Animate a UINavigationBar's barTintColor

Question

The app I\'m working on changes the barTintColor of its navigation bar when pushing new view controllers. Right now we set that colour in the destination view contr

Answer 1

You can add extra animations that match the timing and animation curve of the view controller transition using UIViewControllerTransitionCoordinator.

A view controller's transitionCoordinator will be set after a view controller's animation has started (so in viewWillAppear of the presented view controller). Add any extra animations using animateAlongsideTransition:completion: on the transition coordinator.

An example:

[[self transitionCoordinator] animateAlongsideTransition:^(id context) {
    self.navigationController.navigationBar.translucent = NO;
    self.navigationController.navigationBar.barStyle = UIBarStyleBlack;
    self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
    self.navigationController.navigationBar.barTintColor = [UIColor redColor];
} completion:nil];