如何從另一個類

-1

//這是ClassA的

- (void)onDidFinishLaunchingNotification:(NSNotification*)notification 
{ 
    NSLOG(@"onDidFinishLaunchingNotification"); 
}

從另一個類 //這是B級呼叫通知呼叫通知

[[NSNotificationCenter defaultCenter]addObserver:nil selector:@selector(onDidFinishLaunchingNotification:) name:nil object:nil];

來源

2013-02-20 kiran

在A類中，添加自我作爲通知的觀察者名稱

[[NSNotificationCenter defaultCenter] addObserver:self 
             selector:@selector(onDidFinishLaunchingNotification:) 
              name:YourOnDidFinishLaunchingNotificationName 
              object:nil];

和B類，使用-postNotificationName:object:張貼通知：

[[NSNotificationCenter defaultCenter] postNotificationName:YourOnDidFinishLaunchingNotificationName 
                object:nil];

來源

2013-02-20 01:05:43 Kjuly

當我打電話時[[NSNotificationCenter defaultCenter] postNotificationName：YourOnDidFinishLaunchingNotificationName object：nil];我的應用程序崩潰了！ – kiran 2013-02-24 00:47:18

@kiran確保'selector'與消息名稱相同：'onDidFinishLaunchingNotification：'，不要忘記COLON。 – Kjuly 2013-02-24 02:39:11

B類你shuold的addObserver到B是這樣的：

[[NSNotificationCenter defaultCenter] addObserver:self 
             selector:@selector(onDidFinishLaunchingNotification:) 
              name:YourOnDidFinishLaunchingNotificationName 
              object:nil];

我想你應該看看addObserver:selector:name:object:

這裏是一個非常useful example使用NSNotification

來源

2013-02-20 01:28:42

如何從另一個類

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