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Leopard Sample Code: Cocoa
Objective-C is an ANSI C compatible language with dynamic object-oriented extensions. It is tailored for the efficient development and runtime performance of Cocoa programs. Because the language is an extension of ANSI C, developers can adapt existing C programs to use Objective-C frameworks without losing any original development work.

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Squiggles (HTML) (DMG) (ZIP)
Demonstrates many Cocoa fundamentals in a Document-based Application featuring custom drawing and event-handling.
2008-08-29
Reminders (HTML) (DMG) (ZIP)
Dashboard widget with a plug-in that displays upcoming iCal events, to do items, and calendars.
2008-07-25
AlbumToSlideshow (HTML) (DMG) (ZIP)
Demonstrates using CF and NSXML to create Final Cut Pro XML.
2008-05-15
Cocoa_With_Carbon_or_CPP (HTML) (DMG) (ZIP)
Shows how to call Carbon routines and C++ code from within an Objective-C Cocoa program.
2007-02-05
DynamicProperties (HTML) (DMG) (ZIP)
Demonstrates dynamically resolved properties, using a new Objective C 2.0 feature: dynamically resolved methods.
2006-08-01
MethodReplacement (HTML) (DMG) (ZIP)
Demonstrates an Objective C 2 compatible way to replace a method in an existing Objective C class.
2006-08-01