Notification CENTER-Nsnotificationcenter

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Ns_assume_nonnull_begin

/**************** Notifications ****************/

The notice, which is sent, is received.

@interface nsnotification: nsobject <nscopying, nscoding>

Name of the notice

@property (readonly, copy) nsstring *name;

A specific object.

@property (nullable, readonly, retain) ID object;

Parameter information

@property (nullable, readonly, copy) nsdictionary *userinfo;

Initialize a Notification object

Name in the future who will accept, (send to whom)

Object specific to one of the objects, or nil,

UserInfo additional information, parameters

-(instancetypensstring *) Name object: (nullable id) object UserInfo: (nullable nsdictionary *) UserInfo ns_available (10_6, 4_0) ns_designated_ Initializer

-(nullable instancetype) Initwithcoder: (nscoder *) Adecoder Ns_designated_initializer ;

@end

@interface nsnotification (nsnotificationcreation)

Initialize a notification

+ (instancetype) Notificationwithname: (nsstring *) AName object: (nullable ID) AnObject;

Ditto

+ (instancetype) Notificationwithname: (nsstring *) AName object: (nullable ID ) AnObject UserInfo: (nullable nsdictionary *) auserinfo;

-(instancetype) init /*ns_unavailable*/; /* do not invoke; not a valid initializer to this class * /

@end

/**************** Notification Center ****************/

@interface nsnotificationcenter: nsobject {

@package

void * __strong _impl;

void * __strong _callback;

void *_pad[);

}

Simple interest, get notification hubs, register, or send notifications. Must be first registered, sent after. Otherwise, it is invalid.

+ (nsnotificationcenter *) defaultcenter;

Registration notification, (monitoring notification)

-(void) Addobserver: (ID) Observer selector: (SEL) aselector name: (nullable NSString *) AName object: (nullable ID) anobject;

Send Notifications

-(void) Postnotification: (nsnotification *) notification;

-(void) Postnotificationname: (nsstring *) AName object: (nullable ID) anobject;

-(void) Postnotificationname: (nsstring *) AName object: (nullable ID) AnObject UserInfo: (nullable nsdictionary *) auserinfo;

Remove notifications

-(void) Removeobserver: (ID) observer;

-(void) Removeobserver: (ID) Observer name: (nullable nsstring *) AName object: ( nullable ID) anobject;

-(id <nsobject >) Addobserverforname: (nullable NSString< Span class= "S1" > *) Name object: (nullable id) Obj queue: (nullable nsoperationqueue *) queue Usingblock: (void (^) (nsnotification *note)) Block ns_available (10_6, 4< Span class= "S1" >_0)

//The return value is retained by the system, and should was held onto by the caller in

//order to remove the observer with Removeobserver:later and to stop observation.

@end

Ns_assume_nonnull_end

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Notification CENTER-Nsnotificationcenter