Pass value to parent controller when dismiss the controller

Question

I want to send data to parentviewcontroller but the following code crashes. Give me the solution

Post *vc;
vc.abc =@"Comment Conttroller";
[self.parentViewController dismissModalViewControllerAnimated:YES];

Here, Post is the controller name from where I am calling the presentViewController:animated:completion method.

Answer 1

Put this in your parent controller in viewDidLoad

// get register to fetch notification  
[[NSNotificationCenter defaultCenter] addObserver:self
                                      selector:@selector(yourNotificationHandler:)
                                      name:@"MODELVIEW DISMISS" object:nil];
// --> Now create method in parent class as;
// Now create yourNotificationHandler: like this in parent class
-(void)yourNotificationHandler:(NSNotification *)notice{
    NSString *str = [notice object];
}

Put following to your child class where

-(void)dissmissModelView{

    [self dismissModalViewControllerAnimated:YES];
    NSLog(@"DismissModalviewController");

    //raise notification about dismiss 
    [[NSNotificationCenter defaultCenter] 
          postNotificationName:@"MODELVIEW DISMISS" 
                        object:@"Whatever you want to send to parent class"];  
}

as soon as model view get dismiss yourNotificationHandler get executed and whatever you pass as an objet will get fetch in your parent class. Please ask if still need some clarification.