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Can a uinavigationcontroller be dismissed via a push?


Asked by Reid Gates on Dec 13, 2021 FAQ



Any UIViewController (including UINavigationControllers as UINavigationControllers are a type of UIViewControllers) presented modally must be dismissed. Since UINavigationControllers hold UIViewControllers in their stack, they can present UIViewControllers both modally and via a push.
Keeping this in consideration,
The UINavigationController object creates, displays, and manages its associated navigation bar, and uses attributes of the view controllers you add to control the content displayed in the navigation bar. To control a navigation bar when using a navigation controller, the following steps are required:
Furthermore, The managing UINavigationController object uses the navigation items of the topmost two view controllers to populate the navigation bar with content. A navigation item always reflects information about its associated view controller. The navigation item must provide a title to display when the view controller is topmost on the navigation stack.
Subsequently,
Use a custom UINavigationController subclass, which implements the shouldPop method. When set, your shouldPopHandler () will be called to decide whether the controller will be pop or not.
Accordingly,
UINavigationController has a property navigationBarHidden, that allows you to hide/show navigation bar for whole nav controller. Each of three UIViewController will have nav bar since they are in UINavigationController. For example, you want to hide bar into the second (actually it doesn't matter in which one), then write into UIViewController2: