title: How to use jumpToPage Inside page without PageView
body: <p>I have a first page with PageView.</p>
  <pre><code>PageController _pageController = PageController();
  List&lt;Widget&gt; _screens = [HomeScreen(), PanicScreen(), ChartScreen()]; 
  
  PageView(
  controller: _pageController,
  children: _screens
  )
  </code></pre>
  <p>I have a button inside the <strong>HomeScreen()</strong> and I want to jump in <strong>ChartScreen()</strong></p>
  <p><strong>HomeScreen.dart</strong></p>
  <pre><code>class _HomeScreenState extends State&lt;HomeScreen&gt; {
    final PageController _pageController = PageController(initialPage: 0);
  
  Widget build(BuildContext context) {
      return Scaffold(
        backgroundColor: Colors.white,
        body: SafeArea(
          child: Stack(
            children: [
                    GestureDetector(
                       onTap: () {
                         _pageController.jumpToPage(1);
                    },
  
  </code></pre>
  <pre><code>ScrollController not attached to any scroll views.
  'package:flutter/src/widgets/scroll_controller.dart':
  Failed assertion: line 176 pos 12: '_positions.isNotEmpty'
  </code></pre>