使用邏輯使用 NoOfRoutes 條件導航下一個問題。在 QuestionControllerCopy 下獲取 nextQuestionCopy 中的索引是問題 akka。我們得到的只有第 0 個索引。如果我們能夠獲得正確的索引，導航就會成功。
QuestionController 類：-
import 'dart:core';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:get/get.dart';
import 'package:quiz_app/database/quiz_database.dart';
import 'package:quiz_app/models/Album.dart';
import 'package:quiz_app/models/Questions.dart';
import 'package:quiz_app/screens/score/score_screen.dart';
class QuestionControllerCopy extends GetxController
with SingleGetTickerProviderMixin {
static List savedList = [];
BlazorQuiz note;
AnimationController _animationController;
Animation _animation;
Animation get animation => this._animation;
PageController _pageController;
PageController get pageController => this._pageController;
bool _isAnswered = false;
bool get isAnswered => this._isAnswered;
int _correctAns;
int get correctAns => this._correctAns;
int _selectedAns;
int get selectedAns => this._selectedAns;
RxInt _questionNumber = 1.obs;
RxInt get questionNumber => this._questionNumber;
int _numOfCorrectAns = 0;
int get numOfCorrectAns => this._numOfCorrectAns;
@override
void initState(){
_pageController = PageController();
super.onInit();
}
@override
Future<void> onInit() async {
_animationController =
AnimationController(duration: Duration(seconds: 6000),vsync: this);
_animation = Tween<double>(begin: 0, end: 1).animate(_animationController)
..addListener(() {
update();
});
_animationController.forward().whenComplete(() => nextQuestionCopy(note,0));
_pageController = PageController();
super.onInit();
}
@override
void onClose() {
super.onClose();
_animationController.dispose();
_pageController.dispose();
}
void checkAnsCopy(Quiz question, int selectedIndex) {
_isAnswered = true;
_correctAns = int.parse(question.answer_index);
_selectedAns = selectedIndex;
if (_correctAns == _selectedAns) _numOfCorrectAns ;
debugPrint("_correctAnswer : $_correctAns , _selectedAns : $_selectedAns");
debugPrint("_numOfCorrectAns : $_numOfCorrectAns");
_animationController.stop();
update();
}
void checkAns(BlazorQuiz question, int selectedIndex) {
_isAnswered = true;
_selectedAns = selectedIndex;
debugPrint("_correctAnswer : $_correctAns , _selectedAns : $_selectedAns");
_animationController.stop();
update();
}
final qdb = QuizDatabase.instance;
Future<void>selectedOptions(int index) async {
debugPrint('index check radio outside $index');
if(note.NoOfRoutes == 4){
debugPrint('index check radio inside $index');
if(index == 0){
await _pageController.jumpToPage(note.Route1-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 1){
await _pageController.jumpToPage(note.Route2-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 2){
await _pageController.jumpToPage(note.Route3-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 3){
await _pageController.jumpToPage(note.Route4-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
}
return index;
}
Future<void> selectedOptionsCheck(int index) async {
debugPrint('index check checkIndex $index');
nextQuestionCopy(note,index);
if(note.NoOfRoutes == 4){
debugPrint('index check checkIndex inside $index');
if(index == 0){
_pageController.jumpToPage(note.Route1-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 1){
_pageController.jumpToPage(note.Route2-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 2){
_pageController.jumpToPage(note.Route3-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 3){
_pageController.jumpToPage(note.Route4-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
}
return index;
}
Future<void> nextQuestionCopy(BlazorQuiz note,int index) async {
await qdb.updateBlazor(note);
qdb.updateBlazorAnswer(note);
debugPrint('Entered nextQuestion for Update Blazor : $note, index $index');
debugPrint("NoOfRoutes==1$index");
if(note.NoOfRoutes == 1){
await _pageController.jumpToPage(note.Route1-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(note.NoOfRoutes == 4){
debugPrint('index check checkIndex inside $index');
if(index == 0){
await _pageController.jumpToPage(note.Route1-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 1){
await _pageController.jumpToPage(note.Route2-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 2){
await _pageController.jumpToPage(note.Route3-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 3){
await _pageController.jumpToPage(note.Route4-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
}
if(note.NoOfRoutes == 2){
debugPrint('index check checkIndex inside $index');
if(index == 0){
await _pageController.jumpToPage(note.Route1-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
if(index == 1){
await _pageController.jumpToPage(note.Route2-1);
_animationController.reset();
_animationController.forward().whenComplete(() => nextQuestionCopy(note,index));
}
}
}
scoreNavigation(int index) {
Get.to(ScoreScreen(index: index));
}
updateTheQnNum(int index) {
_questionNumber.value = index 1;
return _questionNumber.value;
}
}問題卡小部件 Radio Class :-
import 'package:flutter/material.dart';
import 'package:flutter_svg/svg.dart';
import 'package:get/get_core/src/get_main.dart';
import 'package:get/get_instance/src/extension_instance.dart';
import 'package:get/get_state_manager/src/rx_flutter/rx_obx_widget.dart';
import 'package:quiz_app/controllers/question_controller_copy.dart';
import 'package:quiz_app/models/Album.dart';
import 'package:quiz_app/models/Questions.dart';
import 'package:quiz_app/screens/quiz/components/option.dart';
import 'package:quiz_app/screens/quiz/components/option_copy.dart';
