OFNotificationCenter Class Reference

A class to send and register for notifications. More...

#include <ObjFW/ObjFW.h>

Inheritance diagram for OFNotificationCenter:

Instance Methods
(void)	- addObserver:selector:name:object:
	Adds an observer for the specified notification and object.
(void)	- removeObserver:selector:name:object:
	Removes an observer. All parameters must match those used with addObserver:selector:name:object:.
(id)	- addObserverForName:object:usingBlock:
	Adds an observer for the specified notification and object.
(void)	- removeObserver:
	Removes an observer. The specified observer must be one returned by addObserver:selector:name:object:.
(void)	- postNotification:
	Posts the specified notification.
(void)	- postNotificationName:object:
	Posts a notification with the specified name and object.
(void)	- postNotificationName:object:userInfo:
	Posts a notification with the specified name, object and additional information.
Instance Methods inherited from OFObject
(instancetype)	- init
	Initializes an already allocated object.
(nullable OFMethodSignature *)	- methodSignatureForSelector:
	Returns the method signature for the specified selector.
(void)	- dealloc
	Deallocates the object.
(void)	- performSelector:afterDelay:
	Performs the specified selector after the specified delay.
(void)	- performSelector:withObject:afterDelay:
	Performs the specified selector with the specified object after the specified delay.
(void)	- performSelector:withObject:withObject:afterDelay:
	Performs the specified selector with the specified objects after the specified delay.
(void)	- performSelector:withObject:withObject:withObject:afterDelay:
	Performs the specified selector with the specified objects after the specified delay.
(void)	- performSelector:withObject:withObject:withObject:withObject:afterDelay:
	Performs the specified selector with the specified objects after the specified delay.
(void)	- performSelector:onThread:waitUntilDone:
	Performs the specified selector on the specified thread.
(void)	- performSelector:onThread:withObject:waitUntilDone:
	Performs the specified selector on the specified thread with the specified object.
(void)	- performSelector:onThread:withObject:withObject:waitUntilDone:
	Performs the specified selector on the specified thread with the specified objects.
(void)	- performSelector:onThread:withObject:withObject:withObject:waitUntilDone:
	Performs the specified selector on the specified thread with the specified objects.
(void)	- performSelector:onThread:withObject:withObject:withObject:withObject:waitUntilDone:
	Performs the specified selector on the specified thread with the specified objects.
(void)	- performSelectorOnMainThread:waitUntilDone:
	Performs the specified selector on the main thread.
(void)	- performSelectorOnMainThread:withObject:waitUntilDone:
	Performs the specified selector on the main thread with the specified object.
(void)	- performSelectorOnMainThread:withObject:withObject:waitUntilDone:
	Performs the specified selector on the main thread with the specified objects.
(void)	- performSelectorOnMainThread:withObject:withObject:withObject:waitUntilDone:
	Performs the specified selector on the main thread with the specified objects.
(void)	- performSelectorOnMainThread:withObject:withObject:withObject:withObject:waitUntilDone:
	Performs the specified selector on the main thread with the specified objects.
(void)	- performSelector:onThread:afterDelay:
	Performs the specified selector on the specified thread after the specified delay.
(void)	- performSelector:onThread:withObject:afterDelay:
	Performs the specified selector on the specified thread with the specified object after the specified delay.
(void)	- performSelector:onThread:withObject:withObject:afterDelay:
	Performs the specified selector on the specified thread with the specified objects after the specified delay.
(void)	- performSelector:onThread:withObject:withObject:withObject:afterDelay:
	Performs the specified selector on the specified thread with the specified objects after the specified delay.
(void)	- performSelector:onThread:withObject:withObject:withObject:withObject:afterDelay:
	Performs the specified selector on the specified thread with the specified objects after the specified delay.
(nullable id)	- forwardingTargetForSelector:
	This method is called when resolveClassMethod: or resolveInstanceMethod: returned false. It should return a target to which the message should be forwarded.
(void)	- doesNotRecognizeSelector:
	Handles messages which are not understood by the receiver.
Instance Methods inherited from <OFObject>
(unsigned long)	- hash
	Returns a hash for the object.
(unsigned int)	- retainCount
	Returns the retain count.
(bool)	- isProxy
	Returns whether the object is a proxy object.
(bool)	- isKindOfClass:
	Returns a boolean whether the object is of the specified kind.
(bool)	- isMemberOfClass:
	Returns a boolean whether the object is a member of the specified class.
(bool)	- respondsToSelector:
	Returns a boolean whether the object responds to the specified selector.
(nullable IMP)	- methodForSelector:
	Returns the implementation for the specified selector.
(nullable id)	- performSelector:
	Performs the specified selector.
(nullable id)	- performSelector:withObject:
	Performs the specified selector with the specified object.
(nullable id)	- performSelector:withObject:withObject:
	Performs the specified selector with the specified objects.
(nullable id)	- performSelector:withObject:withObject:withObject:
	Performs the specified selector with the specified objects.
(nullable id)	- performSelector:withObject:withObject:withObject:withObject:
	Performs the specified selector with the specified objects.
(bool)	- isEqual:
	Checks two objects for equality.
(instancetype)	- retain
	Increases the retain count.
(void)	- release
	Decreases the retain count.
(instancetype)	- autorelease
	Adds the object to the topmost autorelease pool of the thread's autorelease pool stack.
(instancetype)	- self
	Returns the receiver.
(bool)	- allowsWeakReference
	Returns whether the object allows a weak reference.
(bool)	- retainWeakReference
	Retain a weak reference to this object.

