CODEWITHSUNDEEP
cocoaobjective-c-runtime
Eimantas
Eimantas

Reputation: 49354

@dynamic property accessors in Cocoa

So far I have seen only CoreData using @dynamic property accessor definitions. What other ways are there for a property to get dynamic accessors in Cocoa object so that they can be marked as @dynamic?

Upvotes: 1

Views: 641

Answers (3)

Jens Ayton
Jens Ayton

Reputation: 14558

You can generate an accessor at runtime by responding to +resolveInstanceMethod: (which is what Core Data does) or simulate it with -forwardInvocation:. I’ve seen this used in mock model objects which support arbitrary (object-valued) properties, although in that case properties were declared in unimplemented categories so no explicit @dynamic was used. (Actually, I’ve written a stupid hack that makes NSDictionary behave this way.)

I could imagine a similar approach being used for a proxy object.

Upvotes: 1

tarmes
tarmes

Reputation: 15442

You can declare a property dynamic yourself. This may be useful if, for example, the getter and setter methods are implemented by your superclass.

Upvotes: 0

Denis
Denis

Reputation: 6413

By default, all declared properties are @dynamic, however you can declare them as @synthesize. @dynamic means, that you will provide getter and setter implementation in your class, that may be linked to no any i-var.

Upvotes: 0

Related Questions