小编Sel*_*cer的帖子

我正在开发一个外语应用程序。我的申请中有多项选择题，但完成测试后出现此错误。我想知道是否有人知道这个错误的解决方案。

    EXCEPTION : 'package:flutter/src/widgets/framework.dart': Failed assertion: line 4263 pos 12: '_debugLifecycleState != _ElementLifecycle.defunct': is not true.\n    \n

我的密码

    class LoadJson extends StatelessWidget {\n      @override\n      Widget build(BuildContext context) {\n        return Scaffold(\n          body: FutureBuilder(\n            future: DefaultAssetBundle.of(context)\n                .loadString("lib/quiz/questions.json"),\n            builder: (context, snapshot) {\n              List mydata = json.decode(snapshot.data.toString());\n              if (mydata == null) {\n                return Center(\n                  child: Text("asld\xc3\xb6asid"),\n                );\n              } else {\n                return SorularinOlacagiPage(mydata: mydata);\n              }\n            },\n          ),\n        );\n      }\n    }\n    \n    class SorularinOlacagiPage extends StatefulWidget {\n      final mydata;\n    \n      const SorularinOlacagiPage({Key key, …