Using segues and nsnotificationcenter

Question

I have 2 viewcontrollers and I want to send a notification out from one to the other and have a label changed based on the name of the notification (pressing a UIButton). I just started using segues and found they are a very useful way to get from one view to another. The problem I am facing is that using a segue (modal at the moment), the second view controller is not receiving the notification. I believe that segues release and create new view controllers when used, not sure. Is there any way around this?

Thanks!

Answer 1

I think using NSNotification is not the right method for passing data from one VC to another. Like Rog said, use prepareForSegue and use a property on the destination VC:

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Always check to make sure you are handling the right Segue
    if ([segue.identifier isEqualToString:@"mySegue"]) {
         MyOtherViewController *movc = segue.destinationViewController;
         movc.myProperty = @"MyValue";
    } 
}

Answer 2

Use prepareForSegue for going-to a segue, and use the delegate pattern for coming back. Within prepareForSegue, set the originating viewController as the delegate of the destination viewController. When returning, have the destination viewController call it's delegate (the original viewController) for whatever method you implement.