popViewControllerAnimated: custom transition animation?

Question

Yes, I have looked for an answer already. None of the solutions work, except one that doesn\'t give the option for a fade transition, only flip or curl.

Like this:

Answer 1

Joris Kluivers's answer in Swift 3 :

CATransaction.begin()
CATransaction.setDisableActions(true)

let animation = CATransition()
animation.type = kCATransitionFade
self.navigationController?.view.layer.add(animation, forKey: "someAnimation")
_ = self.navigationController?.popViewController(animated: false)

CATransaction.commit()

Answer 2

For this type of transition I would really recommend a modal view controller, thats the way the system was designed.

But if you insist on using the navigation controller there is a way, though somewhat ugly.

[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];

CATransition *transition = [CATransition animation];
[transition setType:kCATransitionFade];
[self.navigationController.view.layer addAnimation:transition forKey:@"someAnimation"];

[self.navigationController popViewControllerAnimated:YES];
[CATransaction commit];

The CATransaction will disable all standard animations. The CATransition adds a fade transition to the navigation controller layer when views are swapped (in this case removing the viewcontroller view that is popped).

Answer 3

In iOS 7 above, you may want to look into UIViewControllerAnimatedTransitioning for presented view controllers, or UINavigationControllerDelegate method :

- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC

I have some sample code from another question for more info.