That is an outdated drawback that I have not encountered shortly, however I’m revisiting it now and want some assist. I’m engaged on an iOS app utilizing UIKit and Storyboards, and I’ve come throughout a difficulty the place when switching between tabs, the views from the earlier tab’s UINavigationController stack keep seen within the UI, regardless that they shouldn’t.
The Drawback:
Tab 1: I’ve a UINavigationController inside the primary tab. Inside this navigation controller, I push a number of view controllers onto the navigation stack, making a “stack” of views.
Tab 2: I’ve one other tab with its personal UINavigationController. After I swap from Tab 1 to Tab 2, the earlier navigation stack (from Tab 1) stays seen, inflicting the brand new tab’s root view controller to not present correctly.
Aim:
I need to easily swap between tabs, making certain that after I swap from one tab to a different, the views from the earlier tab’s navigation stack are cleared. The transition ought to look seamless, with the UINavigationController of the brand new tab dealing with the navigation from its root view controller.
Setup:
I’m utilizing Storyboards for establishing the views.
I’m utilizing a customized subclass of UITabBarController to handle the tab bar logic.
Every tab has its personal UINavigationController as the basis view controller.
Diagram for higher understanding:
Tab 1 (with UINavigationController)
+---------------------------------------------------------+
| Root ViewController |
| +--------------------------------+ |
| | VC 1 | |
| +--------------------------------+ |
| | VC 2 | |
| +--------------------------------+ |
| | VC 3 | |
| +--------------------------------+ |
+---------------------------------------------------------+
Tab 2 (with UINavigationController)
+---------------------------------------------------------+
| Root ViewController |
| +--------------------------------+ |
| | VC A | |
| +--------------------------------+ |
| | VC B | |
| +--------------------------------+ |
+---------------------------------------------------------+
What I Want:
After I swap from Tab 1 (with VC 3 on high of the stack) to Tab 2, I need the views from Tab 1’s UINavigationController to be eliminated, and I need to begin contemporary with the basis view controller of Tab 2’s navigation controller.
My Try:
I’ve tried utilizing popToRootViewController(animated: true) when deciding on a tab, however that doesn’t work as anticipated as a result of the navigation stack isn’t being cleared quick sufficient for the transition, and I nonetheless see the earlier views.
Query:
How can I be certain that the earlier navigation stack is cleared when switching tabs, in order that the brand new tab exhibits its root view controller with none lingering views from the outdated tab?
How can I make the tab swap clean and pure, so it looks like a correct transition between tabs?
Anticipated Conduct:
When switching tabs, the earlier tab’s view controllers (within the UINavigationController stack) ought to be eliminated.
The brand new tab ought to show its root view controller with none beforehand pushed views from the outdated tab.
When switching tabs, the earlier tab’s view controllers (within the UINavigationController stack) ought to be eliminated.
The brand new tab ought to show its root view controller with none beforehand pushed views from the outdated tab.