Preserve Widget State in PageView while enabling Navigation

Question

I have a rather complex situation in a Flutter App. I have a Home screen that is a swipable PageView,that displays 3 child Widgets : Calendar, Messages, Profile.

My issu

Answer 1

From the documentation on AutomaticKeepAliveClientMixin:

/// A mixin with convenience methods for clients of [AutomaticKeepAlive]. Used with [State] subclasses.

/// Subclasses must implement [wantKeepAlive], and their [build] methods must call super.build (the return value will always return null, and should be ignored).

So in your code, before you return the Scaffold just call super.build:

  Widget build(BuildContext context) {
    super.build(context);
    return Scaffold(...);
  }