Flutter: Keep BottomNavigationBar When Push to New Screen with Navigator

Question

In iOS, we have a UITabBarController which stays permanently at the bottom of the screen when we push to a new ViewController.

In Flutter, we have a bottomNavigation

Answer 1

tl;dr: Use CupertinoTabBar with CupertinoTabScaffold

The problem is not in Flutter but in UX just like Rémi Rousselet has mentioned.

It turned out Material Design doesn't recommend sub-pages in the hierarchy to access the Bottom navigation bar.

However, iOS Human Interface Guide recommend this. So, to use this feature, I had to adapt Cupertino widgets instead of Material ones. Specifically, in main, return a WidgetsApp/MaterialApp which contains a CupertinoTabScaffold. Implement the tab bar with a CupertinoTabBar and each screen is a CupertinoTabView.