Implement backBarButtonItem to send message to delegate before
inside NavigationController. I want to reimplement the back button in the second level contentviewview controller to call an additional method before it returns to the first level content table controller. In this method, I want to send a message to a self-implemented delegate to inform the first-level content view controller of the changes made to the seconds-level content view controller. After that I want to set up my view controller normally.
In the didSelectRowAtIndexPath of my first level controller, I have implemented:
SecondController *secondController = [[SecondController alloc] initWithNibName:@"Second" bundle:nil]; [secondController setDelegate:self]; UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithTitle:@"test" style:UIBarButtonItemStyleDone target:secondController action:@selector(didPressBack:)]; [[self navigationItem] setBackBarButtonItem:button]; [(UINavigationController*) self.parentViewController pushViewController:secondController animated:YES]; [secondController release];
So the back button on the second level shows "test" -text, but didPressBack: in secondController is not called.
Or is there a different approach to re-implementing the Back button on a second-level controller?
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