How to go back to initial page in in a PageView thats in a TabBarView when the TabBarView changes?

[Scott J]

I have a TabBarView with a PageView that has 2 pages in it. I have access to the indexIsChanging property in the TabBar. How can I go back to page 1 whenever the TabBar changes?

[Scott J]

Bump, is there a way to listen to indexIsChanging? I tried to do something like this in initState:

_controller = PageController(

      initialPage: 0,

    )..addListener(() {

        if (widget.tabController.indexIsChanging) 

        //goto previousPage....

      });

Other than widget.tabController.indexIsChanging not updating ....When the if statement is true

the statement doesn't execute once, it goes off multiple times. Not sure if I'm using it right

[Suzuki Tomohiro]

Can you share the URL of PageController documentation?

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[Scott J]

TabController: TabController class - material library - Dart API (flutter.dev)

PageController: PageController class - widgets library - Dart API (flutter.dev)

[Suzuki Tomohiro]

Thanks. Use animateToPage method.

https://api.flutter.dev/flutter/widgets/PageController/animateToPage.html

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[Scott J]

I think I'm asking the wrong questions, let me see if I can explain it better.

In the gif, I'm in the groups tab, if I click the button I go to the second page in that tab. What I would like to happen is when I switch tabs, the page controller goes back to the first page. With tabController there's a property called indexIsChanging and it's only true when tab changes. What I want to know is how can I go back to the first page when the tab is changed.

[Suzuki Tomohiro]

IndexIsChanging seems irrelevant.

I think that you just need to call animateToPage when a tab button is tapped.

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