如何在扑朔迷离中为测验/游戏设置高分？

Question

我们第一次打开将高分设为0的时候 它将检查分数并更新其值。 我也使用了共享的首选项，这是行不通的。

import './question.dart';
import 'package:shared_preferences/shared_preferences.dart';

 class Quiz { 
 List<Question> _questions;
int _currentQuestionIndex = -1;
int _score = 0;
int _highscore;

  Future checkFirstSeen() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
    bool _seen = (prefs.getBool('seen') ?? false);

   if (_seen) {
  _highscore=_highscore;
   } else {
  prefs.setBool('seen', true);
  _highscore=0;
    }
}

 Quiz(this._questions) {
    _questions.shuffle();
  }

   List<Question> get questions => _questions;
  int get length => _questions.length;
  int get questionNumber => _currentQuestionIndex+1;
  int get score => _score;
  int get highscore => _highscore;

 Question get nextQuestion {
  _currentQuestionIndex++;
  if (_currentQuestionIndex >= length) return null;
  return _questions[_currentQuestionIndex];
  }

 void answer(bool isCorrect) {
  if (isCorrect) _score++;
 }

 //added fun for highscore
 void check() {  
 if (_score > _highscore) {
    _highscore = _score;
 } else {
  _highscore = _highscore;
 }
 }

 }

这总是返回总分和高分相同的值（数字）。告诉我解决方案

Answer 1

如果我正确理解了您要执行的操作，则需要按以下方式编辑c:\SpecRun\SpecRun.exe run Default.srprofile /baseFolder:C:\testBase /filter:"@MobileGalaxy" /log:specrun.log /outputfolder:output /report:MobileGalaxy.html 和Quiz.checkFirstSeen()方法：

Quiz.check()

在您发布的代码中，实际上不需要Future<void> checkFirstSeen() async { final SharedPreferences prefs = await SharedPreferences.getInstance(); _highscore = prefs.getInt('highScore') ?? 0; } Future<void> check() async { final SharedPreferences prefs = await SharedPreferences.getInstance(); if (_score > _highscore) { _highscore = _score; await prefs.setInt('highScore', _highscore); } } 共享变量，因此我将其删除。