I'm building a flutter app with persistent bottom navigation bar that contains a menu button.
The menu is supposed to open a drawer from any screen and trough the back button it should close it.
For that I'm using a scaffold including the bottom navigation widget and also the drawer.
This works fine for all screens that are directly accessible trough the bottom navigation bar.
The problem arises if I navigate (I'm using auto_route for routing) to another sub page.
In the sub page it seems that it is not possible to close the drawer.
In the sub page I dont provide a Scaffold since I would have nested scaffolds.
I'm using the WillPopScope and onPop looks like this:
if (Scaffold.of(context).isEndDrawerOpen) {
Navigator.of(context).pop();
Unfortunately this just pops the sub page while the drawer stays open.
One solution would be to pass a closing function to every child screen (or something like a global key for the global scaffold) but I would appreciate a more elegant solution
Do you have any idea how I can fix that?
Thanks in advance!
Related
I've looked through many tutorials for the side nav drawer. I can create one that works fine to lead to different pages. However, when I travel to a page that's different from home, it only gives me the arrow icon to go back to home at the top left instead of keeping the button to bring me back to the side navbar. How can I prevent this?
I can't use the home page to navigate everywhere because it's just supposed to be a blank splash screen.
You can define your drawer in a separate widget file, that you can import everywhere you have a scafold.
I created a package for it because I was missing similar functionality. If you want a Flutter approach for this navigation check out: https://api.flutter.dev/flutter/material/NavigationRail-class.html
Or if you want to have a look at my package: https://pub.dev/packages/side_navigation
It's because you're moving to a new page/Scaffold (probably using Navigator.push()). So, the default button in the AppBar will be the back button.
You can either have the same Drawer in every Scaffold you navigate to, which is not recommended since you'll just keep pushing routes to the navigation stack.
Or, you can change pages within the Scaffold. Check the interactive examples in BottomNavigationBar and NavigationRail to get an idea of how to do it. Basically instead of calling Navigator.push() when a tile in Drawer is tapped, just update the selected index and call setState().
I am trying to create an app that has the following basic setup for navigation:
tab1 -> subpage
tab2
tab3
with a bottom navigation bar for switching between the tabs and each tab having its own navigation stack. Furthermore I would like to add an AppBar with a drawer (as endDrawer) and the back button as leading widget in the AppBar.
The AppBar should be centrally managed so I put it in the main page of the app for maintenance purposes instead of having it on every page that is pushed. The drawer should also be updated later on when the user is logging in or out so it encouraged me more to place the AppBar only in the main page.
Now the issue is that I would like to update the AppBar to contain the back button when the app navigated to the subpage of tab1. Since the AppBar is in the parent I thought of RouteObservers as a possible solution by registering a RouteObserver on each NavigationState.
Yet I cannot get it to work because when I would like to subscribe on the RouteObserver in the HomePage in the didChangeDependencies() the currentState of the NavigatorState does not exist. Also I tried subscribing in the build method after the Scaffold with a flag for subscribing only once, but this didn't work either.
I created a github project with the basics of my current implementation:
https://github.com/S-Braeutigam/bottom-navbar-single-appbar
To get to the current state of code I used the following links:
https://codewithandrea.com/articles/multiple-navigators-bottom-navigation-bar/
https://api.flutter.dev/flutter/widgets/RouteObserver-class.html
Flutter 2.0 appbar back button disappeared if contains endDrawer (The solution gets close to what I would like to implement, but the AppBar should always be visible, not only on the sub page)
My main questions are:
Are RouteObservers the correct approach on how to track the navigation to subpages of tabs and display the back button based on it?
At what lifecycle hook in the main page should or could the subscription on the currentState of each NavigatorState be done? Wasn't able to find any where they are not null.
I want to make screen like that using flutter. The screen must have 2 tabs .both tab screens load on same main screen Eg. when user click tab one on screen load tab one ( as the photo) and click Tab 2 on screen load tab 2. How I can do that code
You need to use PageView() to show more than one page at the same place.
you need to pass to de PageView() the controller (which is a widget of PageController)
so you can call the pageController.animateToPage() so you can animate and switch between pages...
you can find how to use the PageView here, they explain really well!
hope that helped!
I'm trying to hide the status bar as soon as the drawer opens just like the google maps app on iOS.
Also, can I change the height of drawer header? Right now it's taking a third of the drawer itself.
Cheers
I'm creating my first app in flutter, and i'm having issues with state management. I have a MainPage.dart with BottomNavigationBar, and body: with tabPages[MainTab, ...]. In the MainTab i have a ListView, and when i click ListView item, it should open details, however BottomNavigationBar shouldn't be removed.
Below i have a design.(I'm using Scoped Model).
I tried these solutions
https://gist.github.com/HansMuller/0e76c54b1f2d4423efbdc2c185e761ef and How to route to page, without removing BottomNavigationBar in flutter?
But in those cases, i can't route to page without bottom navigation. When i click on FLoatingActionButton: it should open new page without bottom navigation (BottomNavigationBar stay always at the bottom, even if i don't want it)
https://medium.com/#daniyargilimov/lutter-bottomnavigationbar-with-multiple-navigators-725ff013489c
here is the working example...