小编Zab*_*lah的帖子

我是颤振新手。我正在构建一个测验应用程序，并拥有以下三个 dart 文件：

主程序.dart

import 'package:flutter/material.dart';\nimport './answer.dart';\nimport './question.dart';\n\nvoid main(){\n  runApp(MyApp());\n}\n\nclass MyApp extends StatefulWidget {\n  State<StatefulWidget> createState(){\n    return _MyAppState();\n  }\n}\n\nclass _MyAppState extends State<MyApp>{\n  var _questionIndex = 0;\n  _answerQuestion(){\n    setState(() {\n      _questionIndex = _questionIndex + 1;\n    });\n}\n  @override\n  Widget build(BuildContext context) {\n    var questions = [\n      {'questionText': 'What\\'s your favourite color ?',\n        'answers': ['Red','Blue','White','Black']\n      },\n      {'questionText': 'What\\'s your favourite Animal ?',\n        'answers': ['Dog','Rabbit','Tiger','Monkey']\n      },\n      {'questionText': 'What\\'s your favourite Day ?',\n        'answers': ['Tuesday','Monday','Sunday','Friday','Wednesday','Saturday']\n      },\n    ];\n    return MaterialApp(\n      home: Scaffold(\n        appBar: AppBar(\n …