visibility

import 'package:flutter/material.dart';

class VisibilityPoc extends StatefulWidget {
  @override
  _VisibilityPocState createState() => _VisibilityPocState();
}

class _VisibilityPocState extends State<VisibilityPoc> {
  bool show = true;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Visibility(
              visible: show,
              maintainAnimation: true,
              maintainSize: true,
              maintainState: true,
              child: Container(
                width: 100,
                height: 100,
                color: Colors.red,
              ),v
            ),
            ElevatedButton(
                onPressed: () {
                  setState(() {
                    show = !show;
                  });
                },
                child: Text("Show & Hide"))
          ],
        ),
      ),
    );
  }
}