Question

lets say i have a mainView, from it i pushed to subView.

i can send value from subView to mainView by this code

mainView *main = [[mainView alloc] initWithNibName:nil bundle:nil];
main.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:main animated:YES];

this code well send a textfield value from subView To mainView

NSString *text1 = field1.text;

[[mainView label1] setText:[NSString stringWithString:(NSString *)text1]];

what if i have an action called action1 in mainView and i want to call it when i come back from subView ? what is the code for that ?

thank you in advance 🙂

Answer 1

In your subView (where you want to call) put

[[NSNotificationCenter defaultCenter] postNotificationName:@"uniqueName" object:anyObjectYouWantToPassToMain];

In your mainView (viewDidLoad) put

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(yourMethodName:) name:@"uniqueName" object:nil];

Your main will call the method yourMethodName when the postNotification is executed.