Back Button Animation in Navigation Controller

Question

CATransitions can be used to animate transitions in Navigation Controllers when drilling down. However when using Back button og Navigation Controller (going back up) animation

Answer 1

For adding animation to the back button, you have to create your own back button, and on the back button action specify the animation you want.

1. Adding a back button to the navigation bar: add this line to your viewDidLoad method:

   self.navigationItem.leftBarButtonItem=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemReply target:self action:@selector(back)];
   

2. In the back method add this code:

   CATransition *transition = [CATransition animation];
   transition.duration = 1;
   transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
   transition.type = kCATransitionPush;
   transition.subtype = kCATransitionFromBottom;
   transition.delegate = self;
   [self.navigationController.view.layer addAnimation:transition forKey:nil];
   [self.navigationController popViewControllerAnimated:YES];