Class Methods
(OFNotificationCenter *)	+ defaultCenter
	Returns the default notification center.
Class Methods inherited from OFObject
(void)	+ load
	A method which is called once when the class is loaded into the runtime.
(void)	+ unload
	A method which is called when the class is unloaded from the runtime.
(void)	+ initialize
	A method which is called the moment before the first call to the class is being made.
(instancetype)	+ alloc
	Allocates memory for an instance of the class and sets up the memory pool for the object.
(Class)	+ class
	Returns the class.
(OFString *)	+ className
	Returns the name of the class as a string.
(bool)	+ isSubclassOfClass:
	Returns a boolean whether the class is a subclass of the specified class.
(nullable Class)	+ superclass
	Returns the superclass of the class.
(bool)	+ instancesRespondToSelector:
	Checks whether instances of the class respond to a given selector.
(bool)	+ conformsToProtocol:
	Checks whether the class conforms to a given protocol.
(nullable IMP)	+ instanceMethodForSelector:
	Returns the implementation of the instance method for the specified selector.
(nullable OFMethodSignature *)	+ instanceMethodSignatureForSelector:
	Returns the method signature of the instance method for the specified selector.
(OFString *)	+ description
	Returns a description for the class, which is usually the class name.
(nullable IMP)	+ replaceClassMethod:withMethodFromClass:
	Replaces a class method with a class method from another class.
(nullable IMP)	+ replaceInstanceMethod:withMethodFromClass:
	Replaces an instance method with an instance method from another class.
(void)	+ inheritMethodsFromClass:
	Adds all methods from the specified class to the class that is the receiver.
(bool)	+ resolveClassMethod:
	Try to resolve the specified class method.
(bool)	+ resolveInstanceMethod:
	Try to resolve the specified instance method.
(id)	+ copy
	Returns the class.

Additional Inherited Members
Properties inherited from OFObject
OFString *	className
	The name of the object's class.
OFString *	description
	A description for the object.

Detailed Description

A class to send and register for notifications.

Method Documentation

addObserver:selector:name:object:

- (void) addObserver:		(id)	observer
selector:		(SEL)	selector
name:		(OFNotificationName)	name
object:		(nullable id)	object

Adds an observer for the specified notification and object.

Parameters

observer	The object that should receive notifications
selector	The selector to call on the observer on notifications. The method must take exactly one object of type OFNotification.
name	The name of the notification to observe
object	The object that should be sending the notification, or nil if the object should be ignored to determine what notifications to deliver

addObserverForName:object:usingBlock:

- (id) addObserverForName:		(OFNotificationName)	name
object:		(nullable id)	object
usingBlock:		(OFNotificationCenterBlock)	block

Adds an observer for the specified notification and object.

To remove the observer again, use removeObserver:.

Parameters

name	The name of the notification to observe
object	The object that should be sending the notification, or nil if the object should be ignored to determine what notifications to deliver
block	The block to handle notifications

Returns

An opaque object to remove the observer again

postNotification:

- (void) postNotification:

(OFNotification *)

notification

Posts the specified notification.

Parameters

notification

The notification to post

postNotificationName:object:

- (void) postNotificationName:		(OFNotificationName)	name
object:		(nullable id)	object

Posts a notification with the specified name and object.

Parameters

name	The name for the notification
object	The object for the notification

postNotificationName:object:userInfo:

- (void) postNotificationName:		(OFNotificationName)	name
object:		(nullable id)	object
userInfo:		(nullable OFDictionary *)	userInfo

Posts a notification with the specified name, object and additional information.

Parameters

name	The name for the notification
object	The object for the notification
userInfo	Additional information for the notification

removeObserver:

- (void) removeObserver:

(id)

observer

Removes an observer. The specified observer must be one returned by addObserver:selector:name:object:.

Parameters

observer

The object that was returned when adding the observer

removeObserver:selector:name:object:

- (void) removeObserver:		(id)	observer
selector:		(SEL)	selector
name:		(OFNotificationName)	name
object:		(nullable id)	object

Removes an observer. All parameters must match those used with addObserver:selector:name:object:.

Parameters

observer	The observer that was specified when adding the observer
selector	The selector that was specified when adding the observer
name	The name that was specified when adding the observer
object	The object that was specified when adding the observer

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The documentation for this class was generated from the following files:

• src/OFNotificationCenter.h
• src/OFNotificationCenter.m