< IObserver > Protocol Reference

#import <IObserver.h>

Inherited by Observer.

List of all members.

Public Member Functions
(BOOL)	- compareNotifyContext:
(void)	- notifyObserver:
(void)	- setNotifyContext:
(void)	- setNotifyMethod:

---

Detailed Description

The interface definition for a PureMVC Observer.

In PureMVC, IObserver implementors assume these responsibilities:

• Encapsulate the notification (callback) method of the interested object.
• Encapsulate the notification context (this) of the interested object.
• Provide methods for setting the interested object' notification method and context.
• Provide a method for notifying the interested object.

The Observer Pattern as implemented within PureMVC exists to support event driven communication between the application and the actors of the MVC triad.

An Observer is an object that encapsulates information about an interested object with a notification method that should be called when an INotification is broadcast. The Observer then acts as a proxy for notifying the interested object.

Observers can receive Notifications by having their notifyObserver method invoked, passing in an object implementing the INotification interface, such as a subclass of Notification.

See also:

IView, INotification

---

Member Function Documentation

- (BOOL) compareNotifyContext:

(id)

object

Compare the given object to the notificaiton context object.

Parameters:

object

the object to compare.

Returns:

boolean indicating if the notification context and the object are the same.

Reimplemented in Observer.

- (void) notifyObserver:

(id< INotification >)

notification

Notify the interested object.

Parameters:

notification

the INotification to pass to the interested object's notification method

Reimplemented in Observer.

- (void) setNotifyContext:

(id)

notifyContext

Set the notification context.

Parameters:

notifyContext

the notification context (self) of the interested object

- (void) setNotifyMethod:

(SEL)

notifyMethod

Set the notification method.

The notification method should take one parameter of type INotification

Parameters:

notifyMethod

the notification (callback) selector of the interested object