flutter - 在_WidgetsAppState中找不到路由RouteSettings的生成器(“/”(null)

Question

我正在编写Flutter应用程序(这里是Kinda的初学者)。这是我的代码。main.dart

import 'package:flutter/material.dart';
import 'package:flutter_app_timer/helpers/constants.dart';

void main() => runApp(ContactApp());

class ContactApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: appTitle,
      theme: new ThemeData(
        primaryColor: appColor,
      ),
    );
  }

}  

constants.dart

import 'package:flutter/material.dart';

Color appColor = Color.fromRGBO(58, 66, 86, 1.0);

const appTitle = "Contact App";  

当我在模拟器中运行它时，出现以下异常消息。

I/flutter ( 7381): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
I/flutter ( 7381): The following assertion was thrown building IconTheme(IconThemeData#2abdc(color:
I/flutter ( 7381): Color(0xdd000000))):
I/flutter ( 7381): Could not find a generator for route RouteSettings("/", null) in the _WidgetsAppState.

我需要在 Navigator中添加 main.dart吗？我怎样才能解决这个问题？

Answer 1

您必须使用属性主页或 initialRoute 导航到初始屏幕才能显示给用户。

因此，只需在MaterialApp内部添加一个家庭属性

return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: appTitle,
      theme: new ThemeData(
        primaryColor: appColor,
      ),
      home: TestPage ()
    );

创建一个屏幕或页面以如下方式显示给用户，

class TestPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(child: Text("Hello World!!"),),
    );
  }
}