Dynamic Screens Use a PageView to navigate through a series of questions.

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Page View

In the quiz screen, update the Scaffold to use a PageView.

file_type_flutter quiz.dart
    return Scaffold(
        appBar: AppBar(
        title: AnimatedProgressbar(value: state.progress),
        leading: IconButton(
            icon: const Icon(FontAwesomeIcons.times),
            onPressed: () => Navigator.pop(context),
        body: PageView.builder(
        physics: const NeverScrollableScrollPhysics(),
        scrollDirection: Axis.vertical,
        controller: state.controller,
        onPageChanged: (int idx) =>
            state.progress = (idx / (quiz.questions.length + 1)),
        itemBuilder: (BuildContext context, int idx) {
            if (idx == 0) {
            return StartPage(quiz: quiz);
            } else if (idx == quiz.questions.length + 1) {
            return CongratsPage(quiz: quiz);
            } else {
            return QuestionPage(question: quiz.questions[idx - 1]);

Update Quiz State

Add the page controller to the Quiz state so that it can be shared across multiple children easily.

file_type_flutter main.dart
import 'package:flutter/material.dart';
import 'package:quizapp/services/models.dart';

class QuizState with ChangeNotifier {

  final PageController controller = PageController();

  void nextPage() async {
    await controller.nextPage(
      duration: const Duration(milliseconds: 500),
      curve: Curves.easeOut,

Dynamic Pages

The PageView will generate one of three possible pages:

  • StartPage
  • QuestionPage
  • CongratsPage

View the full source code to review the code for these pages.


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