Objective C Delegate declaration

Question

Can someone tell me the difference between

@property (nonatomic, weak) id delegate;

@property (nonatomic, weak) id   delegate;

@property          


        

Answer 1

In the first example:

@property (nonatomic, weak) id delegate;

you create a property of type id which is 'any' type in objective c with name - delegate.

The second example:

@property (nonatomic, weak) id < protocol_name > delegate;

you create a property of type id which needs to conform to protocol_name protocol with name - delegate.

The last example:

@property (nonatomic, weak) UIViewController * < protocol_name > delegate;

you create a property of type UIViewController (pointer to UIViewController) which needs to conform to protocol_name protocol with name - delegate.