Flutter：在 Widget 的状态的 initState 中从 Navigator 获取传递的参数

我有一辆StatefulWidget，我想在指定的路由上使用.我必须传递一些论点，我正在按照https://flutter.dev/docs/cookbook/navigation/navigate-with-arguments节中建议的那样做.

Navigator.pushNamed(
      context,
      routeName,
      arguments: <args>,
    );

现在，我需要访问州的initState方法中的这些参数，因为订阅一些外部事件需要这些参数.如果我将args = ModalRoute.of(context).settings.arguments;调用放在initState中，我会得到一个运行时异常.

20:49:44.129 4 info flutter.tools I/flutter ( 2680): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
20:49:44.129 5 info flutter.tools I/flutter ( 2680): The following assertion was thrown building Builder:
20:49:44.129 6 info flutter.tools I/flutter ( 2680): inheritFromWidgetOfExactType(_ModalScopeStatus) or inheritFromElement() was called before
20:49:44.130 7 info flutter.tools I/flutter ( 2680): _CourseCohortScreenState.initState() completed.
20:49:44.130 8 info flutter.tools I/flutter ( 2680): When an inherited widget changes, for example if the value of Theme.of() changes, its dependent
20:49:44.131 9 info flutter.tools I/flutter ( 2680): widgets are rebuilt. If the dependent widget's reference to the inherited widget is in a constructor
20:49:44.131 10 info flutter.tools I/flutter ( 2680): or an initState() method, then the rebuilt dependent widget will not reflect the changes in the
20:49:44.131 11 info flutter.tools I/flutter ( 2680): inherited widget.
20:49:44.138 12 info flutter.tools I/flutter ( 2680): Typically references to inherited widgets should occur in widget build() methods. Alternatively,
20:49:44.138 13 info flutter.tools I/flutter ( 2680): initialization based on inherited widgets can be placed in the didChangeDependencies method, which
20:49:44.138 14 info flutter.tools I/flutter ( 2680): is called after initState and whenever the dependencies change thereafter.
20:49:44.138 15 info flutter.tools I/flutter ( 2680): 
20:49:44.138 16 info flutter.tools I/flutter ( 2680): When the exception was thrown, this was the stack:
20:49:44.147 17 info flutter.tools I/flutter ( 2680): #0      StatefulElement.inheritFromElement.<anonymous closure> (package:flutter/src/widgets/framework.dart:3936:9)
20:49:44.147 18 info flutter.tools I/flutter ( 2680): #1      StatefulElement.inheritFromElement (package:flutter/src/widgets/framework.dart:3969:6)
20:49:44.147 19 info flutter.tools I/flutter ( 2680): #2      Element.inheritFromWidgetOfExactType (package:flutter/src/widgets/framework.dart:3285:14)
20:49:44.147 20 info flutter.tools I/flutter ( 2680): #3      ModalRoute.of (package:flutter/src/widgets/routes.dart:698:46)
20:49:44.147 21 info flutter.tools I/flutter ( 2680): #4      _CourseCohortScreenState.initState.<anonymous closure> (package:esk2/cohort_screen.dart:57:23)

我不想把这个逻辑放在build方法中，因为build可以被多次调用，而初始化只需要进行一次.我可以将整个逻辑放在带有布尔isInitialized标志的挡路中，但这似乎不是正确的方法. 到目前为止，是否不支持此要求/ case ？