import 'package:quiz_app/screens/quiz/components/option_radio_button.dart';
import 'package:quiz_app/screens/quiz/components/progress_bar.dart';
import 'package:quiz_app/screens/quiz/components/question_card.dart';
import '../../../constants.dart';
class QuestionCardWidgetRadio extends StatelessWidget {
OptionRadio optionRadio =OptionRadio();
QuestionCardWidgetRadio({
Key key,
this.note,
this.index,
this.questionLength,
}) : super(key: key);
final BlazorQuiz note;
final int index;
final int questionLength;
bool _isAnswered = false;
bool get isAnswered => this._isAnswered;
@override
Widget build(BuildContext context) {
final qnID = "Question No : " note.Id.toString();
QuestionControllerCopy _questionController =
Get.put(QuestionControllerCopy());
debugPrint("Answer Print : ${note.Answer.split(",")}");
return Container(
margin: EdgeInsets.symmetric(horizontal: kDefaultPadding, vertical: 35),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(25),
),
padding: EdgeInsets.all(kDefaultPadding),
child: SingleChildScrollView(
scrollDirection: Axis.vertical,
child: Column(
children: [
Text(
qnID,
style: TextStyle(
color: Colors.black,
fontSize: 18,
fontWeight: FontWeight.normal,
),
),
Text(
note.Question,
style: TextStyle(
color: Colors.black,
fontSize: 20,
fontWeight: FontWeight.bold,
),
),
SizedBox(height: kDefaultPadding / 2),
...List.generate(
note.Answer.split(",").length,
(index) => OptionRadio(
index: index,
text: note.Answer.split(",")[index],
press: () =>{
_isAnswered = true,
_questionController.checkAns(note, index),
}
),
),
TextButton(
onPressed: (){
debugPrint('index value updated$index');
debugPrint("Clicked options : ${note.Answer.isNotEmpty} isAnswered: $isAnswered");
debugPrint('Check Index : ${index} check quiz model Lenght : ${QuizModel.question.length} check note Id : ${note.Id}');
if(index 1 == questionLength){
// score screen
debugPrint('Navigate to score screen');
Text(
"Submit",
style: Theme.of(context)
.textTheme
.button
.copyWith(color: Colors.white),
);
_questionController.scoreNavigation(index);
}
else{
if (note.Answer.isNotEmpty == !isAnswered) {
debugPrint('Clickkkkkked${optionRadio.index}');
_questionController.nextQuestionCopy(note,index);
}else{
debugPrint('Clickkkkk proper option');
}
}
},
child: Container(
width: double.infinity,
alignment: Alignment.center,
padding: EdgeInsets.all(kDefaultPadding * 0.75),
margin: EdgeInsets.all(37),
// 15
decoration: BoxDecoration(
gradient: kT2Gradient2,
borderRadius: BorderRadius.all(Radius.circular(0)),
),
child: Text(
"Next Question",
style: Theme.of(context)
.textTheme
.button
.copyWith(color: Colors.white),
),
),
),
],
),
),
);
}
}選項無線電類：-
import 'package:flutter/material.dart';
import 'package:get/get_state_manager/get_state_manager.dart';
import 'package:quiz_app/controllers/question_controller_copy.dart';
import '../../../constants.dart';
import 'package:flutter/src/material/radio_list_tile.dart';
class OptionRadio extends StatefulWidget {
final String text;
final int index;
final VoidCallback press;
const OptionRadio({
Key key,
this.text,
this.index,
this.press,
}) : super();
@override
OptionRadioPage createState() =>
OptionRadioPage(this.text, this.index, this.press);
}
class OptionRadioPage extends State<OptionRadio> {
final String text;
int index;
final VoidCallback press;
QuestionControllerCopy controllerCopy =QuestionControllerCopy();
int id = 1;
int val = -1;
int selectedButton = 0;
bool _isButtonDisabled;
OptionRadioPage(this.text, this.index, this.press);
@override
void initState() {
_isButtonDisabled = false;
}
@override
Widget build(BuildContext context) {
return GetBuilder<QuestionControllerCopy>(
init: QuestionControllerCopy(),
builder: (qnController) {
Color getTheRightColor() {
if (qnController.isAnswered) {
if (index == qnController.selectedAns &&
qnController.selectedAns == qnController.correctAns) {
return kBlackColor;
} else if (index == qnController.selectedAns &&
qnController.selectedAns != qnController.correctAns) {
return kBlackColor;
}
}
return kBlackColor;
}
return InkWell(
onTap: press,
child: Container(
child: Row(
children: <Widget>[
Expanded(
child: Container(
height: 60.0,
child: Theme(
data: Theme.of(context).copyWith(
unselectedWidgetColor: Colors.grey,
disabledColor: Colors.blue),
child: Column(children: [
RadioListTile(
title: Text(
"${index 1}. $text",
style: TextStyle(
color: getTheRightColor(), fontSize: 16),
softWrap: true,
),
groupValue: selectedButton,
value: index,
activeColor: Colors.green,
onChanged: (val) {
debugPrint(
'Radio button is clicked onChanged $val');
setState(() {
debugPrint('Radio button setState $val');
selectedButton = val;
debugPrint(
'Radio button is clicked onChanged $index');
controllerCopy.selectedOptions(index);
// var answerClicked = index;
});
},
toggleable: true,
),
]),
)),
),
],
),
),
);
});
}
@override
State<StatefulWidget> createState() {
throw UnimplementedError();
}
}如何正確地從 OptionRadio 類到 QuestionCardWidgetRadio 類獲取選定的索引值
uj5u.com熱心網友回復：
自己解決了。使用 SharedPreferences 將選定的索引值傳遞給條件。
在 OptionRadio.dart 類中設定 sharedpreferences 鍵、值，
SharedPreferences prefs = await SharedPreferences.getInstance();
prefs.setInt('intValue', index);在 QuestionCardWidgetRadio.dart 類中獲取 sharedpreferences 鍵、值，
SharedPreferences prefs = await SharedPreferences.getInstance();
int intValue = prefs.getInt('intValue');
_questionController.nextQuestionCopy(note,intValue);
prefs.remove("intValue");轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/343522.html