Question

I saw some code when studying the open source project: here.
But I can’t figure out the meaning after I checked Objective-C syntax.

The code looks like this:

@interface UIViewController (UIViewDeckItem) 
@property(nonatomic,readonly,retain) IIViewDeckController *viewDeckController;  
@end

@implementation UIViewController (UIViewDeckItem) 
@dynamic viewDeckController;
...
@end

@implementation UIViewController (UIViewDeckController_ViewContainmentEmulation_Fakes) 
...
@end

Not sure where I can find the related Obejctive-C info about this implementation.

Answer 1

I think this is what you are looking for:

Categories and Extensions

http://developer.apple.com/library/ios/#documentation/cocoa/conceptual/objectivec/chapters/occategories.html