Setting action for back button in navigation controller
Try putting this into the view controller where you want to detect the press:
-(void) viewWillDisappear:(BOOL)animated { if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) { // back button was pressed. We know this is true because self is no longer // in the navigation stack. } [super viewWillDisappear:animated];}
I've implemented UIViewController-BackButtonHandler extension. It does not need to subclass anything, just put it into your project and override navigationShouldPopOnBackButton method in UIViewController class:
-(BOOL) navigationShouldPopOnBackButton { if(needsShowConfirmation) { // Show confirmation alert // ... return NO; // Ignore 'Back' button this time } return YES; // Process 'Back' button click and Pop view controler}
Unlike Amagrammer said, it's possible. You have to subclass your navigationController. I explained everything here (including example code).