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    <p>To recap your problem: </p> <ul> <li>A is a parent of B. </li> <li>A and B call C. </li> <li>A and B listen to C. </li> <li>When C send notification both A and B respond but you only want one of them to respond.</li> </ul> <p>I suggest letting A handle all communication with C, so if B need to talk to C it needs to go through A. This is how you can do this:</p> <p>in UiViewController A</p> <pre><code>-(void) viewDidLoad{ //Adding a notification listener should be done in initialization stage. [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(dismissViewC:) name:@"dismiss_popup" object:nil]; } - (void) comment{ if (&lt;user_logged_in&gt;){ //proceed with comment } else { NSNumber* caller=[NSNumber numberWithInt:COMMENT]; [Logistic login:caller]; } } -(void) dismissViewC:(NSNotification*) notify{ (NSNumber*) callerId =[notify object]; switch(callerId.intValue){ case COMMENT: //proceed with comment; case: SHARE: [self.viewB share]; } } -(void) dealloc { // removing an observer should be done in the dealloc stage [[NSNotificationCenter defaultCenter] removeObserver:self]; } </code></pre> <p>in UIView B:</p> <pre><code> - (void) share{ if (&lt;user_logged_in&gt;){ //proceed with share } else { NSNumber* caller=[NSNumber numberWithInt:SHARE]; [Logistic login:caller]; } } </code></pre> <p>Logistics will need to pass the new login parameter to C and C will look like this:</p> <pre><code>-(void) login:(NSNumber*) caller{ self.myCaller=caller; // proceed with login } -(void) dismissMe{ [[NSNotificationCenter defaultCenter] postNotificationName:@"dismiss_popup" object:self.caller]; } </code></pre>
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    1. PORemove observer or find a better alternative to NotificationCenter ios
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    1. COYou got me right) I'll check this soon, and answer you
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      1. USAleksey Potapov
 

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A row detail

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