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Notice

'NSNotification'에 해당되는 글 2건

  1. 2012.03.28 otification 사용하기 (다른 객체에게 메시지 전달)1
  2. 2012.03.02 NSNotificationcenter 사용
2012. 3. 28. 21:03 IPhone

otification 사용하기 (다른 객체에게 메시지 전달)

 

 

전달 받을 컨트롤러 에서 NotificationCenter에 옵져버 등록 한다.

NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(myFunction:) name:@"msgName" object:nil];


myFunction 함수 구현도 필요
-(void) myFunction:(NSNotification *) note {
[[note userInfo] objectForKey:@"myKey"]; // 메시지의 내의 myKey 라는 값을 가져온다.
}


통지를 보내는 쪽 에서 처리
// myKey라는 키로 value 라는 문자열을 전달 한다.
NSDictionary *dic = [NSDictionary dictionaryWithOjbect:@"value" forKey:@"myKey"];

NSNotificationCenter * nc = [NSNotificationCenter defaultCenter];
[nc postNotificationName:@"msgName" object:self userInfo:dic];


통지를 보내면 통지를 등록한 컨트롤로에 정의된 myFunction 함수가 호출된다.

◆ 데이터 여러개 보낼때
NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:EDIT_MAIN_TABLE], @"type",[NSNumber numberWithBool:YES], @"edit", nil];

◆ 데이터 하나만 보낼때
NSDictionary *dic = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:CARD_TYPE_MEMBERSHIP] forKey:@"type"];

출처 : http://comxp.tistory.com/188 


저작자표시
posted by Sunny's
2012. 3. 2. 17:29 IPhone

NSNotificationcenter 사용


Use NSNotification

출처 : http://stackoverflow.com/questions/2191594/how-to-send-and-receive-message-through-nsnotificationcenter-in-objective-c 

 @implementation TestClass


- (void) dealloc

{

    // If you don't remove yourself as an observer, the Notification Center

    // will continue to try and send notification objects to the deallocated

    // object.

    [[NSNotificationCenter defaultCenter] removeObserver:self];

    [super dealloc];

}


- (id) init

{

    self = [super init];

    if (!self) return nil;


    // Add this instance of TestClass as an observer of the TestNotification.

    // We tell the notification center to inform us of "TestNotification"

    // notifications using the receiveTestNotification: selector. By

    // specifying object:nil, we tell the notification center that we are not

    // interested in who posted the notification. If you provided an actual

    // object rather than nil, the notification center will only notify you

    // when the notification was posted by that particular object.


    [[NSNotificationCenter defaultCenter] addObserver:self

        selector:@selector(receiveTestNotification:) 

        name:@"TestNotification"

        object:nil];


    return self;

}


- (void) receiveTestNotification:(NSNotification *) notification

{

    // [notification name] should always be @"TestNotification"

    // unless you use this method for observation of other notifications

    // as well.


    if ([[notification name] isEqualToString:@"TestNotification"])

        NSLog (@"Successfully received the test notification!");

}


@end


... somewhere else in another class ...


- (void) someMethod

{


    // All instances of TestClass will be notified

    [[NSNotificationCenter defaultCenter] 

        postNotificationName:@"TestNotification" 

        object:self];


}
저작자표시
posted by Sunny's
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