试试这个代码
在PlayQuiz（）中添加了forceSelecton参数
class Game extends StatelessWidget {final ForceSelection forceSelection;Game({Key key, @required this.forceSelection}) : super(key: key);@overrideWidget build(BuildContext context) { return MaterialApp( title: forceSelection.langSelection, // TODO should work and change later theme: new ThemeData( primaryColor: Colors.white, ), home: PlayQuiz(forceSelection), ); }}进行中测验
class PlayQuiz extends StatefulWidget { final ForceSelection forceSelection; PlayQuiz(this.forceSelection); @override PlayQuizState createState() => new PlayQuizState(forceSelection); }在PlayQuizState
class PlayQuizState extends State<PlayQuiz> { ForceSelection forceSelection; PlayQuizState(ForceSelection forceSelection) { this.forceSelection = forceSelection; }}
