhone Development Live Demo

Today’s Topics Native iPhone Development Live Demo Questions

iPhone Development

iPhone Development Tools: Xcode / Interface Builder

iPhone Development Tools: Xcode / Interface Builder Language: Objective-C

iPhone Development Tools: Xcode / Interface Builder Language: Objective-C Frameworks: Foundation / UIKit

Xcode Editor

Xcode Editor Debugger

Xcode Editor Debugger Build Tools

Xcode Editor Debugger Build Tools Documentation

Interface Builder

Interface Builder Design UI

Interface Builder Design UI Bind to code

Interface Builder Design UI Bind to code Generate code

iPhone Simulator

iPhone Simulator Easy for debugging

iPhone Simulator Easy for debugging No device needed

iPhone Simulator Easy for debugging No device needed Fast round-trip

Not a real iPhone!

Objective-C

Objective-C Superset of C, can be mixed

Objective-C Superset of C, can be mixed Simple syntax

Objective-C Superset of C, can be mixed Simple syntax Dynamic runtime

OOP in Objective-C

OOP in Objective-C Single inheritance class tree

OOP in Objective-C Single inheritance class tree Protocols for multi-class behavior

OOP in Objective-C Single inheritance class tree Protocols for multi-class behavior Instance variables are hidden

OOP in Objective-C Single inheritance class tree Protocols for multi-class behavior Instance variables are hidden Objects respond to messages for interaction

OOP in Objective-C Single inheritance class tree Protocols for multi-class behavior Instance variables are hidden Objects respond to messages for interaction Variables are bound to classes at runtime

OOP in Objective-C Single inheritance class tree Protocols for multi-class behavior Instance variables are hidden Objects respond to messages for interaction Variables are bound to classes at runtime There is an anonymous object type ‘id’

Syntax

Syntax float moneyInTheBank = 0.0;

Syntax float moneyInTheBank = 0.0; var moneyInTheBank = 0.0;

Syntax

Syntax MacBookPro *myNewMac = [MacBookPro new];

Syntax MacBookPro *myNewMac = [MacBookPro new]; var myNewMac = new MacBookPro();

Syntax

Syntax if (moneyInTheBank > [myNewMac price]) { // Go buy one! }

Syntax if (moneyInTheBank > [myNewMac price]) { // Go buy one! } if (moneyInTheBank > myNewMac.getPrice()) { // Go buy one! }

Syntax

Syntax for (i=1; i<count; i++) { }

Messaging

Messaging NSString *name = [person name];

Messaging NSString *name = [person name]; var name = person.getName();

Messaging

Messaging [person setName:@”John”];

Messaging [person setName:@”John”]; person.setName(”John”);

Messaging

Messaging NSUInteger length = [[person name] length];

Messaging NSUInteger length = [[person name] length]; var length = person.getName().getLength();

Messaging

Messaging [person setName:name andAge:21];

Messaging [person setName:name andAge:21]; person.set({name:name, age:21});

Creating Instances

Creating Instances Person *person = [[Person alloc] init];

Creating Instances Person *person = [[Person alloc] init]; Person *person = [Person new];

Creating Instances Person *person = [[Person alloc] init]; Person *person = [Person new]; Person *person = [Person person];

Memory Management

Memory Management If you allocate memory, you need to clean it up!

Memory Management

Memory Management NSObject *keepMe = [[NSObject alloc] init];

Memory Management NSObject *keepMe = [[NSObject alloc] init]; [keepMe retain];

Memory Management NSObject *keepMe = [[NSObject alloc] init]; [keepMe retain]; [keepMe autorelease];

Memory Management NSObject *keepMe = [[NSObject alloc] init]; [keepMe retain]; [keepMe autorelease]; [keepMe release];

Memory Management NSObject *keepMe = [[NSObject alloc] init]; [keepMe retain]; [keepMe autorelease]; [keepMe release]; NSObject *keepMe = [NSObject object];

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Objective-C Crash Course for Web Developers

by Joris Verbogt on Mar 19, 2010

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Objective-C Crash Course for Web Developers Presentation Transcript